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52 results on '"J. J. Cherwinka"'

1. Charged-current non-standard neutrino interactions at Daya Bay

Author: The Daya Bay collaboration, F. P. An, W. D. Bai, A. B. Balantekin, M. Bishai, S. Blyth, G. F. Cao, J. Cao, J. F. Chang, Y. Chang, H. S. Chen, H. Y. Chen, S. M. Chen, Y. Chen, Y. X. Chen, Z. Y. Chen, J. Cheng, Y.-C. Cheng, Z. K. Cheng, J. J. Cherwinka, M. C. Chu, J. P. Cummings, O. Dalager, F. S. Deng, X. Y. Ding, Y. Y. Ding, M. V. Diwan, T. Dohnal, D. Dolzhikov, J. Dove, K. V. Dugas, H. Y. Duyang, D. A. Dwyer, J. P. Gallo, M. Gonchar, G. H. Gong, H. Gong, W. Q. Gu, J. Y. Guo, L. Guo, X. H. Guo, Y. H. Guo, Z. Guo, R. W. Hackenburg, Y. Han, S. Hans, M. He, K. M. Heeger, Y. K. Heng, Y. K. Hor, Y. B. Hsiung, B. Z. Hu, J. R. Hu, T. Hu, Z. J. Hu, H. X. Huang, J. H. Huang, X. T. Huang, Y. B. Huang, P. Huber, D. E. Jaffe, K. L. Jen, X. L. Ji, X. P. Ji, R. A. Johnson, D. Jones, L. Kang, S. H. Kettell, S. Kohn, M. Kramer, T. J. Langford, J. Lee, J. H. C. Lee, R. T. Lei, R. Leitner, J. K. C. Leung, F. Li, H. L. Li, J. J. Li, Q. J. Li, R. H. Li, S. Li, S. C. Li, W. D. Li, X. N. Li, X. Q. Li, Y. F. Li, Z. B. Li, H. Liang, C. J. Lin, G. L. Lin, S. Lin, J. J. Ling, J. M. Link, L. Littenberg, B. R. Littlejohn, J. C. Liu, J. L. Liu, J. X. Liu, C. Lu, H. Q. Lu, K. B. Luk, B. Z. Ma, X. B. Ma, X. Y. Ma, Y. Q. Ma, R. C. Mandujano, C. Marshall, K. T. McDonald, R. D. McKeown, Y. Meng, J. Napolitano, D. Naumov, E. Naumova, T. M. T. Nguyen, J. P. Ochoa-Ricoux, A. Olshevskiy, J. Park, S. Patton, J. C. Peng, C. S. J. Pun, F. Z. Qi, M. Qi, X. Qian, N. Raper, J. Ren, C. Morales Reveco, R. Rosero, B. Roskovec, X. C. Ruan, B. Russell, H. Steiner, J. L. Sun, T. Tmej, W.-H. Tse, C. E. Tull, Y. C. Tung, B. Viren, V. Vorobel, C. H. Wang, J. Wang, M. Wang, N. Y. Wang, R. G. Wang, W. Wang, X. Wang, Y. F. Wang, Z. Wang, Z. M. Wang, H. Y. Wei, L. H. Wei, W. Wei, L. J. Wen, K. Whisnant, C. G. White, H. L. H. Wong, E. Worcester, D. R. Wu, Q. Wu, W. J. Wu, D. M. Xia, Z. Q. Xie, Z. Z. Xing, H. K. Xu, J. L. Xu, T. Xu, T. Xue, C. G. Yang, L. Yang, Y. Z. Yang, H. F. Yao, M. Ye, M. Yeh, B. L. Young, H. Z. Yu, Z. Y. Yu, B. B. Yue, V. Zavadskyi, S. Zeng, Y. Zeng, L. Zhan, C. Zhang, F. Y. Zhang, H. H. Zhang, J. L. Zhang, J. W. Zhang, Q. M. Zhang, S. Q. Zhang, X. T. Zhang, Y. M. Zhang, Y. X. Zhang, Y. Y. Zhang, Z. J. Zhang, Z. P. Zhang, Z. Y. Zhang, J. Zhao, R. Z. Zhao, L. Zhou, H. L. Zhuang, and J. H. Zou
Subjects: Neutrino Mixing, Non-Standard Neutrino Properties, Neutrino Interactions, SMEFT, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract The full data set of the Daya Bay reactor neutrino experiment is used to probe the effect of the charged current non-standard interactions (CC-NSI) on neutrino oscillation experiments. Two different approaches are applied and constraints on the corresponding CC-NSI parameters are obtained with the neutrino flux taken from the Huber-Mueller model with a 5% uncertainty. For the quantum mechanics-based approach (QM-NSI), the constraints on the CC-NSI parameters ϵ eα and ϵ eα s $$ {\epsilon}_{e\alpha}^s $$ are extracted with and without the assumption that the effects of the new physics are the same in the production and detection processes, respectively. The approach based on the weak effective field theory (WEFT-NSI) deals with four types of CC-NSI represented by the parameters [ε X ] eα . For both approaches, the results for the CC-NSI parameters are shown for cases with various fixed values of the CC-NSI and the Dirac CP-violating phases, and when they are allowed to vary freely. We find that constraints on the QM-NSI parameters ϵ eα and ϵ eα s $$ {\epsilon}_{e\alpha}^s $$ from the Daya Bay experiment alone can reach the order O $$ \mathcal{O} $$ (0.01) for the former and O $$ \mathcal{O} $$ (0.1) for the latter, while for WEFT-NSI parameters [ε X ] eα , we obtain O $$ \mathcal{O} $$ (0.1) for both cases.
Published: 2024
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2. Erratum to: The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs

Author: D. S. Akerib, C. W. Akerlof, D. Yu. Akimov, A. Alquahtani, S. K. Alsum, T. J. Anderson, N. Angelides, H. M. Araújo, A. Arbuckle, J. E. Armstrong, M. Arthurs, H. Auyeung, S. Aviles, X. Bai, A. J. Bailey, J. Balajthy, S. Balashov, J. Bang, M. J. Barry, D. Bauer, P. Bauer, A. Baxter, J. Belle, P. Beltrame, J. Bensinger, T. Benson, E. P. Bernard, A. Bernstein, A. Bhatti, A. Biekert, T. P. Biesiadzinski, H. J. Birch, B. Birrittella, K. E. Boast, A. I. Bolozdynya, E. M. Boulton, B. Boxer, R. Bramante, S. Branson, P. Brás, M. Breidenbach, C. A. J. Brew, J. H. Buckley, V. V. Bugaev, R. Bunker, S. Burdin, J. K. Busenitz, R. Cabrita, J. S. Campbell, C. Carels, D. L. Carlsmith, B. Carlson, M. C. Carmona-Benitez, M. Cascella, C. Chan, J. J. Cherwinka, A. A. Chiller, C. Chiller, N. I. Chott, A. Cole, J. Coleman, D. Colling, R. A. Conley, A. Cottle, R. Coughlen, G. Cox, W. W. Craddock, D. Curran, A. Currie, J. E. Cutter, J. P. da Cunha, C. E. Dahl, S. Dardin, S. Dasu, J. Davis, T. J. R. Davison, L. de Viveiros, N. Decheine, A. Dobi, J. E. Y. Dobson, E. Druszkiewicz, A. Dushkin, T. K. Edberg, W. R. Edwards, B. N. Edwards, J. Edwards, M. M. Elnimr, W. T. Emmet, S. R. Eriksen, C. H. Faham, A. Fan, S. Fayer, S. Fiorucci, H. Flaecher, I. M. Fogarty Florang, P. Ford, V. B. Francis, E. D. Fraser, F. Froborg, T. Fruth, R. J. Gaitskell, N. J. Gantos, D. Garcia, V. M. Gehman, R. Gelfand, J. Genovesi, R. M. Gerhard, C. Ghag, E. Gibson, M. G. D. Gilchriese, S. Gokhale, B. Gomber, T. G. Gonda, A. Greenall, S. Greenwood, G. Gregerson, M. G. D. van der Grinten, C. B. Gwilliam, C. R. Hall, D. Hamilton, S. Hans, K. Hanzel, T. Harrington, A. Harrison, J. Harrison, C. Hasselkus, S. J. Haselschwardt, D. Hemer, S. A. Hertel, J. Heise, S. Hillbrand, O. Hitchcock, C. Hjemfelt, M. D. Hoff, B. Holbrook, E. Holtom, J. Y-K. Hor, M. Horn, D. Q. Huang, T. W. Hurteau, C. M. Ignarra, M. N. Irving, R. G. Jacobsen, O. Jahangir, S. N. Jeffery, W. Ji, M. Johnson, J. Johnson, P. Johnson, W. G. Jones, A. C. Kaboth, A. Kamaha, K. Kamdin, V. Kasey, K. Kazkaz, J. Keefner, D. Khaitan, M. Khaleeq, A. Khazov, A. V. Khromov, I. Khurana, Y. D. Kim, W. T. Kim, C. D. Kocher, D. Kodroff, A. M. Konovalov, L. Korley, E. V. Korolkova, M. Koyuncu, J. Kras, H. Kraus, S. W. Kravitz, H. J. Krebs, L. Kreczko, B. Krikler, V. A. Kudryavtsev, A. V. Kumpan, S. Kyre, A. R. Lambert, B. Landerud, N. A. Larsen, A. Laundrie, E. A. Leason, H. S. Lee, J. Lee, C. Lee, B. G. Lenardo, D. S. Leonard, R. Leonard, K. T. Lesko, C. Levy, J. Li, Y. Liu, J. Liao, F.-T. Liao, J. Lin, A. Lindote, R. Linehan, W. H. Lippincott, R. Liu, X. Liu, C. Loniewski, M. I. Lopes, E. Lopez-Asamar, B. López Paredes, W. Lorenzon, D. Lucero, S. Luitz, J. M. Lyle, C. Lynch, P. A. Majewski, J. Makkinje, D. C. Malling, A. Manalaysay, L. Manenti, R. L. Mannino, N. Marangou, D. J. Markley, P. MarrLaundrie, T. J. Martin, M. F. Marzioni, C. Maupin, C. T. McConnell, D. N. McKinsey, J. McLaughlin, D.-M. Mei, Y. Meng, E. H. Miller, Z. J. Minaker, E. Mizrachi, J. Mock, D. Molash, A. Monte, M. E. Monzani, J. A. Morad, E. Morrison, B. J. Mount, A. St. J. Murphy, D. Naim, A. Naylor, C. Nedlik, C. Nehrkorn, H. N. Nelson, J. Nesbit, F. Neves, J. A. Nikkel, J. A. Nikoleyczik, A. Nilima, J. O’Dell, H. Oh, F. G. O’Neill, K. O’Sullivan, I. Olcina, M. A. Olevitch, K. C. Oliver-Mallory, L. Oxborough, A. Pagac, D. Pagenkopf, S. Pal, K. J. Palladino, V. M. Palmaccio, J. Palmer, M. Pangilinan, N. Parveen, S. J. Patton, E. K. Pease, B. P. Penning, G. Pereira, C. Pereira, I. B. Peterson, A. Piepke, S. Pierson, S. Powell, R. M. Preece, K. Pushkin, Y. Qie, M. Racine, B. N. Ratcliff, J. Reichenbacher, L. Reichhart, C. A. Rhyne, A. Richards, Q. Riffard, G. R. C. Rischbieter, J. P. Rodrigues, H. J. Rose, R. Rosero, P. Rossiter, R. Rucinski, G. Rutherford, J. S. Saba, L. Sabarots, D. Santone, M. Sarychev, A. B. M. R. Sazzad, R. W. Schnee, M. Schubnell, P. R. Scovell, M. Severson, D. Seymour, S. Shaw, G. W. Shutt, T. A. Shutt, J. J. Silk, C. Silva, K. Skarpaas, W. Skulski, A. R. Smith, R. J. Smith, R. E. Smith, J. So, M. Solmaz, V. N. Solovov, P. Sorensen, V. V. Sosnovtsev, I. Stancu, M. R. Stark, S. Stephenson, N. Stern, A. Stevens, T. M. Stiegler, K. Stifter, R. Studley, T. J. Sumner, K. Sundarnath, P. Sutcliffe, N. Swanson, M. Szydagis, M. Tan, W. C. Taylor, R. Taylor, D. J. Taylor, D. Temples, B. P. Tennyson, P. A. Terman, K. J. Thomas, J. A. Thomson, D. R. Tiedt, M. Timalsina, W. H. To, A. Tomás, T. E. Tope, M. Tripathi, D. R. Tronstad, C. E. Tull, W. Turner, L. Tvrznikova, M. Utes, U. Utku, S. Uvarov, J. Va’vra, A. Vacheret, A. Vaitkus, J. R. Verbus, T. Vietanen, E. Voirin, C. O. Vuosalo, S. Walcott, W. L. Waldron, K. Walker, J. J. Wang, R. Wang, L. Wang, W. Wang, Y. Wang, J. R. Watson, J. Migneault, S. Weatherly, R. C. Webb, W.-Z. Wei, M. While, R. G. White, J. T. White, D. T. White, T. J. Whitis, W. J. Wisniewski, K. Wilson, M. S. Witherell, F. L. H. Wolfs, J. D. Wolfs, D. Woodward, S. D. Worm, X. Xiang, Q. Xiao, J. Xu, M. Yeh, J. Yin, I. Young, C. Zhang, and P. Zarzhitsky
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Published: 2022
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3. The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs

Author: D. S. Akerib, C. W. Akerlof, D. Yu. Akimov, A. Alquahtani, S. K. Alsum, T. J. Anderson, N. Angelides, H. M. Araújo, A. Arbuckle, J. E. Armstrong, M. Arthurs, H. Auyeung, S. Aviles, X. Bai, A. J. Bailey, J. Balajthy, S. Balashov, J. Bang, M. J. Barry, D. Bauer, P. Bauer, A. Baxter, J. Belle, P. Beltrame, J. Bensinger, T. Benson, E. P. Bernard, A. Bernstein, A. Bhatti, A. Biekert, T. P. Biesiadzinski, H. J. Birch, B. Birrittella, K. E. Boast, A. I. Bolozdynya, E. M. Boulton, B. Boxer, R. Bramante, S. Branson, P. Brás, M. Breidenbach, C. A. J. Brew, J. H. Buckley, V. V. Bugaev, R. Bunker, S. Burdin, J. K. Busenitz, R. Cabrita, J. S. Campbell, C. Carels, D. L. Carlsmith, B. Carlson, M. C. Carmona-Benitez, M. Cascella, C. Chan, J. J. Cherwinka, A. A. Chiller, C. Chiller, N. I. Chott, A. Cole, J. Coleman, D. Colling, R. A. Conley, A. Cottle, R. Coughlen, G. Cox, W. W. Craddock, D. Curran, A. Currie, J. E. Cutter, J. P. da Cunha, C. E. Dahl, S. Dardin, S. Dasu, J. Davis, T. J. R. Davison, L. de Viveiros, N. Decheine, A. Dobi, J. E. Y. Dobson, E. Druszkiewicz, A. Dushkin, T. K. Edberg, W. R. Edwards, B. N. Edwards, J. Edwards, M. M. Elnimr, W. T. Emmet, S. R. Eriksen, C. H. Faham, A. Fan, S. Fayer, S. Fiorucci, H. Flaecher, I. M. Fogarty Florang, P. Ford, V. B. Francis, E. D. Fraser, F. Froborg, T. Fruth, R. J. Gaitskell, N. J. Gantos, D. Garcia, V. M. Gehman, R. Gelfand, J. Genovesi, R. M. Gerhard, C. Ghag, E. Gibson, M. G. D. Gilchriese, S. Gokhale, B. Gomber, T. G. Gonda, A. Greenall, S. Greenwood, G. Gregerson, M. G. D. van der Grinten, C. B. Gwilliam, C. R. Hall, D. Hamilton, S. Hans, K. Hanzel, T. Harrington, A. Harrison, J. Harrison, C. Hasselkus, S. J. Haselschwardt, D. Hemer, S. A. Hertel, J. Heise, S. Hillbrand, O. Hitchcock, C. Hjemfelt, M. D. Hoff, B. Holbrook, E. Holtom, J. Y-K. Hor, M. Horn, D. Q. Huang, T. W. Hurteau, C. M. Ignarra, M. N. Irving, R. G. Jacobsen, O. Jahangir, S. N. Jeffery, W. Ji, M. Johnson, J. Johnson, P. Johnson, W. G. Jones, A. C. Kaboth, A. Kamaha, K. Kamdin, V. Kasey, K. Kazkaz, J. Keefner, D. Khaitan, M. Khaleeq, A. Khazov, A. V. Khromov, I. Khurana, Y. D. Kim, W. T. Kim, C. D. Kocher, D. Kodroff, A. M. Konovalov, L. Korley, E. V. Korolkova, M. Koyuncu, J. Kras, H. Kraus, S. W. Kravitz, H. J. Krebs, L. Kreczko, B. Krikler, V. A. Kudryavtsev, A. V. Kumpan, S. Kyre, A. R. Lambert, B. Landerud, N. A. Larsen, A. Laundrie, E. A. Leason, H. S. Lee, J. Lee, C. Lee, B. G. Lenardo, D. S. Leonard, R. Leonard, K. T. Lesko, C. Levy, J. Li, Y. Liu, J. Liao, F.-T. Liao, J. Lin, A. Lindote, R. Linehan, W. H. Lippincott, R. Liu, X. Liu, C. Loniewski, M. I. Lopes, E. Lopez-Asamar, B. López Paredes, W. Lorenzon, D. Lucero, S. Luitz, J. M. Lyle, C. Lynch, P. A. Majewski, J. Makkinje, D. C. Malling, A. Manalaysay, L. Manenti, R. L. Mannino, N. Marangou, D. J. Markley, P. MarrLaundrie, T. J. Martin, M. F. Marzioni, C. Maupin, C. T. McConnell, D. N. McKinsey, J. McLaughlin, D.-M. Mei, Y. Meng, E. H. Miller, Z. J. Minaker, E. Mizrachi, J. Mock, D. Molash, A. Monte, M. E. Monzani, J. A. Morad, E. Morrison, B. J. Mount, A. St. J. Murphy, D. Naim, A. Naylor, C. Nedlik, C. Nehrkorn, H. N. Nelson, J. Nesbit, F. Neves, J. A. Nikkel, J. A. Nikoleyczik, A. Nilima, J. O’Dell, H. Oh, F. G. O’Neill, K. O’Sullivan, I. Olcina, M. A. Olevitch, K. C. Oliver-Mallory, L. Oxborough, A. Pagac, D. Pagenkopf, S. Pal, K. J. Palladino, V. M. Palmaccio, J. Palmer, M. Pangilinan, N. Parveen, S. J. Patton, E. K. Pease, B. P. Penning, G. Pereira, C. Pereira, I. B. Peterson, A. Piepke, S. Pierson, S. Powell, R. M. Preece, K. Pushkin, Y. Qie, M. Racine, B. N. Ratcliff, J. Reichenbacher, L. Reichhart, C. A. Rhyne, A. Richards, Q. Riffard, G. R. C. Rischbieter, J. P. Rodrigues, H. J. Rose, R. Rosero, P. Rossiter, R. Rucinski, G. Rutherford, J. S. Saba, L. Sabarots, D. Santone, M. Sarychev, A. B. M. R. Sazzad, R. W. Schnee, M. Schubnell, P. R. Scovell, M. Severson, D. Seymour, S. Shaw, G. W. Shutt, T. A. Shutt, J. J. Silk, C. Silva, K. Skarpaas, W. Skulski, A. R. Smith, R. J. Smith, R. E. Smith, J. So, M. Solmaz, V. N. Solovov, P. Sorensen, V. V. Sosnovtsev, I. Stancu, M. R. Stark, S. Stephenson, N. Stern, A. Stevens, T. M. Stiegler, K. Stifter, R. Studley, T. J. Sumner, K. Sundarnath, P. Sutcliffe, N. Swanson, M. Szydagis, M. Tan, W. C. Taylor, R. Taylor, D. J. Taylor, D. Temples, B. P. Tennyson, P. A. Terman, K. J. Thomas, J. A. Thomson, D. R. Tiedt, M. Timalsina, W. H. To, A. Tomás, T. E. Tope, M. Tripathi, D. R. Tronstad, C. E. Tull, W. Turner, L. Tvrznikova, M. Utes, U. Utku, S. Uvarov, J. Va’vra, A. Vacheret, A. Vaitkus, J. R. Verbus, T. Vietanen, E. Voirin, C. O. Vuosalo, S. Walcott, W. L. Waldron, K. Walker, J. J. Wang, R. Wang, L. Wang, W. Wang, Y. Wang, J. R. Watson, J. Migneault, S. Weatherly, R. C. Webb, W.-Z. Wei, M. While, R. G. White, J. T. White, D. T. White, T. J. Whitis, W. J. Wisniewski, K. Wilson, M. S. Witherell, F. L. H. Wolfs, J. D. Wolfs, D. Woodward, S. D. Worm, X. Xiang, Q. Xiao, J. Xu, M. Yeh, J. Yin, I. Young, C. Zhang, and P. Zarzhitsky
Subjects: Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract LUX-ZEPLIN (LZ) is a second-generation direct dark matter experiment with spin-independent WIMP-nucleon scattering sensitivity above $${1.4 \times 10^{-48}}\, {\hbox {cm}}^{2}$$ 1.4 × 10 - 48 cm 2 for a WIMP mass of $${40}\, \hbox {GeV}/{\hbox {c}}^{2}$$ 40 GeV / c 2 and a $${1000}\, \hbox {days}$$ 1000 days exposure. LZ achieves this sensitivity through a combination of a large $${5.6}\, \hbox {t}$$ 5.6 t fiducial volume, active inner and outer veto systems, and radio-pure construction using materials with inherently low radioactivity content. The LZ collaboration performed an extensive radioassay campaign over a period of six years to inform material selection for construction and provide an input to the experimental background model against which any possible signal excess may be evaluated. The campaign and its results are described in this paper. We present assays of dust and radon daughters depositing on the surface of components as well as cleanliness controls necessary to maintain background expectations through detector construction and assembly. Finally, examples from the campaign to highlight fixed contaminant radioassays for the LZ photomultiplier tubes, quality control and quality assurance procedures through fabrication, radon emanation measurements of major sub-systems, and bespoke detector systems to assay scintillator are presented.
Published: 2020
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4. A high precision calibration of the nonlinear energy response at Daya Bay

Author: X. L. Ji, E. Naumova, D. A. Dwyer, T. J. Langford, L. Mora Lepin, H. M. Steiner, Y. Q. Ma, Xiao-yan Li, J. J. Cherwinka, N. Raper, Rupert Leitner, A. Higuera, Zhi-zhong Xing, Qinglong Wu, Kam Biu Luk, Christopher G. White, M. Qi, Tian Xue, J. L. Sun, S. H. Kettell, Artem Chukanov, X. B. Ma, Y. K. Heng, K. Whisnant, C. Li, Lawrence Pinsky, Jinjuan Ren, J. Park, Q. J. Li, Y. Z. Yang, X.F. Zhang, Tao Hu, N. Y. Wang, B. Viren, Maxim Gonchar, L. H. Wei, R. T. Lei, Qingmin Zhang, F. S. Deng, R. A. Johnson, Jiawen Zhang, J. H. C. Lee, Guanghua Gong, C. C. Zhang, Minfang Yeh, B. Z. Hu, Wei Wang, S. J. Patton, Lei Zhou, B. R. Littlejohn, Jia Xu, Yufeng Li, Y. M. Zhang, Jim Napolitano, Hongzhao Yu, K. L. Jen, Bing-Lin Young, Jianrun Hu, J. P. Cummings, Z. Guo, L. Guo, Y. Chang, Patrick Huber, Hanxiong Huang, L. Kang, Jun Cheng, Chao Zhang, X. T. Zhang, Baobiao Yue, H. L. Zhuang, Alexander Olshevskiy, J. K. C. Leung, Guey-Lin Lin, Honghan Gong, Shanfeng Li, Jonathan S. Lu, Yaoyu Zhang, Y. B. Huang, E. T. Worcester, F. Z. Qi, Vit Vorobel, Shengxin Lin, H. H. Zhang, Wei Li, S. Jetter, Yi Chen, Yunzhe Liu, Yuhang Guo, Siew Cheng Wong, N. Dash, K. T. McDonald, W. H. Tse, D. C. Jones, Meng Ye, Christopher L. Marshall, J. F. Chang, Jiaheng Zou, Y. K. Hor, J. J. Ling, D. A. Martinez Caicedo, Zhiyong Zhang, B. Roskovec, Zhijian Zhang, Zhibing Li, A. B. Balantekin, Richard Rosero, Z. M. Wang, H. R. Band, Changgen Yang, Jianglai Liu, X. C. Ruan, Mengsu Yang, K. Treskov, X. H. Guo, M. Dvořák, Feiyang Zhang, H. R. Pan, Michael Kramer, V. Pec, L. Lebanowski, Y. Y. Ding, C. Lu, Rui Zhang, S. Hans, R. G. Wang, Xingtao Huang, Simon Blyth, Yixue Chen, M. Z. Wang, Ming Chung Chu, R. W. Hackenburg, Chun S. J. Pun, Liang Zhan, M. Bishai, F. P. An, D. M. Xia, Z. Wang, Zhuojun Hu, K. M. Heeger, Changjian Lin, Shaomin Chen, Jun Cao, Xiaolu Ji, L. S. Littenberg, Z. K. Cheng, Z. P. Zhang, S. F. Li, Y. X. Zhang, W. J. Wu, Dmitry V. Naumov, D. Adey, L. W. Koerner, X. Wang, R. D. McKeown, D. Cao, D. E. Jaffe, C. E. Tull, Miao He, Haoqi Lu, Y. F. Wang, Haosheng Chen, J. M. Link, Yanlin Liu, Hongliang Li, Jing Wang, S. K. Lin, Hai Liang, Liangjian Wen, Guofu Cao, Jingyuan Guo, Juan Pedro Ochoa-Ricoux, Jen-Chieh Peng, Xiaohui Qian, J. Lee, H. Y. Wei, J. Dove, Yuda Zeng, S. Zeng, H. L. H. Wong, Yuman Wang, W. Q. Gu, Zeyuan Yu, S. Kohn, Chunjie Wang, M. V. Diwan, X. Q. Li, Tadeas Dohnal, Lin Yang, Jinmei Liu, Jing Zhao, S. Li, X. Y. Ma, I. Mitchell, Y. B. Hsiung, and Feng Li
Subjects: Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Scintillation counter, Detector, Calibration, Daya Bay Reactor Neutrino Experiment, Neutrino, Scintillator, Kinetic energy, Instrumentation, Energy (signal processing), Computational physics
Abstract: A high precision calibration of the nonlinearity in the energy response of the Daya Bay Reactor Neutrino Experiment’s antineutrino detectors is presented in detail. The energy nonlinearity originates from the particle-dependent light yield of the scintillator and charge-dependent electronics response. The nonlinearity model is constrained by γ calibration points from deployed and naturally occurring radioactive sources, the β spectrum from ^(12)B decays, and a direct measurement of the electronics nonlinearity with a new flash analog-to-digital converter readout system. Less than 0.5% uncertainty in the energy nonlinearity calibration is achieved for positrons of kinetic energies greater than 1 MeV.
Published: 2019
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5. Antineutrino Energy Spectrum Unfolding Based on the Daya Bay Measurement and Its Applications

Author: Jinjuan Ren, Dmitry Dolzhikov, Haifeng Li, Yuman Wang, S. Zeng, W. Q. Gu, Z. M. Wang, X. L. Ji, Minfang Yeh, Y. X. Zhang, C. Morales Reveco, Michael Kramer, Yufeng Li, K. L. Jen, Tomas Tmej, J. P. Gallo, Chun S. J. Pun, Zhuojun Hu, Shaomin Chen, Jun Cao, Haifeng Yao, J. J. Cherwinka, S. F. Li, Bangzheng Ma, Dmitry V. Naumov, Yinhong Zhang, Yongzhu Chen, Yue Meng, Q. J. Li, H. R. Pan, Kam-Biu Luk, N. Raper, H. Liang, Yixue Chen, Hongzhao Yu, Olivia Dalager, Z. Guo, D. C. Jones, Hanxiong Huang, L. Kang, N. Y. Wang, B. Viren, X. T. Huang, Tianpeng Xu, A. B. Balantekin, C. G. Yang, Zhi-zhong Xing, Baobiao Yue, W. J. Wu, Y. Z. Yang, R. D. McKeown, C. E. Tull, S. Kohn, L. H. Wei, Rong Zhao, R. T. Lei, F. Li, Simon Blyth, R. C. Mandujano, Guanghua Gong, Li Zhou, S. Hans, M. Z. Wang, Ming Chung Chu, W. H. Tse, Diru Wu, M. Ye, Jingyuan Guo, Chi Lin, K. T. McDonald, F. L. Wu, Jen-Chieh Peng, Y. K. Hor, Jianrun Hu, Qinglong Wu, Junwei Huang, Jianglai Liu, J. Dove, Yuda Zeng, J. M. Link, J. P. Cummings, L. Guo, Alexander Olshevskiy, M. Qi, Tian Xue, M. Bishai, Chao Zhang, S. J. Patton, Y. K. Heng, H. S. Chen, Xiaohui Qian, J. Lee, H. Y. Wei, K. M. Heeger, Zhijian Zhang, Rupert Leitner, L. S. Littenberg, H. L. H. Wong, H. H. Zhang, H. L. Zhuang, K. Treskov, Richard Rosero, Juan Pedro Ochoa-Ricoux, X. Wang, J. J. Ling, B. R. Littlejohn, M. Grassi, D. E. Jaffe, Miao He, E. Naumova, D. A. Dwyer, B. Z. Hu, Haoqi Lu, T. J. Langford, Ruhui Li, Yaoyu Zhang, Y. B. Huang, Vitalii Zavadskyi, Y. F. Wang, Y. H. Chang, Vit Vorobel, S. Zhang, Jing Wang, T. Hu, Xiaolu Ji, Wei Li, H. M. Steiner, R. W. Hackenburg, Y. Q. Ma, Z. Wang, Honghan Gong, K. Whisnant, Zhiyong Zhang, J. Cheng, Yuhang Guo, B. Roskovec, Jiaheng Zou, D. M. Xia, F. S. Deng, Bing-Lin Young, Liangjian Wen, Guofu Cao, X. C. Ruan, Z. K. Cheng, Z. P. Zhang, Jianmin Li, Y. Y. Ding, Fengpeng An, Zhangquan Xie, Qingmin Zhang, Jim Napolitano, W. Wang, Y. B. Hsiung, Z. Y. Yu, M. V. Diwan, X. Q. Li, H. K. Xu, Patrick Huber, Tadeas Dohnal, J. L. Sun, X. T. Zhang, J. Park, T. M. T. Nguyen, J. H. C. Lee, Z. B. Li, Shengxin Lin, E. T. Worcester, Lin Yang, F. Z. Qi, Jinmei Liu, Jing Zhao, X. Y. Ma, Christopher L. Marshall, J. F. Chang, X. H. Guo, Jiawen Zhang, M. Dvořák, C. H. Wang, R. G. Wang, Feiyang Zhang, Liang Zhan, Christopher G. White, C. Lu, J. L. Xu, Shanfeng Li, Guey-Lin Lin, Jian Liu, J. K. C. Leung, S. H. Kettell, X. B. Ma, Maxim Gonchar, Xinglong Li, and R. A. Johnson
Subjects: Physics, Nuclear and High Energy Physics, Isotope, Fissile material, 010308 nuclear & particles physics, Fission, Detector, FOS: Physical sciences, Astronomy and Astrophysics, 01 natural sciences, Spectral line, Physics::Geophysics, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Inverse beta decay, 0103 physical sciences, Energy spectrum, High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment, Instrumentation, Energy (signal processing)
Abstract: The prediction of reactor antineutrino spectra will play a crucial role as reactor experiments enter the precision era. The positron energy spectrum of 3.5 million antineutrino inverse beta decay reactions observed by the Daya Bay experiment, in combination with the fission rates of fissile isotopes in the reactor, is used to extract the positron energy spectra resulting from the fission of specific isotopes. This information can be used to produce a precise, data-based prediction of the antineutrino energy spectrum in other reactor antineutrino experiments with different fission fractions than Daya Bay. The positron energy spectra are unfolded to obtain the antineutrino energy spectra by removing the contribution from detector response with the Wiener-SVD unfolding method. Consistent results are obtained with other unfolding methods. A technique to construct a data-based prediction of the reactor antineutrino energy spectrum is proposed and investigated. Given the reactor fission fractions, the technique can predict the energy spectrum to a 2% precision. In addition, we illustrate how to perform a rigorous comparison between the unfolded antineutrino spectrum and a theoretical model prediction that avoids the input model bias of the unfolding method., 22 pages, 10 figures, 6 supplemental materials
Published: 2021

6. The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs

Author: Mikkel B. Johnson, B. Landerud, A. Biekert, B. N. Edwards, K. Hanzel, T. E. Tope, D. Curran, C. Chiller, J. Palmer, R. Leonard, P. Sutcliffe, E. D. Fraser, R. Bunker, J. So, A. A. Chiller, M. R. While, A. Dobi, D. Hamilton, M. G. D. van der Grinten, W. J. Wisniewski, J. Li, A. Fan, J.S. Saba, C. Lynch, Henrique Araujo, S. Luitz, J. Nesbit, M. Horn, C. D. Kocher, Catarina Silva, F. G. O’Neill, J. C. Davis, J. J. Silk, M. C. Carmona-Benitez, Simon Fayer, M. Pangilinan, K. O’Sullivan, D. Lucero, Q. Xiao, D. Hemer, B. Boxer, J. M. Lyle, C. Chan, C. E. Tull, J. Genovesi, A. Vaitkus, M. Arthurs, V. B. Francis, S. Kravitz, X. Liu, H. J. Birch, R. Linehan, S. Walcott, C. H. Faham, T. J. Anderson, A. B.M.R. Sazzad, D. White, A. Kamaha, M. S. Witherell, R. Studley, K. Sundarnath, R. Liu, H. Oh, L. Korley, H. Flaecher, R. Conley, K. Kamdin, P. Beltrame, S. Stephenson, C. Pereira, C. R. Hall, R. Cabrita, B. Holbrook, B. G. Lenardo, P. Majewski, T.M. Stiegler, I. B. Peterson, A. Manalaysay, A. Monte, C. Ghag, H. Kraus, C. Loniewski, J. Makkinje, X. Xiang, Robert A. Taylor, M. N. Irving, S. Uvarov, Michael Schubnell, J. Heise, R. Coughlen, A. Lambert, F. Froborg, L. Oxborough, D.C. Malling, S. Greenwood, J. Yin, S. J. Haselschwardt, H. J. Krebs, W. H. Lippincott, K. J. Palladino, R. E. Smith, V. A. Kudryavtsev, I. Olcina, C. M. Ignarra, A. Harrison, A. J. Bailey, Minfang Yeh, D. Bauer, W. Skulski, J. Keefner, O. Hitchcock, Ben Carlson, E. Leason, Benjamin Krikler, A. Cottle, E. Mizrachi, Michele Cascella, M. Khaleeq, M. Solmaz, T. J. Whitis, J. J. Wang, N. Angelides, S. Gokhale, K. Skarpaas, Daniel McKinsey, S. Dardin, S. Kyre, D. Santone, P. R. Scovell, T. Vietanen, S. Powell, Y. Wang, David Leonard, E. Morrison, N. Swanson, M. Sarychev, M. A. Olevitch, E. K. Pease, M. Elnimr, P. Brás, N.J. Gantos, R. G. Jacobsen, J. Migneault, Yeongduk Kim, W. Turner, S. D. Worm, Seth Hillbrand, T. Fruth, G. Gregerson, Wenzhao Wei, V. Kasey, L. Kreczko, J. R. Watson, A. Bhatti, D. Naim, Ethan Bernard, B. J. Mount, V. N. Solovov, C. Nedlik, K. Wilson, Elena Korolkova, G. R. C. Rischbieter, P. Ford, A. Stevens, D. J. Taylor, H. N. Nelson, F. Neves, S. Aviles, W. T. Emmet, K. Stifter, B. Birrittella, J. T. White, S. J. Patton, D. Molash, M. Severson, T. A. Shutt, A. Richards, D Kodroff, J. Lin, Kareem Kazkaz, T. P. Biesiadzinski, David Colling, J. Liao, J. Mock, J. A. Morad, E. Holtom, J. E. Y. Dobson, Bjoern Penning, C. E. Dahl, A. Dushkin, A. Konovalov, D. J. Markley, G. W. Shutt, N. Parveen, M. G. D. Gilchriese, Yanwen Liu, C. Carels, Martin Breidenbach, Kathrin C. Walker, V.V. Sosnovtsev, A. Naylor, K. T. Lesko, N. A. Larsen, C. Lee, A. Pagac, J. J. Cherwinka, N. Decheine, J. Bang, J. A. Nikoleyczik, Patrick Bauer, J.P. Rodrigues, S. Branson, T. J. R. Davison, B. Lopez Paredes, D. Pagenkopf, J. S. Campbell, M. Tan, K. C. Oliver-Mallory, M.J. Barry, J. Belle, D. Yu. Akimov, M. Timalsina, S. Shaw, Alexander Bolozdynya, W. Ji, Sridhara Dasu, D. Q. Huang, J. Edwards, F. L. H. Wolfs, K. E. Boast, J. Busenitz, Ren-Jie Wang, S. Fiorucci, N. Stern, C. Rhyne, V. Bugaev, A. Laundrie, G. Rutherford, G. Pereira, E. H. Miller, W. W. Craddock, S. Alsum, J.P. da Cunha, Richard J. Smith, A. Cole, W. Wang, Julie Harrison, I. Khurana, M. Utes, R. J. Gaitskell, J. Kras, D. Khaitan, R. L. Mannino, J. D. Wolfs, H. Auyeung, L. de Viveiros, E. Voirin, E. M. Boulton, N. I. Chott, I. Stancu, L. Tvrznikova, Richard Rosero, P. MarrLaundrie, D. R. Tronstad, T. Benson, Dongming Mei, T. J. Sumner, O. Jahangir, J. Va’vra, Ross G. White, L. Sabarots, A. Currie, A. R. Smith, W. L. Waldron, J. P. Coleman, E. Lopez-Asamar, Wolfgang Lorenzon, A. Piepke, Carl Gwilliam, S. Hans, T. Harrington, Laura Manenti, A. Greenall, F.-T. Liao, G. Cox, J. R. Bensinger, V. M. Gehman, H. J. Rose, Christopher Brew, X. Bai, P. Sorensen, A. Arbuckle, Y. Qie, R. C. Webb, R.M. Gerhard, T.W. Hurteau, K.J. Thomas, P. Rossiter, C. Hasselkus, W. G. Jones, J. Johnson, R. Gelfand, T. G. Gonda, C. O. Vuosalo, A. St. J. Murphy, Adam Bernstein, Chao Zhang, A. Nilima, R. M. Preece, T. K. Edberg, Q. Riffard, B. P. Tennyson, Yue Meng, C. Maupin, J. E. Cutter, J. Reichenbacher, J.Y-K. Hor, N. Marangou, D. Temples, Eli Gibson, M. Hoff, H. S. Lee, J. H. Buckley, Z. J. Minaker, M.I. Lopes, M. Koyuncu, P. A. Terman, J.R. Verbus, Bhawna Gomber, J. A. Nikkel, A. Alquahtani, I. M. Fogarty Florang, D. Seymour, A. V. Kumpan, Antonin Vacheret, C. Hjemfelt, M.R. Stark, S. Pierson, M. Racine, D. R. Tiedt, D. S. Akerib, A. Khazov, W. C. Taylor, J. Balajthy, A.V. Khromov, A. C. Kaboth, V. M. Palmaccio, Duncan Carlsmith, K. Pushkin, S. A. Hertel, S. N. Jeffery, E. Druszkiewicz, R. W. Schnee, S. Pal, R. Bramante, B. N. Ratcliff, M. E. Monzani, J. O'Dell, P. Zarzhitsky, L. Wang, P. Johnson, Matthew Szydagis, W. H. To, J. E. Armstrong, U. Utku, Mani Tripathi, D. Woodward, D. Garcia, W. R. Edwards, Carl W. Akerlof, Jilei Xu, C. Nehrkorn, Ian S. Young, J. McLaughlin, J. Thomson, S. R. Eriksen, R. Rucinski, T.J. Martin, C. Levy, Sergey Burdin, A. Baxter, A. Lindote, L. Reichhart, Juhyeong Lee, S. Balashov, C. T. McConnell, M. F. Marzioni, A. Tomás, W. T. Kim, S. Weatherly, and Science and Technology Facilities Council (STFC)
Subjects: BACKGROUNDS, Particle physics, Photomultiplier, Physics - Instrumentation and Detectors, Physics and Astronomy (miscellaneous), FOS: Physical sciences, lcsh:Astrophysics, Scintillator, 01 natural sciences, High Energy Physics - Experiment, Physics, Particles & Fields, High Energy Physics - Experiment (hep-ex), WIMP, lcsh:QB460-466, 0103 physical sciences, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Gamma spectroscopy, Sensitivity (control systems), 010306 general physics, DETECTOR, physics.ins-det, 0206 Quantum Physics, Engineering (miscellaneous), Physics, Science & Technology, hep-ex, 010308 nuclear & particles physics, Scattering, IMPURITIES, Instrumentation and Detectors (physics.ins-det), Nuclear & Particles Physics, Physical Sciences, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, Content (measure theory), lcsh:QC770-798, CONSTRUCTION MATERIALS
Abstract: LUX-ZEPLIN (LZ) is a second-generation direct dark matter experiment with spin-independent WIMP-nucleon scattering sensitivity above $1.4 \times 10^{-48}$ cm$^{2}$ for a WIMP mass of 40 GeV/c$^{2}$ and a 1000 d exposure. LZ achieves this sensitivity through a combination of a large 5.6 t fiducial volume, active inner and outer veto systems, and radio-pure construction using materials with inherently low radioactivity content. The LZ collaboration performed an extensive radioassay campaign over a period of six years to inform material selection for construction and provide an input to the experimental background model against which any possible signal excess may be evaluated. The campaign and its results are described in this paper. We present assays of dust and radon daughters depositing on the surface of components as well as cleanliness controls necessary to maintain background expectations through detector construction and assembly. Finally, examples from the campaign to highlight fixed contaminant radioassays for the LZ photomultiplier tubes, quality control and quality assurance procedures through fabrication, radon emanation measurements of major sub-systems, and bespoke detector systems to assay scintillator are presented., Comment: 45 pages (79 inc. tables), 7 figures, 9 tables
Published: 2020
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7. Improved Constraints on Sterile Neutrino Mixing from Disappearance Searches in the MINOS, MINOS+ , Daya Bay, and Bugey-3 Experiments

Author: J. L. Sun, E. T. Worcester, F. Z. Qi, Jingyuan Guo, X. H. Guo, M. Dvořák, C. H. Wang, Feiyang Zhang, Richard Rosero, Jen-Chieh Peng, X. L. Ji, J. Park, J. H. C. Lee, J. P. Gallo, Miao He, A. E. Kreymer, S. V. Cao, J. Dove, Yuda Zeng, P. Lucas, Marvin L Marshak, Shanfeng Li, Chun S. J. Pun, Zhuojun Hu, D. C. Jones, Li Zhou, Christopher L. Marshall, J. F. Chang, A. B. Balantekin, Diru Wu, N. Poonthottathil, Yunzhe Liu, D. M. Xia, Shaomin Chen, Jun Cao, R. Chen, N. Graf, Y. Y. Ding, S. Hans, C. Lu, J. L. Xu, Rakesh Sharma, R. W. Hackenburg, S. R. Hahn, Haifeng Yao, S. Childress, S. H. Kettell, X. B. Ma, A. Aurisano, Honghan Gong, Maxim Gonchar, Xinglong Li, Z. Wang, S. F. Li, R. A. Johnson, H. H. Zhang, Jiawen Zhang, Fengpeng An, Yuhang Guo, Alexander Olshevskiy, Siew Cheng Wong, H. R. Band, Guey-Lin Lin, Jonathan S. Lu, Dmitry V. Naumov, Lin Yang, J. K. Nelson, D. E. Jaffe, H. Liang, Yixue Chen, G. B. Mills, Z. Y. Yu, Z. K. Cheng, K. Whisnant, J. J. Ling, Karol Lang, Z. P. Zhang, J. R. Meier, Jinmei Liu, Simon Blyth, J. Cheng, M. Kordosky, Jing Zhao, S. Li, X. Y. Ma, R. Mehdiyev, S. J. Patton, J. Schneps, Andrew Blake, M. Z. Wang, Ming Chung Chu, Zhangquan Xie, H. L. Zhuang, Michael Kramer, I. Anghel, A. Timmons, C. Morales Reveco, F. L. Wu, Y. X. Zhang, M. M. Pfützner, R. K. Plunkett, Yufeng Li, K. L. Jen, Ž. Pavlović, W. J. Wu, Vit Vorobel, R. D. McKeown, Wei Li, Artem Chukanov, N. Dash, Yue Meng, P. Sail, M. V. Diwan, Zhiyong Zhang, B. Roskovec, John Evans, X. Q. Li, M. Qi, M. Bishai, Tadeas Dohnal, Hongzhao Yu, Jing Wang, A. Schreckenberger, Nasir Shaheed, Hanxiong Huang, Z. B. Li, Y. Z. Yang, L. Kang, Qingmin Zhang, J. K. C. Leung, Gregory J Pawloski, R. T. Lei, Hongliang Li, P. Gouffon, X. Qiu, M. Ye, W. Wang, B. Z. Hu, N. Y. Wang, M. A. Thomson, D. Naples, B. Viren, Jianrun Hu, Stanley G. Wojcicki, L. Guo, Zhijian Zhang, Jiachen Li, J. O'Connor, Alec Habig, Y. B. Hsiung, Chao Zhang, K. Grzelak, J. J. Cherwinka, Xiaolu Ji, Liangjian Wen, D. D. Phan, Guofu Cao, L. H. Wei, K. Treskov, N. Raper, Jinjuan Ren, Q. J. Li, W. A. Mann, R. Hatcher, R. A. Gomes, Jim Napolitano, N. Tagg, A. Radovic, Qinglong Wu, G.D. Barr, Junwei Huang, Kam Biu Luk, G. J. Feldman, Yinhong Zhang, Z. Guo, Tian Xue, A. Holin, Juergen Thomas, Y. K. Heng, K. T. McDonald, J. Todd, Yanhui Liu, A. C. Weber, A. Perch, X. C. Ruan, Xin Qian, Guanghua Gong, Joao A B Coelho, Chi Lin, Juan Pedro Ochoa-Ricoux, L. Mora Lepin, A. Higuera, X. T. Huang, C. G. Yang, H. R. Pan, Zhi-zhong Xing, S. De Rijck, C. E. Tull, D. Torretta, J. Lee, H. Y. Wei, H. L. H. Wong, J. Hartnell, H. S. Chen, T. J. Carroll, P. Adamson, Y. K. Hor, Jianglai Liu, L. W. Koerner, X. Wang, Haoqi Lu, Y. F. Wang, W. Flanagan, T. Tmej, S. Kohn, S. Germani, Warner A. Miller, R. Toner, E. Naumova, D. A. Dwyer, T. J. Langford, A. Sousa, Yuman Wang, S. Zeng, W. Q. Gu, H. M. Steiner, P. Vahle, Y. Q. Ma, F. S. Deng, Bing-Lin Young, B. R. Littlejohn, Yaoyu Zhang, Y. B. Huang, Patrick Huber, Y. H. Chang, X. T. Zhang, Shengxin Lin, C. M. Castromonte, T. Hu, D. A. Martinez Caicedo, Minfang Yeh, Yongzhu Chen, Baobiao Yue, F. Li, R. G. Wang, W. H. Tse, R. J. Nichol, N. Mayer, Liang Zhan, K. M. Heeger, Christopher G. White, S. C. Tognini, Rupert Leitner, D. Dolzhikov, T. Xu, J. M. Link, J. P. Cummings, mrow, Leigh H. Whitehead, M. Y. Gabrielyan, L. S. Littenberg, M. C. Sanchez, R. B. Pahlka, and Z. M. Wang
Subjects: Physics, Particle physics, Sterile neutrino, Muon, General Physics and Astronomy, 01 natural sciences, MiniBooNE, MINOS, 0103 physical sciences, Muon neutrino, Neutron, 010306 general physics, Electron neutrino, Mixing (physics)
Abstract: Searches for electron antineutrino, muon neutrino, and muon antineutrino disappearance driven by sterile neutrino mixing have been carried out by the Daya Bay and MINOS+ collaborations. This Letter presents the combined results of these searches, along with exclusion results from the Bugey-3 reactor experiment, framed in a minimally extended four-neutrino scenario. Significantly improved constraints on the θ_{μe} mixing angle are derived that constitute the most constraining limits to date over five orders of magnitude in the mass-squared splitting Δm_{41}^{2}, excluding the 90% C.L. sterile-neutrino parameter space allowed by the LSND and MiniBooNE observations at 90% CL_{s} for Δm_{41}^{2}
Published: 2020
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8. Search For Electron-Antineutrinos Associated With Gravitational-Wave Events GW150914, GW151012, GW151226, GW170104, GW170608, GW170814, and GW170817 at Daya Bay

Author: B. R. Littlejohn, Yaoyu Zhang, Y. B. Huang, J. P. Gallo, R. W. Hackenburg, Y. H. Chang, Z. Wang, Chun S. J. Pun, Zhuojun Hu, Shaomin Chen, Y. K. Hor, Jun Cao, Hongzhao Yu, Hanxiong Huang, L. Kang, Haifeng Yao, Jianglai Liu, S. F. Li, Dmitry V. Naumov, Xin Qian, Z. Y. Yu, S. J. Patton, K. Whisnant, J. Cheng, X. Wang, Haoqi Lu, A. Higuera, X. T. Huang, C. G. Yang, Olivia Dalager, M. V. Diwan, X. Q. Li, Tadeas Dohnal, J. K. C. Leung, X. C. Ruan, Zhi-zhong Xing, Z. B. Li, D. M. Xia, H. L. Zhuang, Y. F. Wang, Michael Kramer, E. T. Worcester, F. Z. Qi, S. H. Kettell, X. B. Ma, Jinjuan Ren, Christopher L. Marshall, J. F. Chang, Christopher G. White, H. R. Band, H. Liang, Yixue Chen, N. Y. Wang, B. Viren, Q. J. Li, Y. Z. Yang, L. H. Wei, H. S. Chen, R. T. Lei, W. J. Wu, R. D. McKeown, Qingmin Zhang, Maxim Gonchar, Xinglong Li, R. A. Johnson, X. L. Ji, Rupert Leitner, Z. M. Wang, D. E. Jaffe, Guanghua Gong, C. Lu, Chi Lin, Jim Napolitano, Jiawen Zhang, Jingyuan Guo, Jen-Chieh Peng, Jianrun Hu, Qinglong Wu, Yinhong Zhang, Z. Guo, J. J. Cherwinka, Li Zhou, J. Dove, Yuda Zeng, N. Raper, Tian Xue, Miao He, L. Guo, Xiaolu Ji, C. Morales Reveco, Chao Zhang, X. H. Guo, Guey-Lin Lin, Jonathan S. Lu, D. A. Martinez Caicedo, Jia Xu, Yufeng Li, Y. K. Heng, K. T. McDonald, M. Dvořák, C. H. Wang, Vit Vorobel, K. L. Jen, Tomas Tmej, Feiyang Zhang, Jianmin Li, M. Ye, Wei Li, S. Kohn, Y. Y. Ding, D. C. Jones, H. H. Zhang, R. G. Wang, A. B. Balantekin, Liang Zhan, F. L. Wu, Zhiyong Zhang, B. Roskovec, Fengpeng An, Tianpeng Xu, Patrick Huber, X. T. Zhang, Minfang Yeh, Shengxin Lin, Shanfeng Li, S. Hans, J. L. Sun, Juan Pedro Ochoa-Ricoux, J. Park, J. H. C. Lee, Alexander Olshevskiy, Yongzhu Chen, J. J. Ling, Baobiao Yue, Honghan Gong, Zhijian Zhang, J. Lee, H. Y. Wei, Yuhang Guo, H. L. H. Wong, Jiaheng Zou, K. Treskov, T. Hu, F. Li, Richard Rosero, W. H. Tse, H. R. Pan, C. E. Tull, Y. X. Zhang, K. M. Heeger, Yue Meng, Kam-Biu Luk, Simon Blyth, M. Z. Wang, Ming Chung Chu, Yuman Wang, S. Zeng, W. Q. Gu, M. Qi, M. Bishai, B. Z. Hu, F. S. Deng, Bing-Lin Young, Diru Wu, L. S. Littenberg, E. Naumova, D. A. Dwyer, W. Wang, T. J. Langford, Y. B. Hsiung, Lin Yang, Jinmei Liu, Jing Zhao, X. Y. Ma, H. M. Steiner, Y. Q. Ma, J. M. Link, J. P. Cummings, Jing Wang, Liangjian Wen, Guofu Cao, Z. K. Cheng, Z. P. Zhang, and Zhangquan Xie
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Nuclear and High Energy Physics, Range (particle radiation), Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Gravitational wave, FOS: Physical sciences, Astronomy and Astrophysics, Electron, Astrophysics, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, Spectral line, High Energy Physics - Experiment, Neutron star, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, GW151226, Monochromatic color, Neutrino, 010306 general physics, Astrophysics - High Energy Astrophysical Phenomena, Instrumentation
Abstract: Providing a possible connection between neutrino emission and gravitational-wave (GW) bursts is important to our understanding of the physical processes that occur when black holes or neutron stars merge. In the Daya Bay experiment, using data collected from December 2011 to August 2017, a search has been performed for electron-antineutrino signals coinciding with detected GW events, including GW150914, GW151012, GW151226, GW170104, GW170608, GW170814, and GW170817. We used three time windows of $\mathrm{\pm 10~s}$, $\mathrm{\pm 500~s}$, and $\mathrm{\pm 1000~s}$ relative to the occurrence of the GW events, and a neutrino energy range of 1.8 to 100 MeV to search for correlated neutrino candidates. The detected electron-antineutrino candidates are consistent with the expected background rates for all the three time windows. Assuming monochromatic spectra, we found upper limits (90% confidence level) on electron-antineutrino fluence of $(1.13~-~2.44) \times 10^{11}~\rm{cm^{-2}}$ at 5 MeV to $8.0 \times 10^{7}~\rm{cm^{-2}}$ at 100 MeV for the three time windows. Under the assumption of a Fermi-Dirac spectrum, the upper limits were found to be $(5.4~-~7.0)\times 10^{9}~\rm{cm^{-2}}$ for the three time windows., Comment: 16 pages, 12 figures, 9 tables
Published: 2020
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9. The LUX-ZEPLIN (LZ) Experiment

Author: P. Sorensen, J. C. Davis, J. J. Silk, M. C. Carmona-Benitez, E. Holtom, T. J. Anderson, A. B.M.R. Sazzad, V.V. Sosnovtsev, J. J. Cherwinka, V. B. Francis, A. Naylor, L. Korley, K. Kamdin, W. Craddock, P. Beltrame, X. Xiang, A. Manalaysay, P. R. Scovell, D. Q. Huang, Ethan Bernard, B. P. Tennyson, Yue Meng, I. B. Peterson, A. Cottle, A. Biekert, A. Kamaha, M. S. Witherell, R. Studley, M. E. Monzani, J. S. Campbell, Alexander Bolozdynya, C. Chiller, M. G. D. van der Grinten, Matthew Szydagis, C. O. Vuosalo, M. Tan, E. H. Miller, V. Bugaev, B. Boxer, R. Coughlen, J. Liao, I. Stancu, L. de Viveiros, P. MarrLaundrie, A. Lambert, L. Kreczko, J. R. Watson, Michael Schubnell, A. Piepke, S. Greenwood, J. P. Coleman, A. Geffre, D. Bauer, G. W. Shutt, W. H. Lippincott, Y. Qie, Dongming Mei, L. Sabarots, S. Hans, Bhawna Gomber, W. Skulski, J. A. Nikkel, S. A. Hertel, A. Arbuckle, F.-T. Liao, S. R. Eriksen, Daniel McKinsey, E. Druszkiewicz, Jilei Xu, P. Sutcliffe, H. J. Rose, C. Nehrkorn, K. T. Lesko, N. A. Larsen, C. Lee, B. Landerud, Martin Breidenbach, D. Molash, Candace Lynch, W. G. Jones, M. A. Olevitch, Ian S. Young, M. Sarychev, B. N. Edwards, A. Pagac, L. Tvrznikova, P. Ford, S. Luitz, T. J. R. Davison, D. Pagenkopf, P. Majewski, G. Gregerson, Chao Zhang, Mary Severson, A. Currie, Ross G. White, Carl Gwilliam, S. J. Patton, A. J. Bailey, David Colling, Minfang Yeh, K. Wilson, P. Rossiter, S. Alsum, G. Pereira, V. M. Gehman, A. Dushkin, I. Khurana, Richard J. Smith, Benjamin Krikler, N. Marangou, John Heise, C. Loniewski, J. Bang, J. A. Nikoleyczik, J. Belle, D. Yu. Akimov, E. Mizrachi, C. Levy, M. R. While, A. Dobi, H. N. Nelson, X. Bai, J. Johnson, J. O'Dell, W. T. Kim, S. Weatherly, L. Wang, P. Johnson, Elena Korolkova, S. Pierson, W. T. Emmet, K. Stifter, B. Birrittella, T. Tope, A. Richards, Yufeng Wang, Ren-Jie Wang, J. Genovesi, C. Maupin, Kathrin C. Walker, G. R. C. Rischbieter, Eli Gibson, Yeongduk Kim, W. Turner, S. D. Worm, E. M. Boulton, G. Rutherford, S. Kyre, J. Mock, Seth Hillbrand, D. White, Q. Xiao, Sridhara Dasu, R. Leonard, J. Y.K. Hor, B. Holbrook, C. Nedlik, S. Fiorucci, J. Keefner, J. Kras, J. Yin, F. Froborg, F. Neves, D. Khaitan, S. J. Haselschwardt, L. Oxborough, D.S. Hamilton, O. Hitchcock, J.P. da Cunha, J.S. Saba, Henrique Araujo, I. Olcina, David Leonard, A. Bhatti, U. Utku, W. J. Wisniewski, S. Powell, M. Pangilinan, F.L.H. Wolfs, J. Barthel, D. Naim, D. Hemer, M. Timalsina, B. J. Mount, T. A. Shutt, S. Shaw, J. A. Morad, N. Swanson, J.P. Rodrigues, J. Nesbit, W.L. Waldron, J. E. Y. Dobson, J. Busenitz, C. R. Hall, N. Stern, C. Rhyne, A. Cole, R. J. Gaitskell, T. K. Edberg, Q. Riffard, O. Jahangir, B. G. Lenardo, D. Temples, C. Chan, C. E. Tull, A. Vaitkus, D. Garcia, S. Kravitz, T. G. Gonda, M. Elnimr, K. Pushkin, M. Horn, Kareem Kazkaz, H. Kraus, J. Li, C. H. Faham, T.M. Stiegler, A. Monte, C. D. Kocher, T. P. Biesiadzinski, C. Ghag, J. E. Armstrong, H. S. Lee, W. R. Edwards, K. J. Palladino, T. Benson, J. H. Buckley, Z. J. Minaker, Carl W. Akerlof, R. Bunker, M. Solmaz, M. Koyuncu, J.R. Verbus, J. M. Lyle, C. E. Dahl, E. Morrison, J. E. Cutter, J. Reichenbacher, H.J. Krebs, J. So, S. Branson, Peter Bauer, H. Auyeung, D. Seymour, Michele Cascella, A. A. Chiller, Mani Tripathi, Richard Rosero, D. R. Tronstad, R. Liu, M. Khaleeq, N. Decheine, M. N. Irving, Yunpeng Liu, S. Uvarov, J. McLaughlin, A. R. Smith, S. Dardin, J. Thomson, K. Sundarnath, Robert A. Taylor, Ben Carlson, T. Harrington, C. T. McConnell, E. K. Pease, A. Greenall, T. J. Whitis, M. F. Marzioni, C. Silva, V. Kasey, D. Rynders, R. C. Webb, J. Palmer, P. Brás, V. N. Solovov, T.J. Martin, R. Conley, P. A. Terman, A. Tomás, B. Lopez Paredes, K. E. Boast, J. T. White, D. Markley, A. Konovalov, A. Lindote, A. Alquahtani, L. Reichhart, D.C. Malling, K. C. Oliver-Mallory, E. Leason, Juhyeong Lee, D. Curran, Henning Flaecher, S. Balashov, A.V. Khromov, B. N. Ratcliff, J. Migneault, A. V. Kumpan, Simon Fayer, Antonin Vacheret, C. Hjemfelt, R. Linehan, M. Arthurs, S. Stephenson, V. M. Palmaccio, N. I. Chott, M.R. Stark, Duncan Carlsmith, Wenzhao Wei, M. Utes, Laura Manenti, A. Stevens, D. J. Taylor, R. E. Smith, V. A. Kudryavtsev, S. Walcott, C. M. Ignarra, N.J. Gantos, R. G. Jacobsen, M. Racine, A. Fan, Bjoern Penning, J. Va’vra, A. Harrison, H. Oh, J. Makkinje, W. Ji, R. Rucinski, Sergey Burdin, A. Baxter, D. Santone, E. Voirin, R.M. Gerhard, T.W. Hurteau, K.J. Thomas, X. Liu, R. Gelfand, T. Vietanen, A. Nilima, R. M. Preece, A. Laundrie, Mikkel B. Johnson, K. Hanzel, F. G. O'Neill, A. Khazov, W. C. Taylor, J. Balajthy, M.J. Barry, K. O’Sullivan, D. Lucero, A. C. Kaboth, R. L. Mannino, J. D. Wolfs, J. Lin, C. Pereira, N. Angelides, S. Gokhale, A. St. J. Murphy, Adam Bernstein, M. Hoff, M.I. Lopes, M. G. D. Gilchriese, C. Carels, I. M. Fogarty Florang, J. Edwards, S. N. Jeffery, R. W. Schnee, S. Pal, R. Bramante, T. Fruth, T. J. Sumner, W. H. To, Wolfgang Lorenzon, J. R. Bensinger, J. J. Wang, D. Woodward, C. Hasselkus, K. Skarpaas, D. R. Tiedt, D. S. Akerib, and Science and Technology Facilities Council (STFC)
Subjects: Nuclear and High Energy Physics, Technology, Physics - Instrumentation and Detectors, 0299 Other Physical Sciences, Dark matter, FOS: Physical sciences, chemistry.chemical_element, Scintillator, 01 natural sciences, 7. Clean energy, Physics, Particles & Fields, High Energy Physics - Experiment, Nuclear physics, LEAD, High Energy Physics - Experiment (hep-ex), XENON, Low energy, Xenon, WIMP, 0103 physical sciences, 0201 Astronomical and Space Sciences, 010306 general physics, Nuclear Science & Technology, Underground, Instrumentation and Methods for Astrophysics (astro-ph.IM), Instrumentation, Instruments & Instrumentation, physics.ins-det, Physics, Dark matter detector, Time projection chamber, Science & Technology, 010308 nuclear & particles physics, hep-ex, Detector, Instrumentation and Detectors (physics.ins-det), Nuclear & Particles Physics, Neutron capture, Physics, Nuclear, chemistry, Physical Sciences, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, Liquid xenon, EMISSION, Astrophysics - Instrumentation and Methods for Astrophysics, astro-ph.IM
Abstract: We describe the design and assembly of the LUX-ZEPLIN experiment, a direct detection search for cosmic WIMP dark matter particles. The centerpiece of the experiment is a large liquid xenon time projection chamber sensitive to low energy nuclear recoils. Rejection of backgrounds is enhanced by a Xe skin veto detector and by a liquid scintillator Outer Detector loaded with gadolinium for efficient neutron capture and tagging. LZ is located in the Davis Cavern at the 4850' level of the Sanford Underground Research Facility in Lead, South Dakota, USA. We describe the major subsystems of the experiment and its key design features and requirements. info:eu-repo/semantics/publishedVersion
Published: 2019
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10. Extraction of the U235 and Pu239 Antineutrino Spectra at Daya Bay

Author: W. Wang, J. Park, Yuman Wang, S. Zeng, W. Q. Gu, Y. B. Hsiung, J. H. C. Lee, Hongzhao Yu, J. K. C. Leung, Minfang Yeh, Hanxiong Huang, L. Kang, V. Pec, S. Hans, Patrick Huber, S. H. Kettell, X. B. Ma, M. Qi, Yongzhu Chen, Alexander Olshevskiy, M. Bishai, Baobiao Yue, Jingyuan Guo, Jen-Chieh Peng, S. J. Patton, X. T. Zhang, Yunzhe Liu, J. Dove, Yuda Zeng, Miao He, H. H. Zhang, J. J. Ling, E. T. Worcester, M. V. Diwan, Shengxin Lin, Maxim Gonchar, Honghan Gong, F. Z. Qi, Michael Kramer, F. Li, B. Z. Hu, X. Q. Li, Xinglong Li, W. J. Wu, R. D. McKeown, H. L. Zhuang, R. A. Johnson, W. H. Tse, Vit Vorobel, Z. Y. Yu, Z. K. Cheng, Z. P. Zhang, D. C. Jones, Wei Li, A. B. Balantekin, Yuhang Guo, Y. Z. Yang, R. T. Lei, D. M. Xia, Siew Cheng Wong, Jiaheng Zou, Tadeas Dohnal, Jiawen Zhang, N. Dash, L. S. Littenberg, H. S. Chen, Y. X. Zhang, Yinhong Zhang, J. P. Cummings, Z. Guo, Jianrun Hu, Zhiyong Zhang, B. Roskovec, S. Kohn, X. C. Ruan, Rui Zhang, X. H. Guo, Xiaolu Ji, D. A. Martinez Caicedo, M. Dvořák, C. H. Wang, Feiyang Zhang, Kam-Biu Luk, K. M. Heeger, D. Cao, K. T. McDonald, Z. B. Li, J. J. Cherwinka, X. L. Ji, Richard Rosero, R. W. Hackenburg, D. E. Jaffe, Z. Wang, Yanhui Liu, N. Raper, Haifeng Li, E. Naumova, Juan Pedro Ochoa-Ricoux, Guey-Lin Lin, Jonathan S. Lu, Y. K. Hor, Lin Yang, J. M. Link, T. Hu, Y. Y. Ding, H. R. Band, Zhijian Zhang, Jianglai Liu, H. Liang, Yixue Chen, B. R. Littlejohn, K. Treskov, K. Whisnant, R. G. Wang, Shanfeng Li, J. Cheng, Jinmei Liu, Jing Zhao, Li Zhou, D. A. Dwyer, J. L. Sun, T. J. Langford, D. Adey, Yaoyu Zhang, Y. B. Huang, C. Li, Xin Qian, Liang Zhan, Simon Blyth, M. Z. Wang, S. Li, Ming Chung Chu, X. Y. Ma, Y. H. Chang, Guanghua Gong, Jing Wang, Chi Lin, L. Mora Lepin, Fengpeng An, Christopher L. Marshall, J. F. Chang, I. Mitchell, Artem Chukanov, Lawrence Pinsky, N. Y. Wang, B. Viren, Qingmin Zhang, A. Higuera, X. T. Huang, C. G. Yang, L. Guo, Zhi-zhong Xing, Chao Zhang, C. C. Zhang, L. H. Wei, Jinjuan Ren, Q. J. Li, Mengsu Yang, C. Lu, J. L. Xu, Christopher G. White, Qinglong Wu, Jim Napolitano, J. Lee, Tian Xue, Liangjian Wen, H. Y. Wei, Y. K. Heng, Guofu Cao, H. M. Steiner, H. L. H. Wong, Y. Q. Ma, H. R. Pan, C. E. Tull, F. S. Deng, M. Ye, Bing-Lin Young, Yufeng Li, K. L. Jen, Z. M. Wang, Chun S. J. Pun, Zhuojun Hu, Shaomin Chen, Jun Cao, S. F. Li, Dmitry V. Naumov, L. W. Koerner, X. Wang, Haoqi Lu, Y. F. Wang, Rupert Leitner, and X.F. Zhang
Subjects: Physics, Semileptonic decay, Isotope, Fission, General Physics and Astronomy, Inverse, 01 natural sciences, Spectral line, Nuclear physics, Inverse beta decay, 0103 physical sciences, 010306 general physics, Spectroscopy, Energy (signal processing)
Abstract: This Letter reports the first extraction of individual antineutrino spectra from ^{235}U and ^{239}Pu fission and an improved measurement of the prompt energy spectrum of reactor antineutrinos at Daya Bay. The analysis uses 3.5×10^{6} inverse beta-decay candidates in four near antineutrino detectors in 1958 days. The individual antineutrino spectra of the two dominant isotopes, ^{235}U and ^{239}Pu, are extracted using the evolution of the prompt spectrum as a function of the isotope fission fractions. In the energy window of 4-6 MeV, a 7% (9%) excess of events is observed for the ^{235}U (^{239}Pu) spectrum compared with the normalized Huber-Mueller model prediction. The significance of discrepancy is 4.0σ for ^{235}U spectral shape compared with the Huber-Mueller model prediction. The shape of the measured inverse beta-decay prompt energy spectrum disagrees with the prediction of the Huber-Mueller model at 5.3σ. In the energy range of 4-6 MeV, a maximal local discrepancy of 6.3σ is observed.
Published: 2019
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11. Improved measurement of the reactor antineutrino flux at Daya Bay

Author: Yinhong Zhang, J. P. Cummings, Z. Guo, X. L. Ji, H. S. Chen, K. T. McDonald, H. Y. Wei, F. S. Deng, Christopher L. Marshall, J. F. Chang, Jing Wang, S. K. Lin, F. Li, Z. K. Cheng, Z. P. Zhang, Y. Malyshkin, Liangjian Wen, Guofu Cao, Bing-Lin Young, W. H. Tse, C. Lu, T. Wise, M. Qi, J. J. Cherwinka, Li Zhou, Lin Yang, N. Raper, Jinmei Liu, Jing Zhao, S. Li, Jianglai Liu, X. Y. Ma, Yang Yang, H. R. Band, I. Mitchell, Yi Chen, Artem Chukanov, Michael Kramer, K. M. Heeger, Y. Chang, B. Z. Hu, Lawrence Pinsky, Chun S. J. Pun, Zhuojun Hu, Chang-Wei Loh, L. Mora Lepin, S. Kohn, Shanfeng Li, C. Li, H. Liang, Yixue Chen, S. J. Patton, Hongliang Li, L. Lebanowski, Y. Y. Ding, W. R. Edwards, Shaomin Chen, Jun Cao, Xiao-yan Li, A. Higuera, C. G. Yang, E. Naumova, D. A. Dwyer, W. Wang, J. M. Link, T. J. Langford, H. L. Zhuang, Rupert Leitner, Zhi-zhong Xing, Christopher G. White, Jinjuan Ren, Y. C. Lin, T. Hu, S. F. Li, Q. J. Li, Y. L. Chan, L. W. Koerner, H. M. Steiner, X.F. Zhang, X. Wang, M. Ye, Dmitry V. Naumov, Y. B. Hsiung, M. T. Yang, Haoqi Lu, Minfang Yeh, Y. F. Wang, Y. Q. Ma, M. V. Diwan, Honghan Gong, D. C. Jones, R. M. Qiu, X. Q. Li, Haijun Yang, Baobiao Yue, J. Park, B. R. Littlejohn, W. J. Wu, D. A. Martinez Caicedo, W. Gu, Jia Xu, Yufeng Li, K. L. Jen, Yuhang Guo, Siew Cheng Wong, A. B. Balantekin, R. D. McKeown, R. G. Wang, Jiaheng Zou, Z. M. Wang, Wenju Huo, N. Y. Wang, Liang Zhan, B. Viren, Patrick Huber, Yaoyu Zhang, Y. B. Huang, X. T. Zhang, Juan Pedro Ochoa-Ricoux, Shengxin Lin, Miao He, Yunzhe Liu, S. H. Kettell, X. B. Ma, Richard Rosero, Simon Blyth, M. Z. Wang, Ming Chung Chu, Maxim Gonchar, L. H. Wei, G. Hussain, R. A. Johnson, Yang Liu, Rui Zhang, Jiawen Zhang, J. H. C. Lee, Hongzhao Yu, Hanxiong Huang, L. Kang, K. Whisnant, Guey-Lin Lin, Jonathan S. Lu, J. Cheng, J. K. C. Leung, Chunjie Wang, Z. Y. Yu, R. W. Hackenburg, L. Guo, Qinglong Wu, Kam Biu Luk, H. H. Zhang, Tian Xue, Z. Wang, Chao Zhang, Y. K. Heng, Zhibing Li, Jen-Chieh Peng, H. R. Pan, J. Dove, X. C. Ruan, Guanghua Gong, C. E. Tull, Chi Lin, D. Adey, Xiaohui Qian, J. Lee, S. Zeng, M. Dolgareva, H. L. H. Wong, J. L. Sun, E. T. Worcester, F. Z. Qi, Xiaolu Ji, B. Roskovec, D. M. Xia, X. H. Guo, P. Zheng, Feiyang Zhang, Qingmin Zhang, D. Cao, R. T. Lei, D. E. Jaffe, Alexander Olshevskiy, Jim Napolitano, J. J. Ling, Zhijian Zhang, K. Treskov, F. P. An, Y. X. Zhang, C. C. Zhang, Xingtao Huang, M. Bishai, L. S. Littenberg, V. Pec, S. Hans, Mengsu Yang, Vit Vorobel, Wei Li, and Zhiyong Zhang
Subjects: Physics, Physics - Instrumentation and Detectors, hep-ex, 010308 nuclear & particles physics, Fission, Daya bay, Astrophysics::High Energy Astrophysical Phenomena, Analytical chemistry, FOS: Physical sciences, Flux, Instrumentation and Detectors (physics.ins-det), Detailed data, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Yield ratio, Neutron, High Energy Physics::Experiment, 010306 general physics, physics.ins-det
Abstract: This work reports a precise measurement of the reactor antineutrino flux using 2.2 million inverse beta decay (IBD) events collected with the Daya Bay near detectors in 1230 days. The dominant uncertainty on the neutron detection efficiency is reduced by 56% with respect to the previous measurement through a comprehensive neutron calibration and detailed data and simulation analysis. The new average IBD yield is determined to be $(5.91\pm0.09)\times10^{-43}~\rm{cm}^2/\rm{fission}$ with total uncertainty improved by 29%. The corresponding mean fission fractions from the four main fission isotopes $^{235}$U, $^{238}$U, $^{239}$Pu, and $^{241}$Pu are 0.564, 0.076, 0.304, and 0.056, respectively. The ratio of measured to predicted antineutrino yield is found to be $0.952\pm0.014\pm0.023$ ($1.001\pm0.015\pm0.027$) for the Huber-Mueller (ILL-Vogel) model, where the first and second uncertainty are experimental and theoretical model uncertainty, respectively. This measurement confirms the discrepancy between the world average of reactor antineutrino flux and the Huber-Mueller model., 10 pages, 9 figures, and 2 tables
Published: 2019

12. Extraction of the ^{235}U and ^{239}Pu Antineutrino Spectra at Daya Bay

Author: D, Adey, F P, An, A B, Balantekin, H R, Band, M, Bishai, S, Blyth, D, Cao, G F, Cao, J, Cao, J F, Chang, Y, Chang, H S, Chen, S M, Chen, Y, Chen, Y X, Chen, J, Cheng, Z K, Cheng, J J, Cherwinka, M C, Chu, A, Chukanov, J P, Cummings, N, Dash, F S, Deng, Y Y, Ding, M V, Diwan, T, Dohnal, J, Dove, M, Dvořák, D A, Dwyer, M, Gonchar, G H, Gong, H, Gong, W Q, Gu, J Y, Guo, L, Guo, X H, Guo, Y H, Guo, Z, Guo, R W, Hackenburg, S, Hans, M, He, K M, Heeger, Y K, Heng, A, Higuera, Y K, Hor, Y B, Hsiung, B Z, Hu, J R, Hu, T, Hu, Z J, Hu, H X, Huang, X T, Huang, Y B, Huang, P, Huber, D E, Jaffe, K L, Jen, X L, Ji, X P, Ji, R A, Johnson, D, Jones, L, Kang, S H, Kettell, L W, Koerner, S, Kohn, M, Kramer, T J, Langford, J, Lee, J H C, Lee, R T, Lei, R, Leitner, J K C, Leung, C, Li, F, Li, H L, Li, Q J, Li, S, Li, S C, Li, S J, Li, W D, Li, X N, Li, X Q, Li, Y F, Li, Z B, Li, H, Liang, C J, Lin, G L, Lin, S, Lin, J J, Ling, J M, Link, L, Littenberg, B R, Littlejohn, J C, Liu, J L, Liu, Y, Liu, Y H, Liu, C, Lu, H Q, Lu, J S, Lu, K B, Luk, X B, Ma, X Y, Ma, Y Q, Ma, C, Marshall, D A, Martinez Caicedo, K T, McDonald, R D, McKeown, I, Mitchell, L, Mora Lepin, J, Napolitano, D, Naumov, E, Naumova, J P, Ochoa-Ricoux, A, Olshevskiy, H-R, Pan, J, Park, S, Patton, V, Pec, J C, Peng, L, Pinsky, C S J, Pun, F Z, Qi, M, Qi, X, Qian, N, Raper, J, Ren, R, Rosero, B, Roskovec, X C, Ruan, H, Steiner, J L, Sun, K, Treskov, W-H, Tse, C E, Tull, B, Viren, V, Vorobel, C H, Wang, J, Wang, M, Wang, N Y, Wang, R G, Wang, W, Wang, X, Wang, Y, Wang, Y F, Wang, Z, Wang, Z M, Wang, H Y, Wei, L H, Wei, L J, Wen, K, Whisnant, C G, White, H L H, Wong, S C F, Wong, E, Worcester, Q, Wu, W J, Wu, D M, Xia, Z Z, Xing, J L, Xu, T, Xue, C G, Yang, L, Yang, M S, Yang, Y Z, Yang, M, Ye, M, Yeh, B L, Young, H Z, Yu, Z Y, Yu, B B, Yue, S, Zeng, Y, Zeng, L, Zhan, C, Zhang, C C, Zhang, F Y, Zhang, H H, Zhang, J W, Zhang, Q M, Zhang, R, Zhang, X F, Zhang, X T, Zhang, Y M, Zhang, Y X, Zhang, Y Y, Zhang, Z J, Zhang, Z P, Zhang, Z Y, Zhang, J, Zhao, L, Zhou, H L, Zhuang, and J H, Zou
Abstract: This Letter reports the first extraction of individual antineutrino spectra from ^{235}U and ^{239}Pu fission and an improved measurement of the prompt energy spectrum of reactor antineutrinos at Daya Bay. The analysis uses 3.5×10^{6} inverse beta-decay candidates in four near antineutrino detectors in 1958 days. The individual antineutrino spectra of the two dominant isotopes, ^{235}U and ^{239}Pu, are extracted using the evolution of the prompt spectrum as a function of the isotope fission fractions. In the energy window of 4-6 MeV, a 7% (9%) excess of events is observed for the ^{235}U (^{239}Pu) spectrum compared with the normalized Huber-Mueller model prediction. The significance of discrepancy is 4.0σ for ^{235}U spectral shape compared with the Huber-Mueller model prediction. The shape of the measured inverse beta-decay prompt energy spectrum disagrees with the prediction of the Huber-Mueller model at 5.3σ. In the energy range of 4-6 MeV, a maximal local discrepancy of 6.3σ is observed.
Published: 2019

13. Measurement of the Antineutrino Spectrum from U235 Fission at HFIR with PROSPECT

Author: D. Davee, G. Deichert, D. Norcini, Michael Febbraro, R. L. Varner, J. M. Minock, M. V. Diwan, Chao Zhang, M. P. Mendenhall, A. B. Hansell, X. Zhang, B. Viren, J. T. Matta, Hans P. Mumm, H. R. Band, B. T. Foust, A. Galindo-Uribarri, Anna Erickson, B. R. Littlejohn, J. Nikkel, J. Wilhelmi, Y-R Yen, D. C. Jones, J. Insler, J. J. Cherwinka, A. B. Balantekin, S. Nour, K. Gilje, T. Wise, C. E. Gilbert, P. T. Surukuchi, S. Hans, D. Berish, O. Kyzylova, K. M. Heeger, D. E. Jaffe, C. D. Bryan, M. J. Dolinski, E. Romero-Romero, Aiwu Zhang, A. J. Conant, R. Neilson, J. LaRosa, P. E. Mueller, M. A. Tyra, Richard Rosero, Jim Napolitano, Denis E. Bergeron, D. J. Dean, Dmitry A. Pushin, Minfang Yeh, C.D. Bass, R. D. McKeown, B. T. Hackett, Xin Lu, Andrew A. Cox, Xiaolu Ji, J. K. Gaison, J. P. Brodsky, Xin Qian, T. Classen, Dusan Sarenac, A. B. Telles, D. A. Martinez Caicedo, C. E. Lane, T. J. Langford, Christopher G. White, J. Ashenfelter, and Nathaniel Bowden
Subjects: Semileptonic decay, Physics, Fission, General Physics and Astronomy, chemistry.chemical_element, Inverse, Uranium, Enriched uranium, 01 natural sciences, 7. Clean energy, Nuclear physics, chemistry, 0103 physical sciences, 010306 general physics, Neutrino oscillation, Energy (signal processing), High Flux Isotope Reactor
Abstract: This Letter reports the first measurement of the ^{235}U ν[over ¯]_{e} energy spectrum by PROSPECT, the Precision Reactor Oscillation and Spectrum experiment, operating 7.9 m from the 85 MW_{th} highly enriched uranium (HEU) High Flux Isotope Reactor. With a surface-based, segmented detector, PROSPECT has observed 31678±304(stat) ν[over ¯]_{e}-induced inverse beta decays, the largest sample from HEU fission to date, 99% of which are attributed to ^{235}U. Despite broad agreement, comparison of the Huber ^{235}U model to the measured spectrum produces a χ^{2}/ndf=51.4/31, driven primarily by deviations in two localized energy regions. The measured ^{235}U spectrum shape is consistent with a deviation relative to prediction equal in size to that observed at low-enriched uranium power reactors in the ν[over ¯]_{e} energy region of 5-7 MeV.
Published: 2019
Full Text: View/download PDF

14. The Radioactive Source Calibration System of the PROSPECT Reactor Antineutrino Detector

Author: R. Rosero, Denis E. Bergeron, T. J. Langford, R. L. Varner, R. D. McKeown, Chao Zhang, M. P. Mendenhall, J. Ashenfelter, M. V. Diwan, Xin Qian, Nathaniel Bowden, X. Lu, Aiwu Zhang, J. Wilhelmi, D. A. Martinez Caicedo, D. Norcini, J. T. Matta, A. B. Telles, Y-R Yen, G. Deichert, C. D. Bass, M. J. Dolinski, Hans P. Mumm, Jim Napolitano, C.E. Gilbert, J. P. Brodsky, D. C. Jones, J. Insler, A. B. Balantekin, O. Kyzylova, J. J. Cherwinka, R. Neilson, A. B. Hansell, K. M. Heeger, P. E. Mueller, B. Hackett, H. R. Band, B. T. Foust, S. Hans, C. E. Lane, X. Zhang, Dmitry A. Pushin, A. Galindo-Uribarri, B. R. Littlejohn, E. Romero-Romero, J. LaRosa, D. E. Jaffe, Minfang Yeh, S. Nour, P. T. Surukuchi, J. A. Nikkel, Anna Erickson, T. Wise, D. Berish, Christopher G. White, T. Classen, Dusan Sarenac, M. A. Tyra, Michael Febbraro, B. Viren, C. D. Bryan, A. J. Conant, J. K. Gaison, and D. J. Dean
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, Radioactive source, Nuclear engineering, Detector, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Nuclear reactor, Oak Ridge National Laboratory, 7. Clean energy, 01 natural sciences, law.invention, Physics::Geophysics, law, Inverse beta decay, 0103 physical sciences, High Energy Physics::Experiment, Neutrino, 010306 general physics, Instrumentation, High Flux Isotope Reactor
Abstract: The Precision Reactor Oscillation and Spectrum (PROSPECT) Experiment is a reactor neutrino experiment designed to search for sterile neutrinos with a mass on the order of 1 eV/c$^2$ and to measure the spectrum of electron antineutrinos from a highly-enriched $^{235}$U nuclear reactor. The PROSPECT detector consists of an 11 by 14 array of optical segments in $^{6}$Li-loaded liquid scintillator at the High Flux Isotope Reactor in Oak Ridge National Laboratory. Antineutrino events are identified via inverse beta decay and read out by photomultiplier tubes located at the ends of each segment. The detector response is characterized using a radioactive source calibration system. This paper describes the design, operation, and performance of the PROSPECT source calibration system.
Published: 2019

15. Measurement of the Antineutrino Spectrum from ^{235}U Fission at HFIR with PROSPECT

Author: J, Ashenfelter, A B, Balantekin, H R, Band, C D, Bass, D E, Bergeron, D, Berish, N S, Bowden, J P, Brodsky, C D, Bryan, J J, Cherwinka, T, Classen, A J, Conant, A A, Cox, D, Davee, D, Dean, G, Deichert, M V, Diwan, M J, Dolinski, A, Erickson, M, Febbraro, B T, Foust, J K, Gaison, A, Galindo-Uribarri, C E, Gilbert, K E, Gilje, B T, Hackett, S, Hans, A B, Hansell, K M, Heeger, J, Insler, D E, Jaffe, X, Ji, D C, Jones, O, Kyzylova, C E, Lane, T J, Langford, J, LaRosa, B R, Littlejohn, X, Lu, D A, Martinez Caicedo, J T, Matta, R D, McKeown, M P, Mendenhall, J M, Minock, P E, Mueller, H P, Mumm, J, Napolitano, R, Neilson, J A, Nikkel, D, Norcini, S, Nour, D A, Pushin, X, Qian, E, Romero-Romero, R, Rosero, D, Sarenac, P T, Surukuchi, A B, Telles, M A, Tyra, R L, Varner, B, Viren, C, White, J, Wilhelmi, T, Wise, M, Yeh, Y-R, Yen, A, Zhang, C, Zhang, and X, Zhang
Abstract: This Letter reports the first measurement of the ^{235}U ν[over ¯]_{e} energy spectrum by PROSPECT, the Precision Reactor Oscillation and Spectrum experiment, operating 7.9 m from the 85 MW_{th} highly enriched uranium (HEU) High Flux Isotope Reactor. With a surface-based, segmented detector, PROSPECT has observed 31678±304(stat) ν[over ¯]_{e}-induced inverse beta decays, the largest sample from HEU fission to date, 99% of which are attributed to ^{235}U. Despite broad agreement, comparison of the Huber ^{235}U model to the measured spectrum produces a χ^{2}/ndf=51.4/31, driven primarily by deviations in two localized energy regions. The measured ^{235}U spectrum shape is consistent with a deviation relative to prediction equal in size to that observed at low-enriched uranium power reactors in the ν[over ¯]_{e} energy region of 5-7 MeV.
Published: 2019

16. Measurement of the Electron Antineutrino Oscillation with 1958 Days of Operation at Daya Bay

Author: Hongzhao Yu, Hanxiong Huang, L. Kang, J. K. C. Leung, Yanchu Wang, Li Zhou, Alexander Olshevskiy, D. Cao, S. H. Kettell, Miao He, J. J. Ling, S. J. Patton, D. E. Jaffe, Christopher G. White, X. B. Ma, Xingtao Huang, M. Bishai, Jinjuan Ren, Y. L. Chan, H. R. Band, H. Liang, Yixue Chen, H. L. Zhuang, S. Kohn, E. T. Worcester, M. Ye, Wenxiao Wang, Haifeng Li, F. Z. Qi, Jen-Chieh Peng, L. S. Littenberg, Juan Pedro Ochoa-Ricoux, T. Wise, Maxim Gonchar, Yanping Huang, R. T. Lei, Y. C. Lin, W. R. Edwards, D. Taychenachev, R. A. Johnson, G. Hussain, X. L. Ji, V. Vorobel, Jianrun Hu, Patrick Huber, X. Wang, Qingmin Zhang, Jiawen Zhang, Quanyin Li, Yinhong Zhang, Minfang Yeh, Chang-Wei Loh, B. R. Littlejohn, Xiaolu Ji, D. M. Xia, H. Y. Wei, F. S. Deng, X. T. Zhang, Z. Guo, B. Roskovec, R. Zhang, L. Lebanowski, Y. Y. Ding, Shengxin Lin, Z. K. Cheng, Z. P. Zhang, Jianglai Liu, Bing-Lin Young, Xiaohui Qian, D. Adey, Jim Napolitano, J. Lee, Honghan Gong, Yaoyu Zhang, Yang Yang, D. A. Martinez Caicedo, S. Zeng, M. Dolgareva, Michael Kramer, L. Mora Lepin, Y. H. Chang, E. Naumova, D. A. Dwyer, K. T. McDonald, H. L. H. Wong, T. J. Langford, Guey-Lin Lin, Jonathan S. Lu, Baobiao Yue, X.F. Zhang, Xiao-yan Li, A. Higuera, Zhi-zhong Xing, C. H. Wang, H. M. Steiner, X. C. Ruan, Huijun Zhang, P. Zheng, Feiyang Zhang, Haijun Yang, L. Guo, R. G. Wang, M. Qi, W. J. Wu, Siew Cheng Wong, R. D. McKeown, Ye Chen, Chao Zhang, J. Park, Liang Zhan, Changjian Lin, Yang Heng, Jiaheng Zou, Mengsu Yang, Haonan Lu, Shanfeng Li, H. R. Pan, T. Hu, Xiaohu Guo, M. T. Yang, J. H. C. Lee, B. Z. Hu, F. Li, Yunzhe Liu, C. E. Tull, W. H. Tse, Christopher L. Marshall, J. F. Chang, W. Gu, Z. Y. Yu, D. C. Jones, Zhibing Li, Yufeng Li, J. M. Link, J. P. Cummings, A. B. Balantekin, Rupert Leitner, Changgen Yang, K. M. Heeger, K. L. Jen, Jing Wang, C. Lu, J. L. Xu, Wenju Huo, S. K. Lin, Y. Malyshkin, Liangjian Wen, Guofu Cao, Qinglong Wu, Kam Biu Luk, Chun S. J. Pun, Artem Chukanov, Lawrence Pinsky, Zhuojun Hu, Shaomin Chen, Jun Cao, J. L. Sun, S. F. Li, Tian Xue, Y. X. Zhang, Simon Blyth, Dmitry V. Naumov, M. Z. Wang, Ming Chung Chu, C. Li, Richard Rosero, W. Tang, N. Y. Wang, B. Viren, L. H. Wei, Z. M. Wang, Yanhui Ma, K. Whisnant, J. Cheng, Yanlin Liu, Wei Li, Zhijian Zhang, K. Treskov, Zhiyong Zhang, F. P. An, C. C. Zhang, Hucheng Chen, V. Pec, S. Hans, R. W. Hackenburg, Z. Wang, Guanghua Gong, J. J. Cherwinka, N. Raper, L. W. Koerner, Yicheng Guo, Y. B. Hsiung, M. V. Diwan, R. M. Qiu, X. Q. Li, Lin Yang, Jinmei Liu, Jing Zhao, S. Li, X. Y. Ma, and I. Mitchell
Subjects: Physics, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Oscillation, hep-ex, Daya bay, General Physics and Astronomy, Inverse, FOS: Physical sciences, Daya Bay Reactor Neutrino Experiment, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, Spectral line, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, 010306 general physics, Electron neutrino, physics.ins-det, Energy (signal processing)
Abstract: We report a measurement of electron antineutrino oscillation from the Daya Bay Reactor Neutrino Experiment with nearly 4 million reactor $\overline{\nu}_{e}$ inverse beta decay candidates observed over 1958 days of data collection. The installation of a Flash-ADC readout system and a special calibration campaign using different source enclosures reduce uncertainties in the absolute energy calibration to less than 0.5% for visible energies larger than 2 MeV. The uncertainty in the cosmogenic $^9$Li and $^8$He background is reduced from 45% to 30% in the near detectors. A detailed investigation of the spent nuclear fuel history improves its uncertainty from 100% to 30%. Analysis of the relative $\overline{\nu}_{e}$ rates and energy spectra among detectors yields $\sin^{2}2\theta_{13} = 0.0856\pm 0.0029$ and $\Delta m^2_{32}=(2.471^{+0.068}_{-0.070})\times 10^{-3}~\mathrm{eV}^2$ assuming the normal hierarchy, and $\Delta m^2_{32}=-(2.575^{+0.068}_{-0.070})\times 10^{-3}~\mathrm{eV}^2$ assuming the inverted hierarchy., Comment: 6 pages, 4 figures, and 1 table. v4: the published version
Published: 2018

17. Seasonal variation of the underground cosmic muon flux observed at Daya Bay

Author: T. J. Langford, K. V. Tsang, H. M. Steiner, Y. Q. Ma, Artem Chukanov, Lawrence Pinsky, Michael Kramer, J. J. Cherwinka, Patrick Huber, S. J. Patton, W. Q. Gu, X. T. Zhang, Qinglong Wu, S. H. Kettell, X. B. Ma, Shengxin Lin, A. Khan, Tian Xue, W. J. Wu, Chang-Wei Loh, R. D. McKeown, Xiaohu Guo, Richard Rosero, L. Lebanowski, H. L. Zhuang, Y. K. Heng, Y. Y. Ding, M. Ye, T. Wise, J. F. Chang, M. Qi, Alexander Olshevskiy, M. T. Yang, Maxim Gonchar, D. C. Jones, D. Taychenachev, S. Hans, Changgen Yang, K. Whisnant, J. Cheng, E. T. Worcester, Y. Xu, E. C. Huang, A. B. Balantekin, G. Hussain, Y. Nakajima, H. S. Chen, C. Li, W. Tang, K. K. Kwan, Y. L. Chan, F. Z. Qi, Chun S. J. Pun, R. A. Johnson, M. W. Kwok, N. Y. Wang, C. Lu, B. Viren, J. J. Ling, Shaomin Chen, Jun Cao, N. Viaux, J. L. Xu, X. L. Ji, Christopher G. White, B. Z. Hu, Xin Qian, Jiawen Zhang, H. H. Zhang, Minfang Yeh, J. B. Jiao, Vit Vorobel, S. F. Li, W. R. Edwards, Guisen Li, Honghan Gong, Rupert Leitner, Zhijian Zhang, Z. Guo, Dmitry V. Naumov, H. R. Band, C. H. Wang, R. T. Lei, Hanxiong Huang, L. Kang, Xingtao Huang, Yang Yang, Y. C. Lin, B. Roskovec, Xiao-yan Li, K. Treskov, Wei Li, A. Higuera, S. Zeng, J. Park, Jen-Chieh Peng, Siew Cheng Wong, L. H. Whitehead, Zhi-zhong Xing, Z. Y. Yu, X. Wang, Li Zhou, H. Y. Wei, F. P. An, Wenju Huo, Yicheng Guo, K. T. McDonald, Haoqi Lu, H. Liang, Yixue Chen, Jiaheng Zou, Jinjuan Ren, D. A. Martinez Caicedo, M. Bishai, J. H. C. Lee, Haijun Yang, Q. J. Li, Dejun Li, Y. F. Wang, Yi Chen, Y. B. Hsiung, Shanfeng Li, Bing-Lin Young, J. Dove, B. R. Littlejohn, Wei Wang, C. C. Zhang, C. H. Wu, M. V. Diwan, L. S. Littenberg, R. M. Qiu, X. Q. Li, T. Kwok, Guey-Lin Lin, R. W. Hackenburg, R. G. Wang, Z. Wang, Simon Blyth, M. Z. Wang, Ming Chung Chu, Yufeng Li, K. L. Jen, N. Raper, Jonathan S. Lu, Z. Ye, Liang Zhan, Marco Grassi, Miao He, Y. X. Zhang, X. C. Ruan, Kam-Biu Luk, S. K. Lin, L. Guo, Y. H. Chang, F. Li, H. R. Pan, D. M. Xia, Chao Zhang, Z. B. Li, Zhiyong Zhang, S. Jetter, Y. Malyshkin, J. L. Sun, Lin Yang, Z. M. Wang, Jinmei Liu, C. Sebastiani, Liangjian Wen, Jing Zhao, X. Y. Ma, Guofu Cao, I. Mitchell, Jianglai Liu, S. Kohn, D. Cao, Guanghua Gong, C. E. Tull, Z. K. Cheng, Z. P. Zhang, D. E. Jaffe, Chi Lin, Juan Pedro Ochoa-Ricoux, Qingmin Zhang, Q. Y. Chen, Jim Napolitano, Y. M. Zhang, J. M. Link, J. P. Cummings, J. Lee, M. Dolgareva, H. L. H. Wong, Kwong Lau, K. M. Heeger, V. Pec, X. P. Ji, Mengsu Yang, J. K. Xia, T. Hu, H. Y. Ngai, R. L. Gill, E. Naumova, and D. A. Dwyer
Subjects: Physics - Instrumentation and Detectors, Correlation coefficient, Physics::Instrumentation and Detectors, cosmic ray experiments, neutrino detectors, neutrino experiments, Flux, FOS: Physical sciences, Atmospheric sciences, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, medicine, 010306 general physics, Physics, COSMIC cancer database, Muon, 010308 nuclear & particles physics, Astronomy and Astrophysics, Instrumentation and Detectors (physics.ins-det), Seasonality, Atmospheric temperature, medicine.disease, Overburden, Neutrino detector, High Energy Physics::Experiment
Abstract: The Daya Bay Experiment consists of eight identically designed detectors located in three underground experimental halls named as EH1, EH2, EH3, with 250, 265 and 860 meters of water equivalent vertical overburden, respectively. Cosmic muon events have been recorded over a two-year period. The underground muon rate is observed to be positively correlated with the effective atmospheric temperature and to follow a seasonal modulation pattern. The correlation coefficient $\alpha$, describing how a variation in the muon rate relates to a variation in the effective atmospheric temperature, is found to be $\alpha_{\text{EH1}} = 0.362\pm0.031$, $\alpha_{\text{EH2}} = 0.433\pm0.038$ and $\alpha_{\text{EH3}} = 0.641\pm0.057$ for each experimental hall., Comment: Updated to be identical to the published version
Published: 2018

18. Performance of a segmented $^{6}$Li-loaded liquid scintillator detector for the PROSPECT experiment

Author: Dmitry A. Pushin, M. A. Tyra, C. E. Lane, J. P. Brodsky, R. Rosero, Minfang Yeh, Denis E. Bergeron, T. J. Langford, Chao Zhang, M. P. Mendenhall, R. D. McKeown, A. B. Hansell, H. R. Band, S. Nour, Anna Erickson, J. Ashenfelter, D. Norcini, J. J. Cherwinka, T. Wise, D. Berish, K. Gilje, Hans P. Mumm, J. Wilhelmi, Christopher G. White, T. Classen, P. E. Mueller, M. V. Diwan, B. T. Foust, R. Neilson, D. Davee, Nathaniel Bowden, D. A. Martinez Caicedo, F. Lopez, B. Hackett, K. M. Heeger, Y-R Yen, Ke Han, Jim Napolitano, A. Galindo-Uribarri, B. R. Littlejohn, A. Bykadorova Telles, J. T. Matta, D. C. Jones, J. Insler, A. B. Balantekin, E. Romero-Romero, O. Kyzylova, S. Hans, P. T. Surukuchi, X. Zhang, K. Commeford, G. Deichert, D. E. Jaffe, Aiwu Zhang, J. A. Nikkel, C. D. Bass, M. J. Dolinski, J. M. Wagner, A. J. Conant, J. K. Gaison, B. Heffron, Xin Qian, C. Trinh, J. LaRosa, C. D. Bryan, and J. M. Minock
Subjects: Scintillation, Materials science, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Physics::Instrumentation and Detectors, Detector, Attenuation length, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Scintillator, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Neutron capture, High Energy Physics - Experiment (hep-ex), Optics, Recoil, Neutrino detector, 0103 physical sciences, Neutron detection, 010306 general physics, business, Instrumentation, Mathematical Physics
Abstract: This paper describes the design and performance of a 50 liter, two-segment $^{6}$Li-loaded liquid scintillator detector that was designed and operated as prototype for the PROSPECT (Precision Reactor Oscillation and Spectrum) Experiment. The two-segment detector was constructed according to the design specifications of the experiment. It features low-mass optical separators, an integrated source and optical calibration system, and materials that are compatible with the $^{6}$Li-doped scintillator developed by PROSPECT. We demonstrate a high light collection of 850$\pm$20 PE/MeV, an energy resolution of $\sigma$ = 4.0$\pm$0.2% at 1 MeV, and efficient pulse-shape discrimination of low $dE/dx$ (electronic recoil) and high $dE/dx$ (nuclear recoil) energy depositions. An effective scintillation attenuation length of 85$\pm$3 cm is measured in each segment. The 0.1% by mass concentration of $^{6}$Li in the scintillator results in a measured neutron capture time of $\tau$ = 42.8$\pm$0.2 $\mu s$. The long-term stability of the scintillator is also discussed. The detector response meets the criteria necessary for achieving the PROSPECT physics goals and demonstrates features that may find application in fast neutron detection., Comment: 16 pages, 13 figures; minor edits to design detail and references
Published: 2018
Full Text: View/download PDF

19. First search for short-baseline neutrino oscillations at HFIR with PROSPECT

Author: R. Neilson, Lindsey J. Bignell, D. E. Jaffe, J. A. Nikkel, J. J. Cherwinka, K. Gilje, C. E. Gilbert, D. Davee, R. L. Varner, A. Galindo-Uribarri, B. R. Littlejohn, Minfang Yeh, D. A. Martinez Caicedo, K. Koehler, C. D. Bryan, D. C. Jones, J. Insler, B. Heffron, H. R. Band, C. D. Bass, M. J. Dolinski, A. B. Hansell, A. B. Balantekin, O. Kyzylova, D. Norcini, A. Bykadorova Telles, R. Sharma, J. LaRosa, J. M. Wagner, C. E. Lane, B. T. Foust, C. Baldenegro, Xin Lu, G. Deichert, P. T. Surukuchi, D. J. Dean, H. Yao, Dusan Sarenac, Michael Febbraro, Ke Han, J. P. Brodsky, R. Rosero, J. Wilhelmi, Andrew A. Cox, M. V. Diwan, Jim Napolitano, Denis E. Bergeron, B. Viren, B. R. White, Aiwu Zhang, Hans P. Mumm, J. Bricco, R. D. McKeown, Chao Zhang, K. Commeford, M. P. Mendenhall, Christopher G. White, Wei Wang, J. T. Matta, T. Classen, F. Lopez, K. M. Heeger, X. Zhang, H. J. Miller, T. J. Langford, J. Ashenfelter, X. Ji, Nathaniel Bowden, S. Hans, B. Seilhan, Dmitry A. Pushin, Xin Qian, S. Nour, Anna Erickson, T. Wise, D. Berish, M. A. Tyra, P. E. Mueller, Y-R Yen, A. Glenn, B. T. Hackett, J. K. Gaison, M. Zhao, E. Romero-Romero, A. J. Conant, J. M. Minock, B. W. Goddard, and C. Trinh
Subjects: Physics, Fission products, Sterile neutrino, 010308 nuclear & particles physics, Fission, Oscillation, General Physics and Astronomy, FOS: Physical sciences, Scintillator, 01 natural sciences, High Energy Physics - Experiment, Physics::Geophysics, Nuclear physics, High Energy Physics - Experiment (hep-ex), Inverse beta decay, 0103 physical sciences, High Energy Physics::Experiment, Physics::Chemical Physics, 010306 general physics, Neutrino oscillation, High Flux Isotope Reactor
Abstract: This Letter reports the first scientific results from the observation of antineutrinos emitted by fission products of $^{235}$U at the High Flux Isotope Reactor. PROSPECT, the Precision Reactor Oscillation and Spectrum Experiment, consists of a segmented 4 ton $^6$Li-doped liquid scintillator detector covering a baseline range of 7-9 m from the reactor and operating under less than 1 meter water equivalent overburden. Data collected during 33 live-days of reactor operation at a nominal power of 85 MW yields a detection of 25461 $\pm$ 283 (stat.) inverse beta decays. Observation of reactor antineutrinos can be achieved in PROSPECT at 5$\sigma$ statistical significance within two hours of on-surface reactor-on data-taking. A reactor-model independent analysis of the inverse beta decay prompt energy spectrum as a function of baseline constrains significant portions of the previously allowed sterile neutrino oscillation parameter space at 95% confidence level and disfavors the best fit of the Reactor Antineutrino Anomaly at 2.2$\sigma$ confidence level., Comment: 7 pages, 5 figures; v3: Added additional supplemental files
Published: 2018
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20. The PROSPECT Reactor Antineutrino Experiment

Author: J. J. Cherwinka, Aiwu Zhang, K. Gilje, G. Deichert, C. Baldenegro, A. Galindo-Uribarri, B. R. Littlejohn, R. Sharma, P. T. Surukuchi, Wei Wang, E. Romero-Romero, D. Norcini, R. L. Varner, K. Commeford, B. Hackett, C. E. Lane, M. Zhao, Minfang Yeh, H. R. Band, A. B. Hansell, D. A. Martinez Caicedo, A. J. Conant, X. Lu, M. V. Diwan, J. M. Minock, B. T. Foust, J. Boyle, Christopher G. White, S. Nour, T. Classen, Anna Erickson, R. Rosero, B. W. Goddard, J. T. Matta, J. K. Gaison, C.E. Gilbert, H. J. Miller, A. Bykadorova Telles, T. Wise, T. J. Langford, D. Berish, Y-R Yen, Denis E. Bergeron, R. Neilson, D. J. Dean, A. Glenn, Michael Febbraro, J. Ashenfelter, R. D. McKeown, B. Viren, Lindsey J. Bignell, Jim Napolitano, J. Bricco, J. P. Brodsky, P. E. Mueller, D. E. Jaffe, M. A. Tyra, X. Ji, Nathaniel Bowden, X. Zhang, J. A. Nikkel, Ke Han, Chao Zhang, H. Yao, C. Trinh, M. P. Mendenhall, C. D. Bryan, K. Koehler, Hans P. Mumm, F. Lopez, D. C. Jones, J. Insler, K. M. Heeger, A. B. Balantekin, O. Kyzylova, Andrew A. Cox, B. R. White, D. Davee, Dusan Sarenac, J. LaRosa, C. D. Bass, M. J. Dolinski, B. Heffron, J. M. Wagner, Xin Qian, J. Wilhelmi, B. Seilhan, Dmitry A. Pushin, and S. Hans
Subjects: Physics, Nuclear and High Energy Physics, Sterile neutrino, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Oscillation, Physics::Instrumentation and Detectors, Detector, High Energy Physics::Phenomenology, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Parameter space, Scintillator, 01 natural sciences, 7. Clean energy, Physics::Geophysics, Nuclear physics, Inverse beta decay, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Neutrino oscillation, Instrumentation, High Flux Isotope Reactor
Abstract: The Precision Reactor Oscillation and Spectrum Experiment, PROSPECT, is designed to make both a precise measurement of the antineutrino spectrum from a highly-enriched uranium reactor and to probe eV-scale sterile neutrinos by searching for neutrino oscillations over meter-long baselines. PROSPECT utilizes a segmented $^6$Li-doped liquid scintillator detector for both efficient detection of reactor antineutrinos through the inverse beta decay reaction and excellent background discrimination. PROSPECT is a movable 4-ton antineutrino detector covering distances of 7m to 13m from the High Flux Isotope Reactor core. It will probe the best-fit point of the $\bar\nu_e$ disappearance experiments at 4$\sigma$ in 1 year and the favored regions of the sterile neutrino parameter space at more than 3$\sigma$ in 3 years. PROSPECT will test the origin of spectral deviations observed in recent $\theta_{13}$ experiments, search for sterile neutrinos, and address the hypothesis of sterile neutrinos as an explanation of the reactor anomaly. This paper describes the design, construction, and commissioning of PROSPECT and reports first data characterizing the performance of the PROSPECT antineutrino detector., Comment: 30 pages, 33 figures; updated with journal revision and reference
Published: 2018
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21. Projected WIMP sensitivity of the LUX-ZEPLIN (LZ) dark matter experiment

Author: M. Sarychev, T. K. Edberg, B. Boxer, D. Temples, K. Pushkin, A. Dobi, H. N. Nelson, K. J. Palladino, J. H. Buckley, S. Kyre, Simon Fayer, K. Stifter, J.S. Saba, S. Powell, Henrique Araujo, B. J. Mount, T. A. Shutt, J. A. Morad, J. Reichenbacher, J. E. Y. Dobson, J.R. Verbus, U. Utku, C. Chan, C. E. Tull, F. Neves, V. A. Kudryavtsev, W. Skulski, S. Luitz, J. Yin, S. J. Haselschwardt, R. Linehan, C. M. Ignarra, D. J. Taylor, E. K. Pease, C. Silva, J. Lin, S. Fiorucci, Vv. Bugaev, V. N. Solovov, C. D. Kocher, C. Levy, Sergey Burdin, Bjoern Penning, K. C. Oliver-Mallory, J. Li, E. H. Miller, P. Rossiter, X. Liu, T. Tope, A. Cottle, W. R. Edwards, R. Taylor, C. Ghag, W.L. Waldron, A. J. Bailey, Carl W. Akerlof, Minfang Yeh, Hoff, J. M. Lyle, Elena Korolkova, C. R. Hall, F.-T. Liao, W. H. Lippincott, Witherell, M. C. Carmona-Benitez, A. Piepke, S. Hans, R. L. Mannino, P. Sorensen, A. Manalaysay, T. Benson, S. A. Hertel, E. Voirin, D. Khaitan, Mgd van der Grinten, A. Richards, K. Kamdin, W. Craddock, Ethan Bernard, E. Druszkiewicz, H. Kraus, D. Q. Huang, P. Beltrame, W. J. Wisniewski, M. Timalsina, S. Shaw, Yue Meng, J. Y.K. Hor, L. Tvrznikova, A. Murphy, B. G. Lenardo, J. E. Cutter, K.J. Thomas, K. E. Boast, B. N. Ratcliff, T.M. Stiegler, A. Currie, T. J. Whitis, R. M. Preece, J. Va’vra, D. A. Bauer, M. Solmaz, E. Morrison, W. Ji, A. Fan, T. P. Biesiadzinski, J. Genovesi, Ian S. Young, Ben Carlson, Olevitch, S. J. Patton, C. E. Dahl, X. Bai, P. Brás, Michael Schubnell, C. Maupin, J. Mock, I. Stancu, Daniel McKinsey, J. A. Nikoleyczik, J. Belle, A. Lindote, David Leonard, S. Alsum, P. A. Terman, M. E. Monzani, Juhyeong Lee, Matthew Szydagis, L. Kreczko, J. R. Watson, Duncan Carlsmith, S. Balashov, K. T. Lesko, Mani Tripathi, Richard Rosero, J.P. Rodrigues, J. Busenitz, C. Rhyne, H.J. Krebs, Antonin Vacheret, C. Hjemfelt, A. Cole, R. J. Gaitskell, L.D. Viveiros, M. Arthurs, M.R. Stark, A. Tomás, R. C. Webb, D. White, K. O'Sullivan, J. Keefner, J. Liao, I. Olcina, F.L.H. Wolfs, Peter Majewski, J. J. Cherwinka, D. S. Akerib, A. Khazov, J.J. Silk, Wolfgang Lorenzon, W. C. Taylor, K. Hanzel, K. Skarpaas, J. Balajthy, Benjamin Krikler, T. Fruth, M. G. D. Gilchriese, C. Carels, Yeongduk Kim, W. H. To, S. D. Worm, Seth Hillbrand, Asher Kaboth, D. Woodward, P.R. Scovell, B.L. Paredes, R. W. Schnee, M.I. Lopes, and Science and Technology Facilities Council (STFC)
Subjects: BACKGROUNDS, Physics - Instrumentation and Detectors, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Dark matter, chemistry.chemical_element, FOS: Physical sciences, Astronomy & Astrophysics, GASES, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Physics, Particles & Fields, Galactic halo, Nuclear physics, XENON, LIMITS, High Energy Physics - Experiment (hep-ex), Xenon, Recoil, WIMP, RADIOACTIVITY, 0103 physical sciences, 010306 general physics, DETECTOR, physics.ins-det, Instrumentation and Methods for Astrophysics (astro-ph.IM), Physics, Science & Technology, 010308 nuclear & particles physics, hep-ex, Detector, Instrumentation and Detectors (physics.ins-det), chemistry, Weakly interacting massive particles, LOADED LIQUID SCINTILLATOR, Physical Sciences, SIMULATION, astro-ph.CO, RECOIL, Astrophysics - Instrumentation and Methods for Astrophysics, EMISSION, Sensitivity (electronics), Astrophysics - Cosmology and Nongalactic Astrophysics, astro-ph.IM
Abstract: LUX-ZEPLIN (LZ) is a next generation dark matter direct detection experiment that will operate 4850 feet underground at the Sanford Underground Research Facility (SURF) in Lead, South Dakota, USA. Using a two-phase xenon detector with an active mass of 7~tonnes, LZ will search primarily for low-energy interactions with Weakly Interacting Massive Particles (WIMPs), which are hypothesized to make up the dark matter in our galactic halo. In this paper, the projected WIMP sensitivity of LZ is presented based on the latest background estimates and simulations of the detector. For a 1000~live day run using a 5.6~tonne fiducial mass, LZ is projected to exclude at 90\% confidence level spin-independent WIMP-nucleon cross sections above $1.4 \times 10^{-48}$~cm$^{2}$ for a 40~$\mathrm{GeV}/c^{2}$ mass WIMP. Additionally, a $5\sigma$ discovery potential is projected reaching cross sections below the exclusion limits of recent experiments. For spin-dependent WIMP-neutron(-proton) scattering, a sensitivity of $2.3 \times 10^{-43}$~cm$^{2}$ ($7.1 \times 10^{-42}$~cm$^{2}$) for a 40~$\mathrm{GeV}/c^{2}$ mass WIMP is expected. With underground installation well underway, LZ is on track for commissioning at SURF in 2020., Comment: 14 pages, 11 figures
Published: 2018
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22. The water purification system for the Daya Bay Reactor Neutrino Experiment

Author: R. L. Brown, Changgen Yang, Minfang Yeh, R. Rosero, Y. Yang, J. Goett, G. S. Li, J. J. Cherwinka, R. W. Hackenburg, R. Bopp, H. Q. Lu, J. C. Liu, J. Wilhelmi, Q. Xiao, X. N. Li, Jim Napolitano, J. Kilduff, Paul Stoler, N. Raper, M. V. Diwan, E. Dale, C. Pearson, L. S. Littenberg, and J. P. Cummings
Subjects: Physics, Physics - Instrumentation and Detectors, business.industry, Process Chemistry and Technology, Daya bay, Environmental engineering, FOS: Physical sciences, Portable water purification, Instrumentation and Detectors (physics.ins-det), Daya Bay Reactor Neutrino Experiment, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Water clarity, Water environment, Water conductivity, Safety, Risk, Reliability and Quality, Process engineering, business, Waste Management and Disposal, Biotechnology
Abstract: We describe the design, installation, and operation of a purification system that is able to provide large volumes of high purity ASTM (D1193-91) Type-I water to a high energy physics experiment. The water environment is underground in a lightly sealed system, and this provides significant challenges to maintaining high purity in the storage pools, each of which contains several thousand cubic meters. High purity is dictated by the need for large optical absorption length, which is critical for the operation of the experiment. The system is largely successful, and the water clarity criteria are met. We also include a discussion of lessons learned., Comment: Keywords: High purity water, Deionization
Published: 2015
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23. Improved measurement of the reactor antineutrino flux and spectrum at Daya Bay

Author: P. Jaffke, Y. K. Hor, L. Guo, H. H. Zhang, J. Lee, F. Li, Chao Zhang, S. Zeng, M. Dolgareva, Jen-Chieh Peng, C. Li, H. L. H. Wong, Y. X. Zhang, Marco Grassi, Miao He, J. Dove, J. P. Cummings, S. H. Kettell, X. B. Ma, J. J. Cherwinka, Z. M. Wang, S. J. Patton, W. Q. Gu, X. P. Ji, X. C. Ruan, J. B. Jiao, J. Joshi, Z. Guo, Michael Kramer, Chun S. J. Pun, Hanxiong Huang, L. Kang, Yi-Fang Zhao, Maxim Gonchar, K. M. Heeger, W. Tang, H. L. Zhuang, M. V. Diwan, Haosheng Chen, Shaomin Chen, Jun Cao, Rupert Leitner, K. T. McDonald, J. M. Link, S. K. Lin, R. A. Johnson, N. Y. Wang, M. Qi, Vit Vorobel, S. F. Li, C. H. Wu, W. J. Wu, Changgen Yang, Changjian Lin, B. Viren, Richard Rosero, R. D. McKeown, J. K. Xia, Jiawen Zhang, Yanchu Wang, Y. Malyshkin, Dmitry V. Naumov, R. T. Lei, H. R. Band, D. C. Jones, Wei Li, A. B. Balantekin, Kwong Lau, X. L. Ji, C. Lu, J. L. Xu, H. Y. Ngai, R. L. Gill, Meng Wang, H. Liang, Yixue Chen, G. X. Sun, N. Viaux, Liangjian Wen, Y. C. Lin, Guofu Cao, H. Y. Wei, T. Hu, Y. L. Chan, Mengsu Yang, Bing-Lin Young, Haijun Yang, X. Wang, M. Mooney, W. R. Cen, Xingtao Huang, D. W. Liu, Minfang Yeh, T. Kwok, M. Bishai, Qinglong Wu, Kam Biu Luk, D. M. Xia, Zhiyong Zhang, Haoqi Lu, Dejun Li, Guey-Lin Lin, Y. Nakajima, Jonathan S. Lu, Z. Ye, H. R. Pan, L. S. Littenberg, L. H. Whitehead, Yi Chen, Chunjie Wang, N. Raper, Tian Xue, J. H. Cheng, M. W. Kwok, E. Naumova, D. A. Dwyer, B. Roskovec, Zhi Ning, Y. Chang, Q. J. Li, Xiaohu Guo, M. T. Yang, Chang-Wei Loh, Xuefeng Ding, T. J. Langford, Y. K. Heng, Mengyun Guan, K. V. Tsang, Yufeng Li, K. L. Jen, Li Zhou, B. R. Littlejohn, C. E. Tull, Shanfeng Li, H. M. Steiner, L. Lebanowski, Y. Y. Ding, Z. K. Cheng, D. Cao, Y. Q. Ma, Z. P. Zhang, Zhijian Zhang, M. Ye, K. Whisnant, J. Cheng, Artem Chukanov, Juan Pedro Ochoa-Ricoux, Nan Zhou, Zhibing Li, K. Treskov, D. Taychenachev, Alexander Olshevskiy, Lawrence Pinsky, K. K. Kwan, G. Hussain, R. P. Guo, Y. Xu, E. C. Huang, Yaping Cheng, Qingmin Zhang, V. Pec, J. J. Ling, Q. W. Zhao, Q. Y. Chen, S. Hans, B. Z. Hu, Guisen Li, Jim Napolitano, Li Chang, W. L. Zhong, F. P. An, Honghan Gong, Qingming Ma, Siew Cheng Wong, W. R. Edwards, Y. B. Hsiung, Ran Han, Jiaheng Zou, Lin Yang, Jinmei Liu, Jing Zhao, X. Y. Ma, J. Y. Xu, I. Mitchell, S. Jetter, Wenju Huo, Simon Blyth, Ming Chung Chu, W. Hu, Zeyuan Yu, Xin Qian, S. Kohn, Xiao-yan Li, A. Higuera, Zhi-zhong Xing, Ziyan Deng, Jianglai Liu, Jinjuan Ren, W. H. Wang, R. W. Hackenburg, Z. Wang, Guanghua Gong, Y. M. Zhang, D. E. Jaffe, T. Wise, Patrick Huber, J. F. Chang, X. T. Zhang, Shengxin Lin, D. A. Martinez Caicedo, J. L. Sun, R. G. Wang, J. Park, J. H. C. Lee, Liang Zhan, E. T. Worcester, Z. Lv, F. Z. Qi, J. de Arcos, and Christopher G. White
Subjects: Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Daya bay, energy spectrum, Flux, FOS: Physical sciences, Daya Bay Reactor Neutrino Experiment, antineutrino flux, Daya Bay, reactor, 01 natural sciences, High Energy Physics - Experiment, Positron energy, Physics::Geophysics, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Energy spectrum, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Instrumentation, Physics, 010308 nuclear & particles physics, Astronomy and Astrophysics, Instrumentation and Detectors (physics.ins-det), Inverse beta decay, High Energy Physics::Experiment
Abstract: A new measurement of the reactor antineutrino flux and energy spectrum by the Daya Bay reactor neutrino experiment is reported. The antineutrinos were generated by six 2.9~GW$_{\mathrm{th}}$ nuclear reactors and detected by eight antineutrino detectors deployed in two near (560~m and 600~m flux-weighted baselines) and one far (1640~m flux-weighted baseline) underground experimental halls. With 621 days of data, more than 1.2 million inverse beta decay (IBD) candidates were detected. The IBD yield in the eight detectors was measured, and the ratio of measured to predicted flux was found to be $0.946\pm0.020$ ($0.992\pm0.021$) for the Huber+Mueller (ILL+Vogel) model. A 2.9~$\sigma$ deviation was found in the measured IBD positron energy spectrum compared to the predictions. In particular, an excess of events in the region of 4-6~MeV was found in the measured spectrum, with a local significance of 4.4~$\sigma$. A reactor antineutrino spectrum weighted by the IBD cross section is extracted for model-independent predictions., Comment: version published in Chinese Physics C
Published: 2017

24. Identification of Radiopure Titanium for the LZ Dark Matter Experiment and Future Rare Event Searches

Author: A.V. Khromov, P. Sorensen, D. Woodward, Duncan Carlsmith, M. Arthurs, J.S. Saba, Henrique Araujo, Yue Meng, M. G. D. Gilchriese, M. Horn, W. Skulski, S. A. Hertel, E. Druszkiewicz, E. H. Miller, D. White, C. Carels, K. Stifter, A. Manalaysay, L. Tvrznikova, M. S. Witherell, M. C. Carmona-Benitez, P. Rossiter, Laura Manenti, J. Va’vra, A. St. J. Murphy, B. Holbrook, C. R. Hall, B. Gomber, R. Coughlen, C. Levy, V.V. Sosnovtsev, Adam Bernstein, K. Kamdin, Ethan Bernard, T. J. R. Davison, J. J. Cherwinka, S. Hans, A. Currie, P.R. Scovell, P. Beltrame, E. Mizrachi, S. Fiorucci, K. J. Palladino, V. M. Gehman, Ben Carlson, T. J. Whitis, H. Kraus, R. W. Schnee, R. Bramante, M. Hoff, M.I. Lopes, I. J. Arnquist, J. Mock, W. R. Edwards, Carl W. Akerlof, D. J. Markley, J. Thomson, J. Yin, I. Olcina, F.L.H. Wolfs, K. Pushkin, S. J. Haselschwardt, H. J. Krebs, C. Chiller, S. Alsum, S. Shaw, M. G. D. van der Grinten, E. K. Pease, B. Lopez Paredes, S. Luitz, P. Brás, K. E. Boast, C. Silva, Elena Korolkova, A. Khazov, Andreas Piepke, T.J. Martin, W. L. Waldron, D. Q. Huang, A. Lindote, J. Belle, R.M. Gerhard, W.W. Craddock, T.W. Hurteau, K.J. Thomas, P. A. Terman, V. N. Solovov, D. Yu. Akimov, C. H. Faham, K. C. Oliver-Mallory, T.M. Stiegler, J. O'Dell, A. Cottle, B. Boxer, A. Konovalov, M. E. Monzani, W. C. Taylor, L. Reichhart, M.J. Barry, Juhyeong Lee, T. K. Edberg, C. Chan, I. Stancu, M. Timalsina, Wenzhao Wei, Michael Schubnell, D. Temples, D. J. Taylor, M. Solmaz, C. Ghag, R. M. Preece, S. Balashov, N.J. Gantos, R. G. Jacobsen, P. Majewski, M. Sarychev, R. Wang, J. Balajthy, K. Hanzel, H. S. Lee, Steven Worm, J. H. Buckley, A. J. Bailey, A. C. Kaboth, Matthew Szydagis, M. Koyuncu, J.R. Verbus, R. Bunker, W. H. Lippincott, Daniel McKinsey, T. Benson, A. V. Kumpan, Eric W. Hoppe, Antonin Vacheret, C. Hjemfelt, M.R. Stark, X. Bai, Minfang Yeh, B. N. Ratcliff, R. L. Mannino, T. Fruth, W. Ji, Seth Hillbrand, M. A. Olevitch, A. Richards, Jilei Xu, D. Khaitan, J. Lin, K. O’Sullivan, C. Nehrkorn, W. H. To, J. Reichenbacher, A. A. Chiller, J. A. Nikkel, W.T. Emmet, D. S. Akerib, R. Linehan, R. Watson, Mani Tripathi, David Leonard, Richard Rosero, J.P. Rodrigues, J. Busenitz, K. T. Lesko, C. Lee, C. Rhyne, R. J. Gaitskell, Kareem Kazkaz, Carl Vuosalo, T. P. Biesiadzinski, R. C. Webb, C. E. Dahl, T. J. Sumner, S. Kyre, F. Neves, R. Leonard, Wolfgang Lorenzon, H. J. Rose, S. Stephenson, Chao Zhang, W. J. Wisniewski, J.Y-K. Hor, Alexander Bolozdynya, V. Bugaev, Dongming Mei, F.-T. Liao, T. E. Tope, M. R. While, A. Dobi, H. N. Nelson, V. A. Kudryavtsev, S. Powell, D. R. Tiedt, B. J. Mount, T. A. Shutt, J. A. Morad, E. Holtom, J. E. Y. Dobson, C. M. Ignarra, C. T. McConnell, K. Skarpaas, M. F. Marzioni, A. Tomás, Sergey Burdin, X. Liu, and Science and Technology Facilities Council (STFC)
Subjects: Cryostat, Physics - Instrumentation and Detectors, ZEPLIN-III, Dark matter, chemistry.chemical_element, FOS: Physical sciences, Cryogenics, Astronomy & Astrophysics, 7. Clean energy, 01 natural sciences, Physics, Particles & Fields, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Xenon, 0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics, 0103 physical sciences, 010306 general physics, physics.ins-det, Physics, Science & Technology, 010308 nuclear & particles physics, hep-ex, Detector, Astronomy and Astrophysics, Instrumentation and Detectors (physics.ins-det), Nuclear & Particles Physics, 0201 Astronomical And Space Sciences, chemistry, 13. Climate action, Physical Sciences, Event (particle physics), Titanium, GERDA
Abstract: The LUX-ZEPLIN (LZ) experiment will search for dark matter particle interactions with a detector containing a total of 10 tonnes of liquid xenon within a double-vessel cryostat. The large mass and proximity of the cryostat to the active detector volume demand the use of material with extremely low intrinsic radioactivity. We report on the radioassay campaign conducted to identify suitable metals, the determination of factors limiting radiopure production, and the selection of titanium for construction of the LZ cryostat and other detector components. This titanium has been measured with activities of $^{238}$U$_{e}$~$, Comment: 13 pages, 3 figures, accepted for publication in Astroparticle Physics
Published: 2017
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25. IceCube Enhanced Hot Water Drill functional description

Author: R. Paulos, A. Elcheikh, Albrecht Karle, F. Feyzi, L. Greenler, J. Haugen, Michael DuVernois, J. J. Cherwinka, T. Benson, and M. Mulligan
Subjects: 010504 meteorology & atmospheric sciences, Drill, 010308 nuclear & particles physics, Firn, Borehole, Drilling, 01 natural sciences, Functional description, Particle detector, IceCube Neutrino Observatory, 0103 physical sciences, Thermal, Geomorphology, Geology, Seismology, 0105 earth and related environmental sciences, Earth-Surface Processes
Abstract: The IceCube Neutrino Observatory was constructed at the South Pole during the 2004/05 to 2010/11 austral summer seasons. IceCube transforms 1 km3 of Antarctic ice into an astrophysical particle detector composed of 86 cables (strings) of optical sensors buried deep beneath the surface. Each string required drilling a borehole ∼60 cm in diameter to a depth of 2500 m. The 5 MW Enhanced Hot Water Drill was designed and built specifically for this task, capable of producing the required boreholes at a rate of one hole per 48 hours. Hot-water drilling on this scale presented unique challenges and was rich in lessons learned, yielding a collection of notable developments and takeaways (e.g. fuel-saving measures, thermal modeling, firn drilling and closed-loop computer control). Descriptions of system functionality and of lessons learned from IceCube drilling are presented.
Published: 2014
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26. Results from the Daya Bay Reactor Neutrino Experiment

Author: Y. X. Zhang, Y. H. Tam, S. H. Zhang, D. M. Xia, Yue Meng, Q. J. Li, Kam-Biu Luk, Haoqi Lu, Y. F. Wang, L. E. Piilonen, C. Chasman, N. Tagg, H. K. Tanaka, Qinglong Wu, Miao He, S. Jetter, K. Shih, Jinjuan Ren, J. F. Chang, K. V. Tsang, Yi Wei, J. J. Ling, P. Hinrichs, Tian Xue, R. H.M. Tsang, Kirk T. McDonald, Huo Yan Chen, M. Qi, S. R. Ely, Y. K. Heng, J. Lee, W. C. Lai, C. Lu, J. L. Xu, M. Bishai, A. G. Olshevski, H. L. H. Wong, Hanxiong Huang, L. Kang, H. S. Chen, Q. W. Zhao, H. R. Band, W. R. Edwards, X. C. Chen, Yaolin Zhao, Jianbin Xu, L. S. Littenberg, L. Y. Wang, L. S. Pinsky, R. W. Hackenburg, S. D. Fang, N. Y. Wang, B. Viren, Z. Wang, Yan Zhang, H. Y. Ngai, R. L. Gill, L. S. Wang, J. B. Jiao, M. Ye, Igor Nemchenok, Zhijian Zhang, L. Zheng, D. M. Webber, L. H. Whitehead, B. B. Shao, Zhi Ning, J. K. C. Leung, F. H. Zhang, Yi Chen, Q. He, Juan Pedro Ochoa-Ricoux, A. B. Balantekin, Guisen Li, Honghan Gong, S. K. Lin, Chun S. J. Pun, X. L. Ji, H. Themann, R. T. Lei, H. Liang, Yixue Chen, S. J. Chen, Ziyan Deng, Mengyun Guan, Zhongyuan Zhou, Guanghua Gong, Jianglai Liu, B. R. Littlejohn, W. K. Ngai, B. Z. Hu, S. H. Kettell, Chi Lin, Shaomin Chen, Jun Cao, X. B. Ma, Rupert Leitner, Y. Xu, C. A. Lewis, Bing-Lin Young, D. E. Jaffe, J. J. Cherwinka, M. Z. Wang, Ming Chung Chu, Xiao Tang, Xin Qian, Y. H. Chang, Y. A. Gornushkin, K. Whisnant, Kwong Lau, Xurong Chen, J. Y. Fu, T. Wise, Jiaheng Zou, L. Lebanowski, Y. Y. Ding, D. A. Dwyer, Li Zhou, Kwok Yin Leung, G. X. Sun, L. Z. Wang, C. E. Tull, R. L. Hahn, X. T. Huang, C. G. Yang, M. C. McFarlane, Zhi-zhong Xing, H. Z. Huang, X. F. Du, Y. K. Hor, Richard Rosero, S. Trentalange, D. Mohapatra, Maxim Gonchar, Ching-Yao Lai, Xiaoyuan Chen, K. K. Kwan, H. M. Steiner, Xinglong Li, Dmitry V. Naumov, S. J. Patton, W. Q. Gu, V. Pec, Y. Q. Ma, Chao Zhang, R. A. Johnson, R. L. Brown, Fengpeng An, S. Hans, Wai Ting Chan, Jonathan M. Link, H. L. Zhuang, R. Carr, Jiawen Zhang, W. L. Zhong, Qiumei Ma, Vit Vorobel, Z. Isvan, J. P. Cummings, Wei Li, Y. S. Yeh, M. W. Kwok, Yagmur Torun, H. Y. Wei, S. Blyth, Y. B. Nie, Zhiyong Zhang, L. Q. Ge, Zai-Wei Fu, T. Kwok, Guey-Lin Lin, Y. C. Zhang, F. Li, Liangjian Wen, Z. M. Wang, Xuan Wang, E. Draeger, Guofu Cao, Yufeng Li, K. M. Heeger, Y. Williamson, Z. P. Zhang, Y. B. Liu, H. J. Jiang, Minfang Yeh, J. Z. Bai, Q. An, B. Roskovec, Wing-Hon Lai, X. B. Li, T. Hu, W. Beriguete, Jen-Chieh Peng, J. B. Xi, Michael Kramer, R. D. McKeown, E. T. Worcester, F. Z. Qi, R. G. Wang, Liang Zhan, A. Luk, X. H. Guo, C. H. Wang, X. P. Ji, J. L. Sun, Christopher G. White, N. Raper, Y. C. Tung, Patrick Huber, X. C. Ruan, D. W. Liu, Vadim Issakov, Y. Nakajima, Y. C. Lin, Z. Y. Yu, Qingmin Zhang, Jim Napolitano, M. V. Diwan, X. Q. Li, Hao Hao, Z. B. Li, Lin Yang, O. D. Tsai, Jinmei Liu, Jing Zhao, X. Y. Ma, W. Wang, Y. B. Hsiung, and F. F. Wu
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Solar neutrino, Daya bay, Daya Bay Reactor Neutrino Experiment, Solar neutrino problem, Neutrino oscillation, Atomic and Molecular Physics, and Optics
Abstract: The Daya Bay Reactor Neutrino Experiment was designed to achieve a sensitivity on the value of sin^2 2θ_(13) to better than 0.01 at 90% CL. The experiment consists of eight antineutrino detectors installed underground at different baselines from six nuclear reactors. With data collected with six antineutrino detectors for 55 days, Daya Bay announced the discovery of a non-zero value for sin^2 2θ_(13) with a significance of 5.2 standard deviations in March 2012. The most recent analysis with 139 days of data acquired in a six-detector configuration yields sin^2 2θ_(13) = 0.089 ± 0.010 (stat.) ± 0.005 (syst.), which is the most precise measurement of sin^2 2θ_(13) to date.
Published: 2014
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27. A low mass optical grid for the PROSPECT reactor antineutrino detector

Author: M. V. Diwan, J. J. Cherwinka, Hans P. Mumm, K. Gilje, D. Norcini, Michael Febbraro, B. Viren, J. T. Matta, D. E. Jaffe, K. M. Heeger, Y-R Yen, J. A. Nikkel, A. B. Hansell, K. H. Hermanek, X. Lu, T. J. Langford, D. Davee, J. Wilhelmi, D. C. Jones, J. Insler, A.E. Detweiler, J. Ashenfelter, Dmitry A. Pushin, A. J. Conant, A. B. Balantekin, D. A. Martinez Caicedo, O. Kyzylova, H. R. Band, E. Romero-Romero, C. D. Bass, B. T. Foust, M. J. Dolinski, Nathaniel Bowden, C.E. Gilbert, Minfang Yeh, P. E. Mueller, M. A. Tyra, D. J. Dean, C. E. Lane, R. Rosero, J. M. Minock, Xin Qian, Denis E. Bergeron, G. Deichert, R. L. Varner, R. D. McKeown, J. P. Brodsky, Chao Zhang, M. P. Mendenhall, S. Hans, R. Neilson, S. Nour, Anna Erickson, J. LaRosa, T. Wise, D. Berish, Y. Gebre, Jim Napolitano, Aiwu Zhang, A. Galindo-Uribarri, B. R. Littlejohn, P. T. Surukuchi, X. Zhang, B. Hackett, Dusan Sarenac, Ian Gustafson, Christopher G. White, T. Classen, J. K. Gaison, and C. D. Bryan
Subjects: Physics, Physics - Instrumentation and Detectors, Optics, business.industry, Detector, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), business, Low Mass, Grid, Instrumentation, Mathematical Physics
Abstract: PROSPECT, the Precision Reactor Oscillation and SPECTrum experiment, is a short-baseline reactor antineutrino experiment designed to provide precision measurements of the $^{235}$U product $\overline{\nu}_e$ spectrum of utilizing an optically segmented 4-ton liquid scintillator detector. PROSPECT's segmentation system, the optical grid, plays a central role in reconstructing the position and energy of $\overline{\nu}_e$ interactions in the detector. This paper is the technical reference for this PROSPECT subsystem, describing its design, fabrication, quality assurance, transportation and assembly in detail. In addition, the dimensional, optical and mechanical characterizations of optical grid components and the assembled PROSPECT target are also presented. The technical information and characterizations detailed here will inform geometry-related inputs for PROSPECT physics analysis, and can guide a variety of future particle detection development efforts, such as those using optically reflecting materials or filament-based 3D printing., Comment: 31 pages, 28 figures
Published: 2019
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28. Lithium-loaded liquid scintillator production for the PROSPECT experiment

Author: R. L. Varner, X. Lu, M. V. Diwan, P. E. Mueller, B. Hackett, J. LaRosa, R. Neilson, D. A. Martinez Caicedo, A. J. Conant, A. B. Hansell, D. Davee, Aiwu Zhang, Lindsey J. Bignell, J. T. Matta, X. Zhang, J. J. Cherwinka, B. T. Foust, D. E. Jaffe, A. Galindo-Uribarri, B. R. Littlejohn, P. T. Surukuchi, Y-R Yen, G. Deichert, J. A. Nikkel, Dmitry A. Pushin, J. Wilhelmi, C. Camilo Reyes, T. J. Langford, Christopher G. White, C. D. Bryan, T. Classen, J. Ashenfelter, H. R. Band, Michael Febbraro, S. Campos, B. Hayes, J. K. Gaison, B. Viren, Nathaniel Bowden, M. A. Tyra, Dusan Sarenac, R. Diaz Perez, Xin Qian, C.E. Gilbert, S. Nour, Anna Erickson, T. Wise, D. Berish, C. D. Bass, M. J. Dolinski, S. Hans, J. P. Brodsky, R. Rosero, Denis E. Bergeron, R. D. McKeown, E. Romero-Romero, Minfang Yeh, D. Norcini, Hans P. Mumm, D. J. Dean, K. M. Heeger, Jim Napolitano, D. C. Jones, J. Insler, A. B. Balantekin, O. Kyzylova, C. E. Lane, Chao Zhang, and M. P. Mendenhall
Subjects: Optical absorbance, Physics - Instrumentation and Detectors, Materials science, Fabrication, 010308 nuclear & particles physics, Analytical chemistry, FOS: Physical sciences, chemistry.chemical_element, Instrumentation and Detectors (physics.ins-det), Scintillator, 7. Clean energy, 01 natural sciences, Photon yield, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, chemistry, Yield (chemistry), 0103 physical sciences, Lithium, Instrumentation, Mass fraction, Mathematical Physics
Abstract: This work reports the production and characterization of lithium-loaded liquid scintillator (LiLS) for the Precision Reactor Oscillation and Spectrum Experiment (PROSPECT). Fifty-nine 90 liter batches of LiLS (${}^6{\rm Li}$ mass fraction 0.082%$\pm$0.001%) were produced and samples from all batches were characterized by measuring their optical absorbance relative to air, light yield relative to a pure liquid scintillator reference, and pulse shape discrimination capability. Fifty-seven batches passed the quality assurance criteria and were used for the PROSPECT experiment., 16 pages, 15 figures
Published: 2019
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29. Limits on Active to Sterile Neutrino Oscillations from Disappearance Searches in the MINOS, Daya Bay, and Bugey-3 Experiments

Author: Rakesh Sharma, S. Childress, Wenju Huo, H. H. Zhang, D. Cao, A. Schreckenberger, N. Graf, C. D. Moore, R. Gran, Carlos Escobar, Simon Blyth, R. K. Plunkett, X. L. Ji, S. Moed Sher, Haosheng Chen, M. Z. Wang, Ming Chung Chu, D. Torretta, W. Hu, G. J. Bock, J. M. Link, N. Poonthottathil, Jen-Chieh Peng, J. K. Xia, J. Lee, R. W. Hackenburg, S. Zeng, X. Qiu, M. Dolgareva, Carl White, Z. Wang, J. Dove, Chun S. J. Pun, C. M. Castromonte, J. Joshi, J. P. Cummings, M. M. Medeiros, Michael Kramer, L. Corwin, W. J. Wu, R. D. McKeown, P. Sail, Shaomin Chen, Jun Cao, Xuefeng Ding, Z. K. Cheng, Z. P. Zhang, H. L. H. Wong, Y. X. Zhang, X. P. Ji, J. Hartnell, P. Lucas, Hanxiong Huang, S. C. Tognini, Rupert Leitner, M. Qi, Changjian Lin, Gregory J Pawloski, J. Park, L. Kang, J. K. C. Leung, Li Zhou, R. Mehdiyev, K. L. Jen, S. H. Kettell, Yaping Cheng, T. Hu, X. B. Ma, R. B. Patterson, Zhijian Zhang, T. Wise, A. B. Balantekin, S. F. Li, C. Li, Lin Yang, S. R. Mishra, C. James, Yanchu Wang, C. Rosenfeld, X. T. Zhang, M. Mooney, Vit Vorobel, K. Treskov, Dmitry V. Naumov, M. Orchanian, H. Y. Ngai, R. L. Gill, Marco Grassi, Miao He, A. E. Kreymer, D. D. Phan, N. Viaux, S. R. Hahn, Kwong Lau, P. Schreiner, Y. L. Chan, R. Toner, B. Z. Hu, R. Hatcher, D. Cronin-Hennessy, G. X. Sun, B. Rebel, H. A. Rubin, S. K. Lin, J. H. C. Lee, T. Kafka, Jinmei Liu, Jing Zhao, Alec Habig, K. Grzelak, Z. Isvan, L. Mualem, X. Y. Ma, J. Y. Xu, Wei Li, W. A. Mann, F. P. An, T. J. Carroll, P. Adamson, Yanfeng Zhang, S. J. Patton, W. Q. Gu, Y. C. Lin, Mengsu Yang, H. R. Gallagher, Maxim Gonchar, D. W. Liu, Minfang Yeh, Y. Malyshkin, A. Perch, A. Radovic, J. Schneps, I. Mitchell, Harvey B Newman, W. Tang, S. M. S. Kasahara, Marvin L Marshak, X. Wang, P. Gouffon, Liangjian Wen, S. De Rijck, R. A. Johnson, A. Holin, Guofu Cao, Guanghua Gong, X. Tian, Alexander Olshevskiy, M. Bishai, K. T. McDonald, S. Jetter, Haoqi Lu, Dejun Li, W. Flanagan, Wei Wang, B. Roskovec, Jiawen Zhang, Zengcai V. Guo, Y. K. Hor, L. Guo, J. Cheng, Chao Zhang, Jianglai Liu, E. T. Worcester, Z. Lv, F. Z. Qi, H. L. Zhuang, E. Falk, Haijun Yang, J. de Arcos, J. Urheim, Guisen Li, J. J. Cherwinka, G. M. Irwin, Zhiyong Zhang, Honghan Gong, Z. Y. Deng, C. E. Tull, N. Y. Wang, Jinjuan Ren, B. Viren, J. H. Cheng, G. J. Feldman, L. S. Littenberg, C. H. Wu, Zhi Ning, I. Anghel, M. A. Thomson, D. Naples, Stanley G. Wojcicki, Li Chang, Y. Xu, E. C. Huang, Karol Lang, Q. W. Zhao, F. Li, B. R. Littlejohn, H. Y. Wei, Yi-Fang Zhao, G. Koizumi, Qingming Ma, V. Pec, R. L. Talaga, J. J. Ling, Yufeng Li, J. O'Connor, J. Hylen, Y. B. Hsiung, R. J. Nichol, W. L. Zhong, M. C. Goodman, M. V. Frohne, T. Kwok, N. Tagg, N. Mayer, J. B. Jiao, R. A. Gomes, M. C. Sanchez, M. V. Diwan, Guey-Lin Lin, Jonathan S. Lu, Z. Ye, R. B. Pahlka, Qinglong Wu, G.D. Barr, Junwei Huang, Leigh H. Whitehead, Kam Biu Luk, Chunjie Wang, M. Y. Gabrielyan, Siew Cheng Wong, Tian Xue, W. R. Cen, R. T. Lei, K. M. Heeger, J. R. Meier, Xin Qian, Juergen Thomas, Y. K. Heng, Z. M. Wang, Q. J. Li, S. V. Cao, J. A. Nowak, Ran Han, Jiaheng Zou, S. Hans, Mengyun Guan, J. A. Musser, Xiao-yan Li, A. Higuera, X. T. Huang, J. M. Paley, K. Whisnant, Zhi-zhong Xing, Joao A B Coelho, Juan Pedro Ochoa-Ricoux, H. R. Band, K. V. Tsang, H. Liang, Yixue Chen, M. Kordosky, Andrew Blake, J. L. Sun, Artem Chukanov, Lawrence Pinsky, A. Timmons, N. Raper, Richard Rosero, J. F. Chang, Changgen Yang, C. Lu, J. L. Xu, L. H. Whitehead, Ning Zhou, Y. Chang, Shanfeng Li, J. J. Evans, M. M. Pfützner, D. E. Jaffe, Y. Nakajima, Yi Chen, R. C. Webb, M. W. Kwok, L. Lebanowski, Y. Y. Ding, D. M. Xia, J. K. De Jong, S. Phan-Budd, A. Sousa, K. K. Kwan, N. E. Devenish, P. J. Litchfield, R. P. Guo, G. Tzanakos, C. L. McGivern, S. Kohn, S. Germani, Warner A. Miller, A. V. Devan, Bing-Lin Young, D. Bogert, A. Aurisano, W. R. Edwards, E. Naumova, D. A. Dwyer, T. J. Langford, H. M. Steiner, P. Vahle, Y. Q. Ma, Patrick Huber, Shengxin Lin, D. A. Martinez Caicedo, J. K. Nelson, R. G. Wang, D. A. Jensen, Liang Zhan, M. D. Messier, A. C. Weber, X. C. Ruan, Qingmin Zhang, Q. Y. Chen, Jim Napolitano, Xiaohu Guo, M. T. Yang, Hao Pan, C. W. Loh, Z. Y. Yu, Zhibing Li, M. Ye, D. Taychenachev, G. Hussain, J. Todd, P. Jaffke, and R. Chen
Subjects: Physics, Particle physics, Sterile neutrino, Liquid Scintillator Neutrino Detector, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, General Physics and Astronomy, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, MiniBooNE, High Energy Physics - Experiment (hep-ex), MINOS, 0103 physical sciences, Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, 010306 general physics, Neutrino oscillation, Electron neutrino, QC
Abstract: Searches for a light sterile neutrino have been performed independently by the MINOS and the Daya Bay experiments using the muon (anti)neutrino and electron antineutrino disappearance channels, respectively. In this Letter, results from both experiments are combined with those from the Bugey-3 reactor neutrino experiment to constrain oscillations into light sterile neutrinos. The three experiments are sensitive to complementary regions of parameter space, enabling the combined analysis to probe regions allowed by the LSND and MiniBooNE experiments in a minimally extended four-neutrino flavor framework. Stringent limits on $\sin^2 2\theta_{\mu e}$ are set over 6 orders of magnitude in the sterile mass-squared splitting $\Delta m^2_{41}$. The sterile-neutrino mixing phase space allowed by the LSND and MiniBooNE experiments is excluded for $\Delta m^2_{41} < 0.8$ eV$^2$ at 95% CL$_s$., Comment: 8 pages, 4 figures, published in Physical Review Letters. Data release found at http://www-numi.fnal.gov/PublicInfo/forscientists.html and at https://wiki.bnl.gov/dayabay/index.php?title=Daya_Bay%27s_Sterile_Neutrino_Results_in_2016
Published: 2016
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30. Measurement of muon annual modulation and muon-induced phosphorescence in NaI(TI) crystals with DM-Ice17

Author: Max Robinson, S. M. Paling, Walter C. Pettus, Liang Yang, J. J. Cherwinka, N. J. C. Spooner, B. N. Reilly, K. E. Lim, P. Sandstrom, K. M. Heeger, L. Hsu, M. Kauer, Albrecht Karle, S. Telfer, Reina H. Maruyama, V. A. Kudryavtsev, A. J. F. Hubbard, Francis Halzen, Calum Michael Macdonald, Darren Grant, and Z. P. Pierpoint
Subjects: Physics, Scintillation, Muon, Photon, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, Dark matter, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, Crystal, High Energy Physics - Experiment (hep-ex), Amplitude, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Phosphorescence, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Energy (signal processing), Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We report the measurement of muons and muon-induced phosphorescence in DM-Ice17, a NaI(Tl) direct detection dark matter experiment at the South Pole. Muon interactions in the crystal are identified by their observed pulse shape and large energy depositions. The measured muon rate in DM-Ice17 is 2.93 +/- 0.04 muons/crystal/day with a modulation amplitude of 12.3 +/- 1.7%, consistent with expectation. Following muon interactions, we observe long-lived phosphorescence in the NaI(Tl) crystals with a decay time of 5.5 +/- 0.5 s. The prompt energy deposited by a muon is correlated to the amount of delayed phosphorescence, the brightest of which consist of tens of millions of photons. These photons are distributed over tens of seconds with a rate and arrival timing that do not mimic a scintillation signal above 2 keVee. While the properties of phosphorescence vary among individual crystals, the annually-modulating signal observed by DAMA cannot be accounted for by phosphorescence with the characteristics observed in DM-Ice17., 9 pages, 8 figures
Published: 2016

31. Improved Search for a Light Sterile Neutrino with the Full Configuration of the Daya Bay Experiment

Author: W. Tang, Hanxiong Huang, L. Kang, J. K. C. Leung, Simon Blyth, M. Z. Wang, Ming Chung Chu, N. Y. Wang, Jiawen Zhang, B. Viren, W. Hu, Jen-Chieh Peng, Yanchu Wang, Vit Vorobel, Guisen Li, Wei Li, J. J. Cherwinka, J. Dove, X. C. Ruan, J. P. Cummings, Honghan Gong, D. Cao, H. Y. Wei, Zhijian Zhang, Qingming Ma, M. Qi, C. Li, Kwong Lau, Qinglong Wu, Kam Biu Luk, K. Treskov, Bing-Lin Young, Y. K. Hor, Siew Cheng Wong, K. T. McDonald, G. X. Sun, Tian Xue, Guanghua Gong, D. A. Martinez Caicedo, Ning Zhou, L. Guo, Ran Han, Jiaheng Zou, J. Cheng, Michael Kramer, Mengsu Yang, Zhiyong Zhang, Y. K. Heng, F. P. An, S. Hans, Mengyun Guan, L. Lebanowski, Y. Y. Ding, Y. M. Zhang, F. Li, T. Kwok, Chao Zhang, Guey-Lin Lin, M. Ye, S. J. Patton, W. Q. Gu, Jonathan S. Lu, Dongmei Xia, C. H. Wu, D. E. Jaffe, Li Chang, Z. Ye, Yi-Fang Zhao, W. J. Wu, R. D. McKeown, Richard Rosero, Ziyan Deng, K. K. Kwan, K. Whisnant, R. G. Wang, Jianglai Liu, D. Taychenachev, T. Wise, Chunjie Wang, Qingmin Zhang, Y. B. Hsiung, G. Hussain, R. P. Guo, H. L. Zhuang, Xin Qian, Q. Y. Chen, Liang Zhan, B. Z. Hu, M. V. Diwan, P. Jaffke, J. L. Sun, Alexander Olshevskiy, Z. K. Cheng, Z. P. Zhang, Jim Napolitano, Y. Nakajima, Xiao-yan Li, A. Higuera, Haosheng Chen, Juan Pedro Ochoa-Ricoux, E. T. Worcester, Z. Lv, Y. Xu, Zhi-zhong Xing, E. C. Huang, F. Z. Qi, S. H. Kettell, M. W. Kwok, X. B. Ma, Jinjuan Ren, Xiaohu Guo, M. T. Yang, H. H. Zhang, X. L. Ji, J. M. Link, J. de Arcos, Marco Grassi, J. J. Ling, Miao He, W. R. Cen, W. R. Edwards, H. R. Pan, K. V. Tsang, Xingtao Huang, Q. W. Zhao, Yi Chen, E. Naumova, D. A. Dwyer, Q. J. Li, C. W. Loh, M. Bishai, Artem Chukanov, T. J. Langford, K. L. Jen, V. Pec, Yaping Cheng, Lin Yang, J. Joshi, R. W. Hackenburg, Maxim Gonchar, Z. Y. Yu, L. S. Littenberg, Lawrence Pinsky, J. B. Jiao, Z. Wang, H. M. Steiner, Y. Q. Ma, C. E. Tull, J. Park, Jinmei Liu, Rupert Leitner, Jing Zhao, Zhibing Li, X. Y. Ma, J. Y. Xu, Christopher G. White, Zhi Ning, Xuefeng Ding, S. Kohn, S. Jetter, W. L. Zhong, Li Zhou, I. Mitchell, R. A. Johnson, J. H. C. Lee, R. T. Lei, J. Lee, H. R. Band, K. M. Heeger, Y. L. Chan, H. Liang, Yixue Chen, A. B. Balantekin, S. K. Lin, Wei Wang, S. Zeng, M. Dolgareva, H. L. H. Wong, Y. X. Zhang, N. Raper, Y. Malyshkin, D. W. Liu, Liangjian Wen, Guofu Cao, Zengcai V. Guo, X. P. Ji, Minfang Yeh, B. Roskovec, Patrick Huber, X. T. Zhang, H. Y. Ngai, R. L. Gill, N. Viaux, J. K. Xia, T. Hu, Shengxin Lin, Changjian Lin, Haijun Yang, L. H. Whitehead, Yufeng Li, M. Mooney, Y. Chang, Chun S. J. Pun, Shaomin Chen, Jun Cao, Shanfeng Li, S. F. Li, Dmitry V. Naumov, J. H. Cheng, Y. C. Lin, J. F. Chang, B. R. Littlejohn, X. Wang, Changgen Yang, Haoqi Lu, Dejun Li, C. Lu, J. L. Xu, Zhiyuan Wang, and Wenju Huo
Subjects: Physics, Range (particle radiation), Sterile neutrino, Particle physics, 010308 nuclear & particles physics, Daya bay, General Physics and Astronomy, FOS: Physical sciences, Daya Bay Reactor Neutrino Experiment, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Calibration, Neutrino, 010306 general physics, Electron neutrino, Mixing (physics)
Abstract: This Letter reports an improved search for light sterile neutrino mixing in the electron antineutrino disappearance channel with the full configuration of the Daya Bay Reactor Neutrino Experiment. With an additional 404 days of data collected in eight antineutrino detectors, this search benefits from 3.6 times the statistics available to the previous publication, as well as from improvements in energy calibration and background reduction. A relative comparison of the rate and energy spectrum of reactor antineutrinos in the three experimental halls yields no evidence of sterile neutrino mixing in the $2\times10^{-4} \lesssim |\Delta m^{2}_{41}| \lesssim 0.3$ eV$^{2}$ mass range. The resulting limits on $\sin^{2}2\theta_{14}$ are improved by approximately a factor of 2 over previous results and constitute the most stringent constraints to date in the $|\Delta m^{2}_{41}| \lesssim 0.2$ eV$^{2}$ region., Comment: 6 pages, 3 figures, 1 table
Published: 2016
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32. The PROSPECT Physics Program

Author: Minfang Yeh, M. P. Green, R. Neilson, X. Zhang, Wei Wang, Lindsey J. Bignell, D. J. Dean, Christopher G. White, R. L. Varner, J. P. Brodsky, Michael Febbraro, Hans P. Mumm, G. Barclay, T. J. Langford, Steven Sheets, A. Bowes, H. R. Band, B. R. White, C. Trinh, C.D. Bass, B. Viren, D. E. Jaffe, K. M. Heeger, D. A. Martinez Caicedo, Richard Rosero, J. Ashenfelter, B. Heffron, D. Norcini, J. Dolph, K. Commeford, Nathaniel Bowden, Ke Han, Chao Zhang, B. Seilhan, Dmitry A. Pushin, J. Wilhelmi, A. J. Conant, D. C. Jones, J. Insler, A. B. Balantekin, Xin Qian, M. J. Dolinski, E. Romero, S. Hans, C. D. Bryan, Jim Napolitano, T. Classen, G. Zangakis, B. W. Goddard, R. Sharma, J. K. Gaison, J. J. Cherwinka, K. Gilje, G. Deichert, Y-R Yen, A. Glenn, M. V. Diwan, D. Davee, M DuVernois, P. E. Mueller, Christopher B. Williams, J. T. Matta, H. Yao, Rui-Lin Chu, Anna Erickson, T. Wise, D. Berish, B. Hackett, A. Galindo-Uribarri, B. R. Littlejohn, J. Nikkel, P. T. Surukuchi, M P Mendenhall, and R D McKeown
Subjects: Physics, Nuclear and High Energy Physics, Sterile neutrino, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Detector, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Scintillator, Parameter space, 01 natural sciences, Physics::Geophysics, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Nuclear reactor core, Inverse beta decay, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Neutrino, 010306 general physics, Neutrino oscillation, Nuclear Experiment
Abstract: The Precision Reactor Oscillation and Spectrum Experiment, PROSPECT, is designed to make a precise measurement of the antineutrino spectrum from a highly-enriched uranium reactor and probe eV-scale sterile neutrinos by searching for neutrino oscillations over meter-long distances. PROSPECT is conceived as a 2-phase experiment utilizing segmented $^6$Li-doped liquid scintillator detectors for both efficient detection of reactor antineutrinos through the inverse beta decay reaction and excellent background discrimination. PROSPECT Phase I consists of a movable 3-ton antineutrino detector at distances of 7 - 12 m from the reactor core. It will probe the best-fit point of the $\nu_e$ disappearance experiments at 4$\sigma$ in 1 year and the favored region of the sterile neutrino parameter space at $>$3$\sigma$ in 3 years. With a second antineutrino detector at 15 - 19 m from the reactor, Phase II of PROSPECT can probe the entire allowed parameter space below 10 eV$^{2}$ at 5$\sigma$ in 3 additional years. The measurement of the reactor antineutrino spectrum and the search for short-baseline oscillations with PROSPECT will test the origin of the spectral deviations observed in recent $\theta_{13}$ experiments, search for sterile neutrinos, and conclusively address the hypothesis of sterile neutrinos as an explanation of the reactor anomaly., Comment: 21 pages, 21 figures
Published: 2015

33. Light collection and pulse-shape discrimination in elongated scintillator cells for the PROSPECT reactor antineutrino experiment

Author: E. Romero, Chao Zhang, M. P. Mendenhall, J. J. Cherwinka, K. Gilje, H. Yao, A. Galindo-Uribarri, B. R. Littlejohn, Christopher B. Williams, J. Ashenfelter, X. Zhang, D. J. Dean, A. Bowes, Minfang Yeh, P. T. Surukuchi, H. R. Band, N.T. Stemen, J. K. Gaison, B. R. White, R. Sharma, M. V. Diwan, D. E. Jaffe, D. Davee, Rui-Lin Chu, D. A. Martinez Caicedo, C. D. Bryan, Xin Qian, Y-R Yen, L. Saldaña, G. Deichert, R. D. McKeown, B. Balantekin, C. White, G. Zangakis, A. Glenn, J. Wilhelmi, G. Barclay, B. W. Goddard, T. Wise, D. Berish, B. Viren, R. L. Varner, D. A. Dwyer, K. Commeford, T. J. Langford, Steven Sheets, R. Rosero, Jim Napolitano, S. Hans, Ke Han, D. Norcini, B. Heffron, Wei Wang, Nathaniel Bowden, R. Neilson, J. P. Brodsky, J. Dolph, M. J. Dolinski, Hans P. Mumm, T. Classen, C.D. Bass, K. M. Heeger, M. P. Green, B. Seilhan, Dmitry A. Pushin, and P. E. Mueller
Subjects: Physics - Instrumentation and Detectors, FOS: Physical sciences, Scintillator, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Particle identification methods, Calorimeters, Optics, Engineering, Calibration, Neutron, Neutrino detectors, Nuclear Experiment, Instrumentation, Mathematical Physics, Spontaneous fission, Physics, Range (particle radiation), Reflector (photography), business.industry, Detector, Instrumentation and Detectors (physics.ins-det), Nuclear & Particles Physics, Other Physical Sciences, Inverse beta decay, Physical Sciences, business
Abstract: A meter-long, 23-liter EJ-309 liquid scintillator detector has been constructed to study the light collection and pulse-shape discrimination performance of elongated scintillator cells for the PROSPECT reactor antineutrino experiment. The magnitude and uniformity of light collection and neutron/gamma discrimination power in the energy range of antineutrino inverse beta decay products have been studied using gamma and spontaneous fission calibration sources deployed along the cell long axis. We also study neutron-gamma discrimination and light collection abilities for differing PMT and reflector configurations. Key design features for optimizing MeV-scale response and background rejection capabilities are identified., Comment: 20 pages, 11 figures
Published: 2015
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34. A new measurement of antineutrino oscillation with the full detector configuration at Daya Bay

Author: X. C. Ruan, S. H. Kettell, X. B. Ma, Maxim Gonchar, H. S. Chen, M. Ye, R. A. Johnson, S. K. Lin, D. Taychenachev, S. C. Li, Liangjian Wen, K. T. McDonald, G. Hussain, Guofu Cao, J. H. Cheng, Min-Xin Guan, X. Wang, Xiaohu Guo, Jinjuan Ren, Q. J. Li, Y. F. Zhao, M. T. Yang, Jianglai Liu, R. Han, D. W. Liu, Minfang Yeh, G. Y. Yu, Dejun Li, L. H. Whitehead, Guisen Li, Li Chang, Y. B. Hsiung, S. S. Liu, Jiawen Zhang, Z. Y. Yu, Y. Ma, Honghan Gong, Z. Y. Deng, Xin Qian, Y. S. Yeh, Xiao-yan Li, B. Roskovec, A. Higuera, Zhi-zhong Xing, J. Lee, Jen-Chieh Peng, X. Xia, Z. P. Zhang, X. L. Ji, Siew Cheng Wong, Lin Yang, J. B. Jiao, J. F. Chang, H. L. H. Wong, Y. X. Zhang, X. P. Ji, L. E. Piilonen, H. Y. Wei, J. J. Cherwinka, Xingtao Huang, Jiaheng Zou, Qingmin Zhang, K. L. Jen, Jinmei Liu, Jing Zhao, M. Bishai, Y. H. Chang, Changgen Yang, L. Lebanowski, Y. Wang, B. B. Shao, Yaping Cheng, Q. Y. Chen, Y. Y. Ding, X. Y. Ma, J. Y. Xu, H. Q. Lu, K. V. Tsang, E. T. Worcester, C. Lu, J. L. Xu, Jim Napolitano, Patrick Huber, J. Yan, J. K. Xia, F. Z. Qi, H. Y. Ngai, R. L. Gill, I. Mitchell, Y. C. Tung, L. M. Hu, Qinglong Wu, Kam Biu Luk, E. Naumova, D. A. Dwyer, T. Kwok, Guey-Lin Lin, L. S. Littenberg, J. de Arcos, T. J. Langford, Lawrence Pinsky, P. Jaffke, R. T. Lei, S. Jetter, Zhiyuan Wang, Jonathan S. Lu, Xuefeng Ding, Li Zhou, H. M. Steiner, K. K. Kwan, Ilya Butorov, T. Hu, Tian Xue, Rupert Leitner, Zhi Ning, A. B. Balantekin, H. H. Zhang, M. V. Diwan, Richard Rosero, J. Xu, D. M. Xia, C. H. Wang, F. Li, C. E. Tull, Michael Kramer, V. Pec, P. Y. Lin, X. Q. Li, Y. K. Heng, Qiumei Ma, S. Hans, A. G. Olshevski, Chun S. J. Pun, Y. Nakajima, J. Park, N. Viaux, B. R. Littlejohn, Shaomin Chen, Jun Cao, W. R. Cen, S. J. Patton, M. W. Kwok, Wenjie Wang, W. Q. Gu, Hanxiong Huang, L. Kang, J. Cummings, R. D. McKeown, J. K. C. Leung, Changjian Lin, C. A. Lewis, W. L. Zhong, Kwok Yin Leung, Dmitry V. Naumov, J. Monari Kebwaro, B. Z. Hu, Vit Vorobel, H. Liu, K. Whisnant, Z. B. Li, H. L. Zhuang, M. Qi, S. R. Ely, E. Draeger, G. X. Sun, Yi Chen, Wei Li, K. M. Heeger, Mengsu Yang, Zhijian Zhang, L. Zheng, Y. Xu, E. C. Huang, J. J. Ling, Yu-leung Chan, K. Lau, W. Tang, Christopher G. White, Q. W. Zhao, Yufeng Li, Bing-Lin Young, N. Y. Wang, B. Viren, Zhiyong Zhang, J. L. Sun, D. E. Jaffe, F. P. An, B. Ren, S. L. Zang, J. M. Link, Y. K. Hor, L. Guo, J. Cheng, D. A. Martinez Caicedo, Yaolin Zhao, Yue Meng, Chao Zhang, L. J. Hu, R. G. Wang, Liang Zhan, W. R. Edwards, Simon Blyth, M. Z. Wang, Ming Chung Chu, W. Hu, Juan Pedro Ochoa-Ricoux, H. R. Band, H. Liang, Yixue Chen, N. Raper, Marco Grassi, Miao He, T. Wise, H. Themann, Guanghua Gong, Ning Zhou, Y. M. Zhang, W. H. Wang, R. W. Hackenburg, and Z. Wang
Subjects: Physics, Particle physics, Physics - Instrumentation and Detectors, Oscillation, Detector, General Physics and Astronomy, FOS: Physical sciences, Daya Bay Reactor Neutrino Experiment, Instrumentation and Detectors (physics.ins-det), Spectral line, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Calibration, Nuclear Experiment (nucl-ex), Neutrino oscillation, Electron neutrino, Nuclear Experiment, Energy (signal processing)
Abstract: We report a new measurement of electron antineutrino disappearance using the fully-constructed Daya Bay Reactor Neutrino Experiment. The final two of eight antineutrino detectors were installed in the summer of 2012. Including the 404 days of data collected from October 2012 to November 2013 resulted in a total exposure of 6.9$\times$10$^5$ GW$_{\rm th}$-ton-days, a 3.6 times increase over our previous results. Improvements in energy calibration limited variations between detectors to 0.2%. Removal of six $^{241}$Am-$^{13}$C radioactive calibration sources reduced the background by a factor of two for the detectors in the experimental hall furthest from the reactors. Direct prediction of the antineutrino signal in the far detectors based on the measurements in the near detectors explicitly minimized the dependence of the measurement on models of reactor antineutrino emission. The uncertainties in our estimates of $\sin^{2}2\theta_{13}$ and $|\Delta m^2_{ee}|$ were halved as a result of these improvements. Analysis of the relative antineutrino rates and energy spectra between detectors gave $\sin^{2}2\theta_{13} = 0.084\pm0.005$ and $|\Delta m^{2}_{ee}|= (2.42\pm0.11) \times 10^{-3}$ eV$^2$ in the three-neutrino framework., Comment: Updated to match final published version
Published: 2015

35. LUX-ZEPLIN (LZ) Conceptual Design Report

Author: V. B. Francis, A. Bernstein, A. Manalaysay, C. Chan, C. E. Tull, Eli Woods, B. N. Ratcliff, Ethan Bernard, R. W. Schnee, N.A. Larsen, V.V. Sosnovtsev, Elena Korolkova, M. Sarychev, James Nikkel, J. J. Cherwinka, S. Luitz, Peter Majewski, J.S. Saba, Henrique Araujo, D. White, B. N. Edwards, W. H. Lippincott, F. G. O'Neill, A. Khazov, X. Ji, M. E. Monzani, B. Holbrook, K. O'Sullivan, Laura Manenti, J. Liu, P.R. Scovell, D.C. Malling, E. M. Boulton, M. G. D. van der Grinten, W.L. Waldron, W. C. Taylor, D. S. Akerib, C. R. Hall, Mikkel B. Johnson, F.L.H. Wolfs, J. Lin, Matthew Szydagis, J. Balajthy, K. J. Palladino, T. P. Biesiadzinski, H. Kraus, A. Currie, C. E. Dahl, R. Bunker, E. K. Pease, C. Silva, V. N. Solovov, J. Thomson, M. R. While, A. Dobi, H. N. Nelson, T. J. Sumner, K. C. Oliver-Mallory, W. H. To, I. Stancu, S. Stephenson, M. Pangilinan, T. J. Whitis, R. Bramante, K. E. Boast, T.J. Martin, L. Tvrznikova, A. Lindote, Patrick Bauer, J. O'Dell, L. Wang, D. Woodward, V. A. Kudryavtsev, H.J. Krebs, M. Elnimr, D. R. Tiedt, J.P. Rodrigues, J. Busenitz, Hoff, S. Kyre, F. Neves, L. Reichhart, C. Fu, Wolfgang Lorenzon, C. Rhyne, W. J. Wisniewski, M.J. Barry, C. M. Ignarra, M. C. Carmona-Benitez, W. Skulski, W. R. Edwards, Carl W. Akerlof, R. J. Gaitskell, S. Balashov, Michael Schubnell, Olevitch, S. J. Patton, B. P. Tennyson, M. F. Marzioni, D. Khaitan, R. L. Mannino, K. Kamdin, W. Craddock, S. D. Worm, V. M. Gehman, Y. Ju, A. J. Bailey, Daniel McKinsey, B. G. Lenardo, P. Beltrame, H. J. Rose, Minfang Yeh, Sergey Burdin, R.M. Gerhard, X. Liu, K. Skarpaas, S. A. Hertel, E. Druszkiewicz, A. St. J. Murphy, T.M. Stiegler, T.W. Hurteau, K.J. Thomas, J. Yin, A. Tomás, K. Kazkaz, C. Chiller, S. Powell, M. Cascella, T. J. R. Davison, Chao Zhang, A.A. Chiller, T. A. Shutt, J. A. Morad, J. Reichenbacher, J. E. Y. Dobson, R. M. Preece, N.J. Gantos, S. J. Haselschwardt, S. Uvarov, S.K. Young, M. G. D. Gilchriese, M.I. Lopes, Ben Carlson, J. Va’vra, J. E. Cutter, A.V. Khromov, C. Carels, Alexander Bolozdynya, V. Bugaev, R.G. Jacobsen, A. Harris, Wenzhao Wei, D. J. Taylor, D.Yu. Akimov, Dongming Mei, Duncan Carlsmith, Witherell, E. Holtom, W. Ji, C. H. Faham, S. Alsum, F.-T. Liao, D. Q. Huang, C. Ghag, C. O. Vuosalo, Bhawna Gomber, Mani Tripathi, Richard Rosero, R. C. Webb, L. de Viveiros, W. T. Emmet, Sridhara Dasu, S. Fiorucci, J.P. da Cunha, P. A. Terman, X. Bai, D. Markley, J. Mock, A. V. Kumpan, M.R. Stark, P. Sorensen, Yue Meng, K. T. Lesko, C. Lee, E. H. Miller, S. Shaw, A. Piepke, K. Sundarnath, A. Konovalov, T. K. Edberg, K. Pushkin, P. Ford, J. H. Buckley, and J.R. Verbus
Subjects: Physics, Particle physics, Expected cost, hep-ex, 010308 nuclear & particles physics, Technical systems, Detector, 01 natural sciences, 7. Clean energy, Particle detector, Nuclear physics, Conceptual design, Weakly interacting massive particles, 0103 physical sciences, 010306 general physics, physics.ins-det, astro-ph.IM
Abstract: The design and performance of the LUX-ZEPLIN (LZ) detector is described as of March 2015 in this Conceptual Design Report. LZ is a second-generation dark-matter detector with the potential for unprecedented sensitivity to weakly interacting massive particles (WIMPs) of masses from a few GeV/c2 to hundreds of TeV/c2. With total liquid xenon mass of about 10 tonnes, LZ will be the most sensitive experiment for WIMPs in this mass region by the end of the decade. This report describes in detail the design of the LZ technical systems. Expected backgrounds are quantified and the performance of the experiment is presented. The LZ detector will be located at the Sanford Underground Research Facility in South Dakota. The organization of the LZ Project and a summary of the expected cost and current schedule are given.
Published: 2015
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36. The muon system of the Daya Bay Reactor antineutrino experiment

Author: A. B. Balantekin, V. Pec, P. Y. Lin, S. Hans, I. Mitchell, Li Chang, Yi Wei, W. R. Edwards, Juan Pedro Ochoa-Ricoux, H. Liu, Y. B. Hsiung, Christopher G. White, E. Dale, Changgen Yang, K. Zhang, E. C. Huang, Miao He, X. C. Chen, E. Naumova, D. A. Dwyer, Jiawen Zhang, H. M. Steiner, W. C. Lai, Lin Yang, P. Hinrichs, C. Pearson, Jing Zhao, Q. W. Zhao, Bing-Lin Young, Jeremiah Monari Kebwaro, Xin Qian, X. Y. Ma, H. Themann, C. Lu, Zhongyuan Zhou, J. L. Xu, G. X. Sun, Chun S. J. Pun, H. Z. Huang, Guanghua Gong, J. Goett, J. Y. Xu, B. B. Shao, Tao Hu, H. Y. Wei, Y. C. Tung, S. K. Lin, Shaomin Chen, X. C. Ruan, Jun Cao, Xiao-yan Li, Steve Virostek, S. J. Patton, W. Q. Gu, L. Kang, Y. Xu, Y. M. Zhang, H. R. Band, J. K. C. Leung, N. Y. Wang, B. Viren, Vit Vorobel, Zhi-zhong Xing, H. Liang, Yixue Chen, H. S. Chen, Rupert Leitner, M. C. McFarlane, Z. Isvan, Dmitry V. Naumov, Wei Li, R. G. Wang, L. S. Wang, T. Kwok, Guey-Lin Lin, Zeyuan Yu, J. B. Jiao, H. Q. Lu, Liangjian Wen, Guofu Cao, M. V. Diwan, Xiaohu Guo, Y. H. Zhang, Liang Zhan, L. H. Whitehead, J. Y. Fu, N. Raper, T. Wise, Zhiyong Zhang, K. T. McDonald, R. T. Lei, X. Q. Li, M. T. Yang, B. R. Littlejohn, G. Y. Yu, E. Draeger, Qinglong Wu, Kam Biu Luk, D. M. Webber, S. J. Chen, X. P. Ji, R. H.M. Tsang, S. H. Kettell, X. B. Ma, X. F. Du, Wei Wang, Y. K. Hor, Patrick Huber, H. L. Zhuang, Jianglai Liu, X. L. Ji, Y. Ma, L. Z. Wang, J. Xu, Y. H. Tam, Jinjuan Ren, X. Wang, J. J. Cherwinka, X. Tang, J. F. Chang, Min-Xin Guan, Chao Zhang, Yu-leung Chan, S. H. Zhang, D. M. Xia, Z. D. Wang, Y. Wang, Q. J. Li, G. H. Han, Dejun Li, Y. Zhao, J. L. Sun, Qingmin Zhang, D. Mohapatra, Maxim Gonchar, Tian Xue, Q. Y. Chen, C. R. Newsom, Li Zhou, C. Chasman, Y. P. Cheng, F. H. Zhang, E. T. Worcester, Jim Napolitano, Y. H. Chang, Guisen Li, H. X. Huang, Honghan Gong, Z. Y. Deng, Z. P. Zhang, Y. B. Liu, J. de Arcos, R. A. Johnson, H. J. Jiang, Y. K. Heng, R. W. Hackenburg, W. K. Ngai, Z. Wang, Changjian Lin, R. Carr, Qingming Ma, D. E. Jaffe, J. L. Liu, Siew Cheng Wong, C. A. Lewis, S. L. Zang, Jiaheng Zou, K. Whisnant, L. Q. Ge, C. H. Wang, Richard Rosero, Y. Nakajima, M. W. Kwok, Wenjie Wang, K. V. Tsang, Lawrence Pinsky, L. Y. Wang, Yue Meng, L. J. Hu, S. S. Liu, Igor Nemchenok, Zhijian Zhang, L. Zheng, J. Lee, F. P. An, B. Ren, H. L. H. Wong, Y. X. Zhang, A. Leung, M. H. Ye, J. Yan, H. Y. Ngai, R. L. Gill, G. Hussain, Michael Kramer, C. E. Tull, Jin Yu, R. D. McKeown, F. Z. Qi, J. E. Morgan, Jen-Chieh Peng, X. Xia, J. M. Link, J. P. Cummings, L. M. Hu, P. Jaffke, W. Beriguete, R. E. Brown, Huo Yan Chen, Xingtao Huang, Y. Z.B. Li, L. S. Littenberg, Zhi Ning, L. Lebanowski, Y. Y. Ding, Kwong Lau, J. Wilhelmi, Xiaoyuan Chen, K. K. Kwan, Ilya Butorov, Mengsu Yang, W. Zhong, A. G. Olshevski, Guo-Lin Xu, Yi Chen, Q. He, B. Z. Hu, F. Li, Simon Blyth, M. Z. Wang, Ming Chung Chu, W. Hu, K. M. Heeger, J. K. Xia, Wing-Hon Lai, M. Qi, S. R. Ely, D. W. Liu, Minfang Yeh, M. Bishai, B. Roskovec, Yaolin Zhao, L. E. Piilonen, S. Jetter, and Y. S. Yeh
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, Physics - Instrumentation and Detectors, Muon, Physics::Instrumentation and Detectors, Shields, FOS: Physical sciences, Cosmic ray, Daya Bay Reactor Neutrino Experiment, Instrumentation and Detectors (physics.ins-det), Nuclear reactor, High Energy Physics - Experiment, law.invention, Nuclear physics, High Energy Physics - Experiment (hep-ex), law, High Energy Physics::Experiment, Neutrino, Instrumentation, Cherenkov radiation
Abstract: The Daya Bay experiment consists of functionally identical antineutrino detectors immersed in pools of ultrapure water in three well-separated underground experimental halls near two nuclear reactor complexes. These pools serve both as shields against natural, low-energy radiation, and as water Cherenkov detectors that efficiently detect cosmic muons using arrays of photomultiplier tubes. Each pool is covered by a plane of resistive plate chambers as an additional means of detecting muons. Design, construction, operation, and performance of these muon detectors are described., Comment: 13 pages, 22 figures, to appear as NIM-A 773 (2015) 8-20
Published: 2015

37. Background Radiation Measurements at High Power Research Reactors

Author: S. Morrell, H. Yao, D. Davee, Ke Han, N.T. Stemen, Rui-Lin Chu, Christopher B. Williams, C.D. Bass, D. Martinez, R. L. Varner, Chao Zhang, S. H. Kettell, D. A. Dwyer, T. J. Langford, T. Classen, B. Balantekin, Minfang Yeh, Wei Wang, J. Dolph, J. Ashenfelter, Nathaniel Bowden, B. Heffron, G. Barclay, Hans P. Mumm, G. Deichert, M. P. Green, J. Wilhelmi, K. M. Heeger, T. Wise, H. R. Band, D. Berish, E. Romero, Y-R Yen, X. Zhang, Scott M. Watson, M. J. Dolinski, D. Norcini, Richard Rosero, C. Baldenegro, A. Glenn, A. Galindo-Uribarri, B. R. Littlejohn, L. Saldaña, B. Seilhan, Dmitry A. Pushin, P. T. Surukuchi, P. E. Mueller, D. J. Dean, Jim Napolitano, J.K. Gaison, R. D. McKeown, D. E. Jaffe, Christopher G. White, B. R. White, S. Fan, R. Sharma, J. J. Cherwinka, K. Gilje, Scott J. Thompson, S. Hans, and C. D. Bryan
Subjects: Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Nuclear engineering, FOS: Physical sciences, Atomic, 01 natural sciences, Background measurements, law.invention, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Particle and Plasma Physics, law, Neutron flux, 0103 physical sciences, Nuclear, Neutron, Nuclear Experiment (nucl-ex), 010306 general physics, Instrumentation, Nuclear Experiment, Background radiation, Physics, 010308 nuclear & particles physics, technology, industry, and agriculture, Molecular, Instrumentation and Detectors (physics.ins-det), Nuclear reactor, Reactor antineutrino detection, Nuclear & Particles Physics, Other Physical Sciences, Radiation flux, Research reactors, Astronomical and Space Sciences
Abstract: Research reactors host a wide range of activities that make use of the intense neutron fluxes generated at these facilities. Recent interest in performing measurements with relatively low event rates, e.g. reactor antineutrino detection, at these facilities necessitates a detailed understanding of background radiation fields. Both reactor-correlated and naturally occurring background sources are potentially important, even at levels well below those of importance for typical activities. Here we describe a comprehensive series of background assessments at three high-power research reactors, including $\gamma$-ray, neutron, and muon measurements. For each facility we describe the characteristics and identify the sources of the background fields encountered. The general understanding gained of background production mechanisms and their relationship to facility features will prove valuable for the planning of any sensitive measurement conducted therein., Comment: 26 pages, 28 figures. Accepted for publication in Nuclear Instruments and Methods A. v2 incorporates minor revisions requested by NIMA
Published: 2015
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38. Independent measurement of the neutrino mixing angleθ13via neutron capture on hydrogen at Daya Bay

Author: S. S. Liu, Xiaohui Qian, J. Lee, H. L. H. Wong, C. E. Tull, A. Leung, Y. C. Lin, J. Yan, H. Y. Ngai, R. L. Gill, M. Ye, G. Hussain, Richard Rosero, E. Naumova, D. A. Dwyer, L. S. Wang, Y. L. Chan, Y. S. Yeh, D. M. Webber, X. L. Ji, Jen-Chieh Peng, Lin Yang, X. Xia, Yi Wei, J. K. C. Leung, J. Y. Fu, T. Wise, H. M. Steiner, D. W. Liu, Minfang Yeh, Qiumei Ma, Jinmei Liu, Jing Zhao, X. Y. Ma, Y. Q. Ma, Qinglong Wu, Y. H. Tam, V. Pec, P. Y. Lin, S. Hans, Z. P. Zhang, Y. B. Liu, H. J. Jiang, Christopher C. Yang, M. Qi, S. R. Ely, J. Y. Xu, S. H. Kettell, X. B. Ma, X. Wang, M. W. Kwok, Wenjie Wang, B. Roskovec, Baoqing Zeng, I. Mitchell, M. Bishai, Z. M. Wang, Li Zhou, Qingmin Zhang, Xi Chen, H. S. Chen, Guisen Li, Haoqi Lu, Juan Pedro Ochoa-Ricoux, L. M. Hu, Tian Xue, W. L. Zhong, J. P. Cummings, Vit Vorobel, L. H. Whitehead, Michael Kramer, Q. Y. Chen, Dejun Li, Honghan Gong, Maxim Gonchar, D. E. Jaffe, Y. F. Wang, Z. Isvan, Ziyan Deng, Xinglong Li, Wei Li, H. Z. Huang, Jianglai Liu, L. S. Pinsky, R. A. Johnson, Chun S. J. Pun, Miao He, Yaping Cheng, Siew Cheng Wong, Jiawen Zhang, Y. K. Heng, S. J. Patton, W. Q. Gu, Christopher G. White, Shaomin Chen, Jun Cao, Jiaheng Zou, W. Wang, B. B. Shao, Mengyun Guan, W. C. Lai, S. L. Zang, Jin Yu, Yaolin Zhao, K. T. McDonald, Bin Ren, Jim Napolitano, H. Y. Wei, H. L. Zhuang, M. C. McFarlane, K. V. Tsang, R. H.M. Tsang, Li Chang, Zhiyong Zhang, H. Themann, Xiao Tang, Dmitry V. Naumov, Rupert Leitner, C. A. Lewis, Guanghua Gong, Y. B. Hsiung, R. D. McKeown, E. Draeger, Chi Lin, W. R. Edwards, J. F. Chang, T. Kwok, Guey-Lin Lin, K. Whisnant, M. V. Diwan, L. Y. Wang, Y. C. Tung, Y. Xu, Y. M. Zhang, X. T. Huang, F. Li, Y. K. Hor, J. J. Cherwinka, S. K. Lin, X. Q. Li, Zhongyuan Zhou, B. R. Littlejohn, Zhi-zhong Xing, P. Hinrichs, K. M. Heeger, Patrick Huber, Jinjuan Ren, Q. J. Li, C. Lu, X. C. Ruan, Y. Zhao, Jia Xu, Chao Zhang, X. F. Du, Bing-Lin Young, X. P. Ji, Yufeng Li, J. L. Xu, K. L. Jen, J. K. Xia, H. Liang, Yixue Chen, P. Jaffke, G. H. Han, B. Z. Hu, H. R. Band, Z. B. Li, W. Beriguete, Liangjian Wen, Guofu Cao, J. L. Sun, Simon Blyth, R. W. Hackenburg, Z. Wang, E. T. Worcester, F. Z. Qi, M. Z. Wang, Ming Chung Chu, J. de Arcos, T. Hu, W. Hu, Yan Zhang, A. B. Balantekin, L. Kang, N. Raper, L. E. Piilonen, F. H. Zhang, N. Y. Wang, B. Viren, H. Liu, X. H. Guo, C. H. Wang, S. Jetter, R. G. Wang, Y. H. Chang, Liang Zhan, Qingxian Zhang, M. T. Yang, Y. Nakajima, G. Y. Yu, Z. Y. Yu, S. H. Zhang, D. M. Xia, C. Chasman, J. B. Jiao, R. T. Lei, E. C. Huang, J. J. Ling, Q. W. Zhao, L. Q. Ge, Y. C. Zhang, Y. X. Zhang, L. Lebanowski, Y. Y. Ding, Yue Meng, Kam-Biu Luk, K. K. Kwan, L. J. Hu, Ilya Butorov, Fengpeng An, A. G. Olshevski, J. Monari Kebwaro, Yi Chen, Kwong Lau, G. X. Sun, Mengsu Yang, Igor Nemchenok, Zhijian Zhang, L. Zheng, J. M. Link, L. S. Littenberg, and Zhi Ning
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Hydrogen, Oscillation, Gamma ray, chemistry.chemical_element, Daya Bay Reactor Neutrino Experiment, Nuclear physics, Neutron capture, chemistry, Neutrino, Neutrino oscillation, Charged current
Abstract: A new measurement of the θ_(13) mixing angle has been obtained at the Daya Bay Reactor Neutrino Experiment via the detection of inverse beta decays tagged by neutron capture on hydrogen. The antineutrino events for hydrogen capture are distinct from those for gadolinium capture with largely different systematic uncertainties, allowing a determination independent of the gadolinium-capture result and an improvement on the precision of the θ_(13) measurement. With a 217-day antineutrino data set obtained with six antineutrino detectors and from six 2.9 GW_(th) reactors, the rate deficit observed at the far hall is interpreted as sin^2 2θ_(13) = 0.083±0.018 in the three-flavor oscillation model. When combined with the gadolinium-capture result from Daya Bay, we obtain sin^2 2θ_(13) = 0.089±0.008 as the final result for the six-antineutrino-detector configuration of the Daya Bay experiment.
Published: 2014
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39. Spectral Measurement of Electron Antineutrino Oscillation Amplitude and Frequency at Daya Bay

Author: J. B. Jiao, M. Qi, S. R. Ely, R. T. Lei, H. Z. Huang, M. Bishai, D. W. Liu, Minfang Yeh, V. Pec, S. Hans, Yk Hor, S. J. Patton, W. Q. Gu, H. S. Chen, W. L. Zhong, B. Roskovec, F. H. Zhang, H. X. Huang, F. Li, Jiawen Zhang, Xin Heng Guo, K. M. Heeger, Yi Wei, K. V. Tsang, Miao He, Michael Kramer, Z. P. Zhang, Y. B. Liu, H. J. Jiang, H. Y. Wei, Huo Yan Chen, Igor Nemchenok, Zhijian Zhang, L. Zheng, R. Carr, Y. P. Cheng, J. K. Xia, Xingtao Huang, R. G. Wang, Wing-Hon Lai, D. M. Webber, Changgen Yang, Y. Zhang, Xubo Ma, Jinjuan Ren, Q. J. Li, J. Napolitano, F. P. An, B. Ren, X. C. Chen, Y. H. Zhang, X. L. Ji, P. Hinrichs, Liang Zhan, R. W. Hackenburg, Z. Wang, Zheng Wang, Jin Yu, L. Q. Ge, B. B. Shao, Y. H. Tam, X. Wang, Zhongyuan Zhou, J. J. Cherwinka, T. Kwok, Guey-Lin Lin, Chun S. J. Pun, Haoqi Lu, Dejun Li, B. Z. Hu, Simon Blyth, K. Lau, Tao Hu, Rupert Leitner, Yue Meng, Kam-Biu Luk, S. H. Kettell, C. Lu, J. L. Xu, X. P. Ji, Y. A. Gornushkin, S. K. Lin, R. L. Brown, Y. C. Zhang, M. Z. Wang, L. J. Hu, L. S. Littenberg, Zhi Ning, Ming Chung Chu, W. Hu, Lawrence Pinsky, L. Lebanowski, Y. Y. Ding, Liangjian Wen, Qingmin Zhang, B. R. Littlejohn, X. F. Du, Shaomin Chen, Jun Cao, A. B. Balantekin, Zeyuan Yu, Y. Xu, E. C. Huang, Li Zhou, N. Y. Wang, J. L. Sun, L. E. Piilonen, K. T. McDonald, L. Y. Wang, Guofu Cao, M. C. McFarlane, Dmitry V. Naumov, L. Kang, W. C. Lai, B. Viren, Vit Vorobel, Q. W. Zhao, Maxim Gonchar, Z. Isvan, Wei Li, S. Jetter, R. A. Johnson, L. H. Whitehead, Xiaoyuan Chen, X. N. Li, R. H.M. Tsang, Richard Rosero, Yanchu Wang, X. Q. Li, H. Liu, J. M. Link, J. P. Cummings, K. K. Kwan, Ilya Butorov, M. V. Diwan, E. Draeger, J. J. Ling, Zhiyong Zhang, C. A. Lewis, H. L. Zhuang, A. G. Olshevski, Y. Nakajima, M. W. Kwok, Wenjie Wang, Mengsu Yang, K. Whisnant, E. T. Worcester, J. de Arcos, S. Trentalange, Guisen Li, Honghan Gong, Z. Y. Deng, W. K. Ngai, Qingming Ma, H. K. Tanaka, Yu-leung Chan, Qinglong Wu, Siew Cheng Wong, Min-Xin Guan, X. Tang, Yi Chen, W. P. Wang, Jiaheng Zou, Tian Xue, C. White, C. H. Wang, D. E. Jaffe, G. Y. Yu, Yufeng Li, Y. K. Heng, W. R. Edwards, Y. S. Yeh, S. L. Zang, J. K. C. Leung, Y. H. Chang, Zhibing Li, G. X. Sun, X. C. Ruan, L. M. Hu, Chao Zhang, G. H. Han, S. H. Zhang, D. M. Xia, C. Chasman, Y. B. Hsiung, Lin Yang, O. D. Tsai, Jinmei Liu, Jing Zhao, X. Y. Ma, J. Y. Xu, I. Mitchell, Y. C. Tung, L. S. Wang, S. J. Chen, Jianglai Liu, Xin Qian, R. L. Hahn, Zhi-zhong Xing, J. Y. Fu, T. Wise, L. Z. Wang, F. Z. Qi, J. F. Chang, Jen-Chieh Peng, X. Xia, H. Themann, Guanghua Gong, Chi Lin, P. Jaffke, W. Beriguete, Yi-Fang Zhao, M. H. Ye, Juan Pedro Ochoa-Ricoux, H. R. Band, H. Liang, Yixue Chen, N. Raper, C. E. Tull, G. Hussain, S. S. Liu, J. Lee, H. L. H. Wong, Y. X. Zhang, J. Xu, A. Leung, Y. C. Lin, J. Yan, R. D. McKeown, H. Y. Ngai, R. L. Gill, Patrick Huber, Bing-Lin Young, E. Naumova, D. A. Dwyer, H. M. Steiner, and Y. Q. Ma
Subjects: Physics, Oscillation, FOS: Physical sciences, General Physics and Astronomy, Daya Bay Reactor Neutrino Experiment, Electron, Spectral line, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Muon neutrino, Nuclear Experiment (nucl-ex), Nuclear Experiment, Oscillation amplitude, Electron neutrino, Energy (signal processing)
Abstract: A measurement of the energy dependence of antineutrino disappearance at the Daya Bay Reactor Neutrino Experiment is reported. Electron antineutrinos ($\overline{\nu}_{e}$) from six $2.9$ GW$_{\rm th}$ reactors were detected with six detectors deployed in two near (effective baselines 512 m and 561 m) and one far (1579 m) underground experimental halls. Using 217 days of data, 41589 (203809 and 92912) antineutrino candidates were detected in the far hall (near halls). An improved measurement of the oscillation amplitude $\sin^{2}2\theta_{13} = 0.090^{+0.008}_{-0.009} $ and the first direct measurement of the $\overline{\nu}_{e}$ mass-squared difference $|\Delta m^{2}_{ee}|= (2.59_{-0.20}^{+0.19}) \times 10^{-3}\ {\rm eV}^2 $ is obtained using the observed $\overline{\nu}_{e}$ rates and energy spectra in a three-neutrino framework. This value of $|\Delta m^{2}_{ee}|$ is consistent with $|\Delta m^{2}_{\mu\mu}|$ measured by muon neutrino disappearance, supporting the three-flavor oscillation model., Comment: As accepted for publication by Phys. Rev. Lett. including ancillary table
Published: 2014
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40. First data from DM-Ice17

Author: J. J. Cherwinka, Darren Grant, M. Kauer, L. Hsu, B. N. Reilly, Liang Yang, Albrecht Karle, S. M. Paling, P. Sandstrom, S. Telfer, Max Robinson, K. M. Heeger, V. A. Kudryavtsev, Reina H. Maruyama, Z. P. Pierpoint, Walter C. Pettus, A. J. F. Hubbard, N. J. C. Spooner, Francis Halzen, and Calum Michael Macdonald
Subjects: Physics, Nuclear and High Energy Physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Dark matter, Detector, Direct observation, FOS: Physical sciences, Astrophysics, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), WIMP, 0103 physical sciences, Detector array, 010306 general physics, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We report the first analysis of background data from DM-Ice17, a direct-detection dark matter experiment consisting of 17 kg of NaI(Tl) target material. It was codeployed with IceCube 2457 m deep in the South Pole glacial ice in December 2010 and is the first such detector operating in the Southern Hemisphere. The background rate in the 6.5 - 8.0 keVee region is measured to be 7.9 +/- 0.4 counts/day/keV/kg. This is consistent with the expected background from the detector assemblies with negligible contributions from the surrounding ice. The successful deployment and operation of DM-Ice17 establishes the South Pole ice as a viable location for future underground, low-background experiments in the Southern Hemisphere. The detector assembly and deployment are described here, as well as the analysis of the DM-Ice17 backgrounds based on data from the first two years of operation after commissioning, July 2011 - June 2013., matches PRD published version
Published: 2014

41. Search for a light sterile neutrino at daya bay

Author: Kirk T. McDonald, L. S. Wang, J. Y. Fu, A. G. Olshevski, E. Draeger, T. Wise, M. V. Diwan, H. L. Zhuang, Xi Chen, X. Q. Li, W. C. Lai, E. T. Worcester, F. Li, J. de Arcos, J. Monari Kebwaro, J. J. Cherwinka, Bing-Lin Young, Yi Chen, J. F. Chang, X. Tang, Jianglai Liu, R. H.M. Tsang, Y. Xu, E. C. Huang, Yu Zhang, Juan Pedro Ochoa-Ricoux, Yu-leung Chan, L. Lebanowski, Y. Y. Ding, Y. Zhao, C. H. Wang, Z. B. Li, S. H. Kettell, Yufeng Li, V. Pec, P. Y. Lin, J. J. Ling, E. Naumova, D. A. Dwyer, Q. W. Zhao, Yi Wei, S. Hans, Y. K. Hor, Marco Grassi, Miao He, K. K. Kwan, Ilya Butorov, Patrick Huber, G. X. Sun, Christopher C. Yang, Jen-Chieh Peng, X. C. Ruan, Y. S. Yeh, H. M. Steiner, Chao Zhang, Xin Qian, W. Zhong, C. A. Lewis, X. Xia, L. M. Hu, Lin Yang, G. H. Han, H. Themann, Jinmei Liu, K. B. Luk, Baoqing Zeng, J. B. Jiao, K. Whisnant, Maxim Gonchar, Xiao-yan Li, Guanghua Gong, Jing Zhao, D. E. Jaffe, Vit Vorobel, Z. Isvan, Chi Lin, Zhi-zhong Xing, X. Y. Ma, J. Y. Xu, S. L. Zang, A. B. Balantekin, Wei Li, I. Mitchell, R. A. Johnson, J. K. C. Leung, H. S. Chen, Jinjuan Ren, Q. J. Li, J. Xu, Y. C. Tung, X. P. Ji, Jiawen Zhang, H. Liu, Y. H. Tam, X. Wang, J. L. Sun, R. T. Lei, Qingmin Zhang, H. R. Band, H. Liang, Yixue Chen, Chun S. J. Pun, B. B. Shao, Haoqi Lu, Dejun Li, Q. X. Zhang, Shaomin Chen, Jun Cao, Q. Y. Chen, J. Cummings, H. Y. Wei, Zhiyong Zhang, Min-Xin Guan, Y. P. Cheng, Jim Napolitano, S. H. Zhang, Michael Kramer, D. M. Xia, M. C. McFarlane, Xubo Ma, R. W. Hackenburg, Li Chang, N. Raper, Dmitry V. Naumov, Xiaohu Guo, Z. Wang, Rupert Leitner, M. T. Yang, C. Chasman, Zeyuan Yu, W. R. Edwards, Jin Yu, Y. B. Hsiung, G. Y. Yu, T. Kwok, Guey-Lin Lin, L. Q. Ge, Qinglong Wu, R. D. McKeown, F. Z. Qi, Y. Ma, Zhongyuan Zhou, L. Kang, B. R. Littlejohn, Y. H. Chang, P. Jaffke, W. Beriguete, Y. Wang, X. F. Du, Tian Xue, Wei Wang, F. H. Zhang, Christopher G. White, Z. P. Zhang, Y. B. Liu, H. J. Jiang, H. Z. Huang, K. L. Jen, Y. K. Heng, Zheng Wang, S. J. Patton, W. Q. Gu, S. K. Lin, Liangjian Wen, Guofu Cao, Tao Hu, N. Y. Wang, R. G. Wang, D. M. Webber, X. L. Ji, Y. H. Zhang, Liang Zhan, G. Hussain, B. Viren, Li Zhou, C. E. Tull, S. S. Liu, J. Lee, H. L. H. Wong, Y. X. Zhang, A. Leung, Y. C. Lin, J. Yan, H. Y. Ngai, R. L. Gill, Richard Rosero, Y. Nakajima, M. W. Kwok, Wenjie Wang, K. V. Tsang, Lawrence Pinsky, L. Y. Wang, M. H. Ye, Guisen Li, Honghan Gong, Z. Y. Deng, Qingming Ma, Siew Cheng Wong, Jiaheng Zou, Igor Nemchenok, Zhijian Zhang, L. Zheng, F. P. An, B. Ren, Yue Meng, L. J. Hu, D. W. Liu, Minfang Yeh, B. Roskovec, J. K. Xia, K. M. Heeger, Kwong Lau, Mengsu Yang, Y. Zhang, P. Hinrichs, C. Lu, J. L. Xu, L. H. Whitehead, J. M. Link, Xingtao Huang, M. Qi, S. R. Ely, M. Bishai, Yaolin Zhao, L. S. Littenberg, Zhi Ning, B. Z. Hu, Simon Blyth, M. Z. Wang, Ming Chung Chu, W. Hu, L. E. Piilonen, and S. Jetter
Subjects: Physics, Sterile neutrino, Oscillation, Daya bay, FOS: Physical sciences, General Physics and Astronomy, Spectral distortion, Daya Bay Reactor Neutrino Experiment, Electron, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Neutrino, Neutrino oscillation
Abstract: A search for light sterile neutrino mixing was performed with the first 217 days of data from the Daya Bay Reactor Antineutrino Experiment. The experiment's unique configuration of multiple baselines from six 2.9~GW$_{\rm th}$ nuclear reactors to six antineutrino detectors deployed in two near (effective baselines 512~m and 561~m) and one far (1579~m) underground experimental halls makes it possible to test for oscillations to a fourth (sterile) neutrino in the $10^{\rm -3}~{\rm eV}^{2} < |\Delta m_{41}^{2}| < 0.3~{\rm eV}^{2}$ range. The relative spectral distortion due to electron antineutrino disappearance was found to be consistent with that of the three-flavor oscillation model. The derived limits on $\sin^22\theta_{14}$ cover the $10^{-3}~{\rm eV}^{2} \lesssim |\Delta m^{2}_{41}| \lesssim 0.1~{\rm eV}^{2}$ region, which was largely unexplored., Comment: 7 pages, 4 figures
Published: 2014

42. Assembly and Installation of the Daya Bay Antineutrino Detectors

Author: Changjian Lin, Nan Li, B. R. Littlejohn, W. Wang, Lei Yang, J. J. Cherwinka, X. C. Chen, C. A. Lewis, D. M. Webber, Juan Pedro Ochoa-Ricoux, Xiaoyuan Chen, A. Pagac, T. Wise, W. Zhong, P. Hinrichs, D. Wenman, L. Greenler, R. H.M. Tsang, E. Draeger, H. Themann, Kin Keung Kwan, J. Goett, H. L. Zhuang, W. Q. Gu, H. R. Band, M. Krämer, Kam Biu Luk, Y. Nakajima, X. L. Luo, Yuekun Heng, H. L. H. Wong, Li Kang, M. Wingert, Guisen Li, Q. Xiao, W. S. He, Y. Jin, R. L. Gill, S. F. Li, M. C. McFarlane, R. Carr, Zhijian Zhang, K. Shih, Z. M. Wang, J. Wilhelmi, M. Hoff, M. W. Kwok, K. M. Heeger, Ming Chung Chu, K. V. Tsang, Yi Wei, R. L. Brown, Liangjian Wen, Herbert M. Steiner, Xin Qian, Xiao-yan Li, Steve Virostek, B. Seilhan, Lu Wang, W. R. Edwards, D. A. Dwyer, R. D. McKeown, T. H. Ho, X. Tang, Jinmei Liu, X. Y. Ma, S H Kettell, Y. B. Hsiung, and F. F. Wu
Subjects: Physics - Instrumentation and Detectors, business.industry, Physics::Instrumentation and Detectors, Daya bay, Nuclear engineering, Detector, FOS: Physical sciences, Flux, Instrumentation and Detectors (physics.ins-det), Nuclear power, Physics::Geophysics, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Neutrino detector, Environmental science, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Neutrino, business, Nuclear Experiment, Instrumentation, Mathematical Physics
Abstract: The Daya Bay reactor antineutrino experiment is designed to make a precision measurement of the neutrino mixing angle theta13, and recently made the definitive discovery of its nonzero value. It utilizes a set of eight, functionally identical antineutrino detectors to measure the reactor flux and spectrum at baselines of 300 - 2000m from the Daya Bay and Ling Ao Nuclear Power Plants. The Daya Bay antineutrino detectors were built in an above-ground facility and deployed side-by-side at three underground experimental sites near and far from the nuclear reactors. This configuration allows the experiment to make a precision measurement of reactor antineutrino disappearance over km-long baselines and reduces relative systematic uncertainties between detectors and nuclear reactors. This paper describes the assembly and installation of the Daya Bay antineutrino detectors., 31 pages, 19 figures
Published: 2013
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43. Target Mass Monitoring and Instrumentation in the Daya Bay Antineutrino Detectors

Author: P. Hinrichs, H. R. Band, Li Yang, J. J. Cherwinka, Wei Wang, Yadong Wei, Shengxin Lin, Shanfeng Li, D. M. Webber, L. Greenler, Zhijian Zhang, C. A. Lewis, K. M. Heeger, M. C. McFarlane, Li Kang, T. Wise, and Q. Xiao
Subjects: Photomultiplier, Physics - Instrumentation and Detectors, business.industry, Physics::Instrumentation and Detectors, Capacitive sensing, Instrumentation, Detector, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Scintillator, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Optics, Inverse beta decay, Calibration, Environmental science, Ultrasonic sensor, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), business, Nuclear Experiment, Mathematical Physics
Abstract: The Daya Bay experiment measures sin^2 2{\theta}_13 using functionally identical antineutrino detectors located at distances of 300 to 2000 meters from the Daya Bay nuclear power complex. Each detector consists of three nested fluid volumes surrounded by photomultiplier tubes. These volumes are coupled to overflow tanks on top of the detector to allow for thermal expansion of the liquid. Antineutrinos are detected through the inverse beta decay reaction on the proton-rich scintillator target. A precise and continuous measurement of the detector's central target mass is achieved by monitoring the the fluid level in the overflow tanks with cameras and ultrasonic and capacitive sensors. In addition, the monitoring system records detector temperature and levelness at multiple positions. This monitoring information allows the precise determination of the detectors' effective number of target protons during data taking. We present the design, calibration, installation and in-situ tests of the Daya Bay real-time antineutrino detector monitoring sensors and readout electronics., Comment: 22 pages, 20 figures; accepted by JINST. Changes in v2: minor revisions to incorporate editorial feedback from JINST
Published: 2012

44. Observation of electron-antineutrino disappearance at Daya Bay

Author: D. M. Webber, X. Huang, A. Pagac, Y. Wang, Pu Huang, W. Q. Jiang, F. H. Zhang, L. Lebanowski, Y. Y. Ding, M. Qi, S. R. Ely, M. Bishai, H. X. Huang, J. J. Cherwinka, Tian Xue, H. C. Wong, Xuejun Liu, Y. A. Gornushkin, Guisen Li, Y. K. Heng, A. G. Olshevski, Xiaoyuan Chen, Yaolong Zhang, Yi Wei, Meng Wang, X. C. Chen, K. K. Kwan, Jianbin Xu, C. E. Tull, Yi Chen, Q. He, Li Zhou, Honghan Gong, Z. Y. Deng, E. Draeger, H. Themann, Guanghua Gong, P. Stoler, M. V. Diwan, W. K. Ngai, S. D. Fang, W. Zhong, H. L. Zhuang, K. T. McDonald, E. T. Worcester, Qingming Ma, J. K. C. Leung, Min-Xin Guan, B. R. Littlejohn, Chi Lin, L. E. Piilonen, T. Wise, Y. X. Chen, R. H.M. Tsang, W. C. Lai, Zhongyuan Zhou, S. Jetter, Q. J. Li, S. H. Kettell, K. Shih, Jiaheng Zou, Wai Ting Chan, C. White, H. Z. Huang, W. P. Wang, Igor Nemchenok, Zhijian Zhang, A. B. Balantekin, L. Zheng, Michael Kramer, C. A. Lewis, Xiaoyan Ma, B. Viren, Yufeng Li, L. Kang, B. B. Shao, C. R. Newsom, Vit Vorobel, S. J. Patton, W. Q. Gu, Richard Rosero, Lei Yang, Z. Isvan, K. Y. Leung, L. Q. Ge, D. Wenman, Guo-Lin Xu, Wei Li, J. E. Morgan, K. Whisnant, Y. H. Chang, D. Mohapatra, Maxim Gonchar, Joonho Lee, X. L. Ji, W. S. He, J. Napolitano, F. P. An, Wing-Hon Lai, X. B. Li, D. R. Beavis, L. S. Wang, Rupert Leitner, Zeyuan Yu, B. Z. Hu, T. Luo, Y. Xu, Chun S. J. Pun, S. Blyth, J. Goett, C. H. Wang, R. A. Johnson, K. Zhang, Shaomin Chen, Jun Cao, H. S. Chen, Zhenyu Zhang, Zhiyong Zhang, Ming Chung Chu, Bei Cai, V. Ghazikhanian, Changgen Yang, Y. Nakajima, Jiawen Zhang, M. W. Kwok, P. Hinrichs, K. Lau, Q. W. Zhao, S. F. Li, B. Seilhan, M. C. McFarlane, Y. B. Hsiung, R. W. Hackenburg, V. Pec, S. J. Chen, C. Liu, J. Cummings, Sa Liu, Yue Meng, Ching-Yao Lai, R. D. McKeown, Tao Hu, F. F. Wu, S. Hans, Jianglai Liu, T. H. Ho, F. Z. Qi, Dmitry V. Naumov, C. Lu, Minfang Yeh, J. Z. Bai, N. Y. Wang, X. N. Li, J. M. Link, J. J. Ling, Kam-Biu Luk, R. L. Brown, S. Trentalange, K. V. Tsang, J. B. Jiao, J. L. Xu, C. Pearson, Z. Wang, Y. S. Yeh, Xin Qian, Huo Yan Chen, X. F. Du, H. L. H. Wong, Y. X. Zhang, J. Wong, Zai-Wei Fu, Q. Wu, B. L. Young, B. Roskovec, Y. C. Lin, Lawrence S. Pinsky, Steve Virostek, Y. H. Tam, Y. K. Hor, T. Kwok, X. T. Huang, Guey-Lin Lin, Liangjian Wen, S. H. Zhang, D. M. Xia, Guofu Cao, W. Beriguete, Zhi-zhong Xing, L. S. Littenberg, Yi-Fang Zhao, L. Y. Wang, Chao Zhang, Patrick Huber, Zhi Ning, H. Y. Ngai, R. L. Gill, Jennifer S. Li, R. Carr, Y. B. Nie, X. Tang, Zhenyu Wang, J. Y. Fu, Xiang Li, F. Li, C. Chasman, Haoqi Lu, Jingjing Liang, Jen-Chieh Peng, B. W. Mayes, Lixin Dong, W. Xu, M. H. Ye, Y. B. Liu, J. Wilhelmi, H. J. Jiang, L. Z. Wang, X. P. Ji, J. L. Sun, J. F. Chang, O. D. Tsai, X. L. Luo, Xuan Wang, Jinmei Liu, Jing Zhao, X. Y. Ma, L. H. Ma, D. E. Jaffe, L. H. Whitehead, Q. Xiao, Shengxin Lin, K. M. Heeger, W. R. Edwards, K. Yip, Juan Pedro Ochoa-Ricoux, M. K.P. Lee, D. Oh, Miao He, B. Li, Y. Torun, C. A. Whitten, L. Greenler, R. G. Wang, Y. H. Zhang, Ting-Chi Wang, Liang Zhan, A. Luk, D. A. Dwyer, H. R. Band, H. Liang, H. M. Steiner, Q. X. Zhang, Y. Q. Ma, S. K. Lin, N. Raper, Brent J. Liu, H. K. Tanaka, Xiaohu Guo, X. S. Chen, Hongjun Liu, Zhibing Li, K. Boddy, R. L. Hahn, Qingmin Zhang, S. T. Xiang, G. X. Sun, X. C. Ruan, and D. W. Liu
Subjects: NOνA, Physics, Particle physics, T2K experiment, General Physics and Astronomy, FOS: Physical sciences, Daya Bay Reactor Neutrino Experiment, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Inverse beta decay, Neutrino, Neutrino oscillation, Electron neutrino, Jiangmen Underground Neutrino Observatory
Abstract: The Daya Bay Reactor Neutrino Experiment has measured a non-zero value for the neutrino mixing angle $\theta_{13}$ with a significance of 5.2 standard deviations. Antineutrinos from six 2.9 GW$_{\rm th}$ reactors were detected in six antineutrino detectors deployed in two near (flux-weighted baseline 470 m and 576 m) and one far (1648 m) underground experimental halls. With a 43,000 ton-GW_{\rm th}-day livetime exposure in 55 days, 10416 (80376) electron antineutrino candidates were detected at the far hall (near halls). The ratio of the observed to expected number of antineutrinos at the far hall is $R=0.940\pm 0.011({\rm stat}) \pm 0.004({\rm syst})$. A rate-only analysis finds $\sin^22\theta_{13}=0.092\pm 0.016({\rm stat})\pm0.005({\rm syst})$ in a three-neutrino framework., Comment: 5 figures. Version to appear in Phys. Rev. Lett
Published: 2012

45. A side-by-side comparison of Daya Bay antineutrino detectors

Author: O. D. Tsai, H. F. Hao, Jinmei Liu, Jing Zhao, X. Y. Ma, A. B. Balantekin, Minfang Yeh, J. Z. Bai, L. Kang, J. Y. Fu, Jiawen Zhang, Q. An, B. Roskovec, Liangquan Ge, D. Wenman, Sa Liu, C. H. Wang, Guisen Li, H. S. Chen, J. F. Chang, Honghan Gong, Z. Y. Deng, Patrick Huber, Q. Xiao, Shengxin Lin, Zai-Wei Fu, W. K. Ngai, Qingming Ma, F. Li, Rupert Leitner, Bing-Lin Young, T. Kwok, Guey-Lin Lin, J. Wilhelmi, Jiaheng Zou, D. E. Jaffe, Y. K. Hor, Vit Vorobel, L. Lebanowski, Y. Y. Ding, Guanghua Gong, Y. B. Hsiung, F. F. Wu, P. Stoler, Chi Lin, W. Beriguete, D. M. Webber, X. L. Ji, J. K. C. Leung, Chao Zhang, Wei Li, Xurong Chen, Xiaoyuan Chen, M. V. Diwan, X. Q. Li, S. D. Fang, G. X. Sun, X. C. Ruan, Y. S. Yeh, K. K. Kwan, X. L. Luo, L. H. Whitehead, S. Blyth, Y. Zhou, Zhiyong Zhang, R. G. Wang, Y. H. Zhang, Liang Zhan, A. Luk, J. J. Cherwinka, X. Tang, K. M. Heeger, K. V. Tsang, S. H. Kettell, L. H. Ma, Xuan Wang, X. C. Chen, A. G. Olshevski, D. W. Liu, Xuejun Liu, Z. B. Li, Kirk T. McDonald, R. W. Hackenburg, W. R. Edwards, Y. A. Gornushkin, T. Wise, Juan Pedro Ochoa-Ricoux, D. A. Dwyer, Z. Wang, Zhiyuan Wang, Zhongyuan Zhou, X. P. Ji, Li Zhou, X. F. Du, H. R. Band, Wei Wang, S. H. Zhang, D. Mohapatra, Maxim Gonchar, Lawrence Pinsky, D. M. Xia, H. M. Steiner, J. L. Sun, H. Liang, Y. Q. Ma, Y. C. Lin, Xiaohu Guo, L. Y. Wang, Yi Chen, Q. He, C. Chasman, R. A. Johnson, Wing-Hon Lai, X. B. Li, Yi Wei, Brent J. Liu, Jen-Chieh Peng, H. Z. Huang, V. Pec, Changgen Yang, P. Hinrichs, S. Trentalange, Richard Rosero, S. J. Patton, S. Hans, W. Q. Gu, Miao He, C. Lu, J. L. Xu, J. B. Xi, W. L. Zhong, Y. H. Sun, L. Greenler, B. B. Shao, J. Wong, Michael Kramer, Y. Nakajima, Min-Xin Guan, B. R. Littlejohn, M. W. Kwok, Haoqi Lu, Yagmur Torun, Qingmin Zhang, R. D. McKeown, T. H. Ho, F. Z. Qi, J. B. Jiao, Y. H. Chang, W. C. Lai, M. K.P. Lee, W. S. He, Chun S. J. Pun, Shaomin Chen, Jun Cao, S. F. Li, M. C. McFarlane, Ching-Yao Lai, Dmitry V. Naumov, E. Draeger, H. L. Zhuang, Christopher G. White, Yufeng Li, Jun Li, J. M. Link, J. P. Cummings, C. A. Lewis, K. Whisnant, L. S. Littenberg, H. K. Tanaka, Zhi Ning, Tian Xue, Y. K. Heng, Zhenyu Zhang, K. Lau, Tao Hu, N. Y. Wang, B. Viren, Kwok Yin Leung, Y. Xu, Q. W. Zhao, R. Carr, Y. B. Nie, B. W. Mayes, X. Huang, L. E. Piilonen, S. Jetter, K. Shih, R. H.M. Tsang, J. J. Ling, Guo-Lin Xu, W. Q. Jiang, Xin Qian, B. Z. Hu, Xiao-yan Li, R. L. Hahn, X. T. Huang, Zhi-zhong Xing, M. Z. Wang, Ming Chung Chu, Q. J. Li, Yaolong Zhang, C. E. Tull, M. Qi, S. R. Ely, C. R. Newsom, M. Bishai, Yaolin Zhao, Jianbin Xu, L. S. Wang, Zeyuan Yu, H. L. H. Wong, Y. X. Zhang, A. Pagac, B. Seilhan, Y. Wang, Pu Huang, S. J. Chen, Q. Wu, F. H. Zhang, H. X. Huang, Jianglai Liu, H. Y. Ngai, R. L. Gill, Igor Nemchenok, Zhijian Zhang, L. Zheng, J. Napolitano, F. P. An, Yue Meng, Kam-Biu Luk, Haifeng Zhao, M. H. Ye, S. K. Lin, R. L. Brown, Liangjian Wen, Guofu Cao, Y. B. Liu, H. J. Jiang, and Lin Yang
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Daya bay, Detector, FOS: Physical sciences, Daya Bay Reactor Neutrino Experiment, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Calibration, Neutrino, Nuclear Experiment (nucl-ex), 010306 general physics, Neutrino oscillation, Instrumentation, Nuclear Experiment
Abstract: The Daya Bay Reactor Neutrino Experiment is designed to determine precisely the neutrino mixing angle $\theta_{13}$ with a sensitivity better than 0.01 in the parameter sin$^22\theta_{13}$ at the 90% confidence level. To achieve this goal, the collaboration will build eight functionally identical antineutrino detectors. The first two detectors have been constructed, installed and commissioned in Experimental Hall 1, with steady data-taking beginning September 23, 2011. A comparison of the data collected over the subsequent three months indicates that the detectors are functionally identical, and that detector-related systematic uncertainties exceed requirements., Comment: 24 pages, 36 figures
Published: 2012

46. Leakage Tests of the Stainless Steel Vessels of the Antineutrino Detectors in the Daya Bay Reactor Neutrino Experiment

Author: H. R. Band, Honglin Zhuang, Xiaoyan Ma, K. M. Heeger, Xiaohui Chen, J. J. Cherwinka, Yuekun Heng, Lingshu Wang, Xiao Tang, Q. Xiao, and Xiaolan Luo
Subjects: Physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Daya bay, Detector, General Engineering, FOS: Physical sciences, Electron, Daya Bay Reactor Neutrino Experiment, Instrumentation and Detectors (physics.ins-det), Scintillator, High Energy Physics - Experiment, Physics::Geophysics, Nuclear physics, High Energy Physics - Experiment (hep-ex), General Materials Science, High Energy Physics::Experiment, Leakage test, Nuclear Experiment (nucl-ex), Nuclear Experiment, Cherenkov radiation, Leakage (electronics)
Abstract: The antineutrino detectors in the Daya Bay reactor neutrino experiment are liquid scintillator detectors designed to detect low energy particles from antineutrino interactions with high efficiency and low backgrounds. Since the antineutrino detector will be installed in a water Cherenkov cosmic ray veto detector and will run for 3 to 5 years, ensuring water tightness is critical to the successful operation of the antineutrino detectors. We choose a special method to seal the detector. Three leak checking methods have been employed to ensure the seal quality. This paper will describe the sealing method and leak testing results.
Published: 2012
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47. Low-Background Monitoring Cameras for the Daya Bay Antineutrino Detectors

Author: H. R. Band, Wei Wang, D. M. Webber, P. Hinrichs, K. M. Heeger, Q. Xiao, J. J. Cherwinka, T. Wise, and M. C. McFarlane
Subjects: Physics, Photomultiplier, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Daya bay, Nuclear engineering, Detector, FOS: Physical sciences, Daya Bay Reactor Neutrino Experiment, Instrumentation and Detectors (physics.ins-det), High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Systems design, High Energy Physics::Experiment, Neutrino, Neutrino oscillation, Instrumentation, Mathematical Physics
Abstract: The Daya Bay Reactor Neutrino Experiment is designed to measure the neutrino mixing angle theta13 to world-leading precision. The experiment deploys identical antineutrino detectors at distances of 400-1900m from six reactors in Daya Bay, China. Each detector incorporates two general-purpose monitoring cameras to ensure their safe construction, transportation and operation. The cameras must meet usage goals while satisfying stringent constraints on radioactivity, materials compatibility, interference and reliability. This article describes the system design, integration, operation and performance., Comment: 16 pages, 14 figures
Published: 2012
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48. Acrylic Target Vessels for a High-Precision Measurement of theta13 with the Daya Bay Antineutrino Detectors

Author: A. Pagac, R. L. Brown, Kam Biu Luk, B. Edwards, C. A. Lewis, T. H. Ho, Q. Xiao, Chunjie Wang, Wei Wang, T. Wise, J. J. Cherwinka, S. H. Kettell, Y. B. Hsiung, B. R. Littlejohn, Y. H. Chang, W. S. He, Jun Cao, X. N. Li, H. R. Band, L. Greenler, Yanchu Wang, K. M. Heeger, Honglin Zhuang, Minfang Yeh, and Yuekun Heng
Subjects: Physics - Instrumentation and Detectors, Fabrication, Daya bay, Nuclear engineering, Dark matter, Detector, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Environmental science, Neutrino, Instrumentation, Mathematical Physics
Abstract: This paper describes in detail the acrylic target vessels used to encapsulate the target and gamma catcher regions in the Daya Bay experiment's first pair of antineutrino detectors. We give an overview of the design, fabrication, shipping, and installation of the acrylic target vessels and their liquid overflow tanks. The acrylic quality assurance program and vessel characterization, which measures all geometric, optical, and material properties relevant to {\nu}e detection at Daya Bay are summarized. This paper is the technical reference for the Daya Bay acrylic vessels and can provide guidance in the design and use of acrylic components in future neutrino or dark matter experiments., Comment: 47 pages, 38 Figures, 14 Tables. Submitted to JINST
Published: 2012
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49. The Daya Bay antineutrino detector filling system and liquid mass measurement

Author: H. R. Band, D. Wenman, P. Hinrichs, M. C. McFarlane, K. M. Heeger, J. J. Cherwinka, Wei Wang, C. A. Lewis, D. M. Webber, H. Mattison, E. Draeger, T. Wise, and Q. Xiao
Subjects: Physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Detector, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Daya Bay Reactor Neutrino Experiment, Scintillator, Particle detector, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Neutrino detector, Inverse beta decay, Scintillation counter, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, Instrumentation, Mathematical Physics
Abstract: The Daya Bay Reactor Neutrino Experiment has measured the neutrino mixing angle \theta_{13} to world-leading precision. The experiment uses eight antineutrino detectors filled with 20-tons of gadolinium-doped liquid scintillator to detect antineutrinos emitted from the Daya Bay nuclear power plant through the inverse beta decay reaction. The precision measurement of sin^{2}2\theta_{13} relies on the relative antineutrino interaction rates between detectors at near (400 m) and far (roughly 1.8 km) distances from the nuclear reactors. The measured interaction rate in each detector is directly proportional to the number of protons in the liquid scintillator target. A precision detector filling system was developed to simultaneously fill the three liquid zones of the antineutrino detectors and measure the relative target mass between detectors to, Comment: 27 pages, 17 figures; accepted by JINST. v2 incorporates minor revisions requested by JINST
Published: 2013
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50. SDC Muon Barrel Toroid 1/9.197 Scale Test Model at SSC

Author: J. J. Cherwinka, R. H. Wands, C. W. Jeff Tseng, and Y. Gusakov
Subjects: Physics, Toroid, Muon, Physics::Instrumentation and Detectors, Nuclear engineering, Scale test, Barrel (horology), Computer Science::Software Engineering, Particle accelerator, Particle detector, law.invention, Superconducting Super Collider, law, Physics::Accelerator Physics, Scale model, Simulation
Abstract: The purpose of the scale model as shown in Figure 1 for the muon barrel toroid (MBT) is to discover any problems in the preliminary design1 associated with the fabrication, assembly and installation.
Published: 1994
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