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101. Search for Neutrinoless Double-Beta Decay with the Complete EXO-200 Dataset

Author

D. R. Yahne, B. T. Cleveland, A. Kuchenkov, V.N. Stekhanov, C. Chambers, J. Watkins, J. Farine, C. R. Hall, A. Dolgolenko, D. Fudenberg, A. Craycraft, Peter Fierlinger, Gerrit Wrede, M. Tarka, J. Hoessl, Jens Dilling, D. Ruddell, V. Belov, I. Badhrees, L. Darroch, R. MacLellan, A. Robinson, A. Karelin, Qing Xia, Thilo Michel, J. Runge, Yuehe Lin, A. Odian, M. Hughes, R. DeVoe, M. Wagenpfeil, U. Wichoski, L. J. Kaufman, I. Ostrovskiy, Z. Li, B. G. Lenardo, Petr Vogel, A. Pocar, T. Ziegler, M. Danilov, T. Brunner, David Leonard, Giorgio Gratta, A. Piepke, J. Todd, A. Larson, O. Nusair, R. Krücken, P. S. Barbeau, O. Njoya, Thomas Koffas, K. S. Kumar, S. X. Wu, David Moore, J. L. Vuilleumier, W. M. Fairbank, O. Ya. Zeldovich, A. Iverson, M. J. Dolinski, P. Gautam, Shu Li, S. Schmidt, J. Davis, C. Jessiman, W. R. Cen, B. Mong, Y. Lan, R. Gornea, E. V. Hansen, T. Tolba, M. J. Jewell, F. Retiere, A. S. Johnson, Liang Yang, A. Jamil, M. Coon, Douglas H Beck, T. Daniels, Guofu Cao, Y-R Yen, S. Feyzbakhsh, Arun Kumar Soma, G. S. Li, P. Hufschmidt, David A. Sinclair, D. Fairbank, C. Licciardi, A. Der Mesrobian-Kabakian, J. Echevers, B. Veenstra, T. I. Totev, T. McElroy, L. J. Wen, Marc Weber, Martin Breidenbach, S. J. Daugherty, T. Bhatta, V. Veeraraghavan, K. Murray, Gisela Anton, P. C. Rowson, and S. Delaquis

Subjects
Physics, Q value, Resolution (electron density), Detector, General Physics and Astronomy, FOS: Physical sciences, 01 natural sciences, Lower limit, ddc, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Sensitivity (control systems), Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Energy (signal processing)
Abstract

A search for neutrinoless double-beta decay ($0\nu\beta\beta$) in $^{136}$Xe is performed with the full EXO-200 dataset using a deep neural network to discriminate between $0\nu\beta\beta$ and background events. Relative to previous analyses, the signal detection efficiency has been raised from 80.8% to 96.4$\pm$3.0% and the energy resolution of the detector at the Q-value of $^{136}$Xe $0\nu\beta\beta$ has been improved from $\sigma/E=1.23\%$ to $1.15\pm0.02\%$ with the upgraded detector. Accounting for the new data, the median 90% confidence level $0\nu\beta\beta$ half-life sensitivity for this analysis is $5.0 \cdot 10^{25}$ yr with a total $^{136}$Xe exposure of 234.1 kg$\cdot$yr. No statistically significant evidence for $0\nu\beta\beta$ is observed, leading to a lower limit on the $0\nu\beta\beta$ half-life of $3.5\cdot10^{25}$ yr at the 90% confidence level., Comment: v1, 7 pages, 5 figures; v2, fix references; v3, update to accepted version

Published
2019

102. Search for a dark photon in electroproduced $e^{+}e^{-}$ pairs with the Heavy Photon Search experiment at JLab

Author

Adrian, P.H., Baltzell, N.A., Battaglieri, M., Bondí, M., Boyarinov, S., Bueltmann, S., Burkert, V.D., Calvo, D., Carpinelli, M., Celentano, A., Charles, G., Colaneri, L., Cooper, W., Cuevas, C., D’Angelo, A., Dashyan, N., De Napoli, M., De Vita, R., Deur, A., Dupre, R., Egiyan, H., Elouadrhiri, L., Essig, R., Fadeyev, V., Field, C., Filippi, A., Freyberger, A., Garçon, M., Gevorgyan, N., Girod, F.X., Graf, N., Graham, M., Griffioen, K.A., Grillo, A., Guidal, M., Herbst, R., Holtrop, M., Jaros, J., Kalicy, G., Khandaker, M., Kubarovsky, V., Leonora, E., Livingston, K., Maruyama, T., McCarty, K., McCormick, J., McKinnon, B., Moffeit, K., Moreno, O., Munoz Camacho, C., Nelson, T., Niccolai, S., Odian, A., Oriunno, M., Osipenko, M., Paremuzyan, R., Paul, S., Randazzo, N., Raydo, B., Reese, B., Rizzo, A., Schuster, P., Sharabian, Y.G., Simi, G., Simonyan, A., Sipala, V., Sokhan, D., Solt, M., Stepanyan, S., Szumila-Vance, H., Toro, N., Uemura, S., Ungaro, M., Voskanyan, H., Weinstein, L.B., Wojtsekhowski, B., Yale, B., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, HPS, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Adrian, P, Baltzell, N, Battaglieri, M, Bondí, M, Boyarinov, S, Bueltmann, S, Burkert, V, Calvo, D, Carpinelli, M, Celentano, A, Charles, G, Colaneri, L, Cooper, W, Cuevas, C, D'Angelo, A, Dashyan, N, De Napoli, M, De Vita, R, Deur, A, Dupre, R, Egiyan, H, Elouadrhiri, L, Essig, R, Fadeyev, V, Field, C, Filippi, A, Freyberger, A, Garçon, M, Gevorgyan, N, Girod, F, Graf, N, Graham, M, Griffioen, K, Grillo, A, Guidal, M, Herbst, R, Holtrop, M, Jaros, J, Kalicy, G, Khandaker, M, Kubarovsky, V, Leonora, E, Livingston, K, Maruyama, T, Mccarty, K, Mccormick, J, Mckinnon, B, Moffeit, K, Moreno, O, Munoz Camacho, C, Nelson, T, Niccolai, S, Odian, A, Oriunno, M, Osipenko, M, Paremuzyan, R, Paul, S, Randazzo, N, Raydo, B, Reese, B, Rizzo, A, Schuster, P, Sharabian, Y, Simi, G, Simonyan, A, Sipala, V, Sokhan, D, Solt, M, Stepanyan, S, Szumila-Vance, H, Toro, N, Uemura, S, Ungaro, M, Voskanyan, H, Weinstein, L, Wojtsekhowski, B, and Yale, B

Subjects
photon: decay, photon: hidden sector, Physics and Astronomy (miscellaneous), accelerator, engineering, FOS: Physical sciences, S029HPH, coupling constant: upper limit, quantum electrodynamics: background, Newport News CEBAF Linac, photon: electroproduction, Settore FIS/04 - Fisica Nucleare e Subnucleare, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), photon: mass, photon: heavy, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], mass spectrum: (electron positron), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], luminosity: high, experimental results, Jefferson Lab
Abstract

The Heavy Photon Search experiment took its first data in a 2015 engineering run using a 1.056 GeV, 50 nA electron beam provided by CEBAF at the Thomas Jefferson National Accelerator Facility, searching for an electro-produced dark photon. Using 1.7 days (1170 nb$^{-1}$) of data, a search for a resonance in the $e^{+}e^{-}$ invariant mass distribution between 19 and 81 MeV/c$^2$ showed no evidence of dark photon decays above the large QED background, confirming earlier searches and demonstrating the full functionality of the experiment. Upper limits on the square of the coupling of the dark photon to the Standard Model photon are set at the level of 6$\times$10$^{-6}$. In addition, a search for displaced dark photon decays did not rule out any territory but resulted in a reliable analysis procedure that will probe hitherto unexplored parameter space with future, higher luminosity runs., Comment: 8 pages, Proceedings of the 39th International Conference on High Energy Physics (ICHEP 2018), 4-11 July, 2018, Seoul, Korea

Published
2018
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103. Overview of the ANITA project

Author

Seckel, D, Saltzberg, D, Odian, A, Naudet, C, Lowe, S, Learned, J, Kieda, D, Jacobson, A, Halzen, F, Gorham, P, Frichter, G, Evenson, P, DuVernois, M, Clem, J, Coutu, S, Beatty, J, Besson, D, Barwick, S, and Liewer, K. M

Abstract

UNKNOWN

Published
2002

104. Overview of the ANITA project

Author

Liewer, K. M, Barwick, S, Besson, D, Beatty, J, Coutu, S, Clem, J, DuVernois, M, Evenson, P, Frichter, G, Gorham, P, Halzen, F, Jacobson, A, Kieda, D, Learned, J, Lowe, S, Naudet, C, Odian, A, Saltzberg, D, and Seckel, D

Published
2002

105. Antarctic impulsive transient antenna (ANITA) instrumentation

Author

Naudet, C. J, Barwick, S, Besson, D, Beatty, J, Coutu, S, Clem, J, DuVernois, M, Evenson, P, Frichter, G, Gorham, P, Halzen, F, Jacobson, A, Kieda, D, Learned, J, Liewer, K, Lowe, S, Odian, A, Saltzberg, D, and Seckel, D

Published
2002

106. Antarctic impulsive transient antenna (ANITA) instrumentation

Author

Seckel, D, Saltzberg, D, Odian, A, Lowe, S, Liewer, K, Learned, J, Kieda, D, Jacobson, A, Halzen, F, Gorham, P, Frichter, G, Evenson, P, DuVernois, M, Clem, J, Coutu, S, Beatty, J, Besson, D, Barwick, S, and Naudet, C. J

Abstract

UNKNOWN

Published
2002

107. Overview of the ANITA project

Author

Liewer, K, Barwick, S, Beatty, J, Besson, D, Clem, J, Coutu, S, DuVernois, M, Evenson, P, Gorham, P, Halzen, F, Jacobson, A, Kieda, D, Learned, J, Liewer, K. M, Lowe, S, Naudet, C, Odian, A, Saltzberg, D, and Seckel, D

Published
2002

108. Characterization of the Hamamatsu VUV4 MPPCs for nEXO

Author

P. Giampa, G. Li, D. Kodroff, M. Wagenpfeil, J. Dalmasson, Eric W. Hoppe, N. Roy, David Leonard, J. Blatchford, Thomas Koffas, E. V. Hansen, W. M. Fairbank, P. Gautam, B. T. Cleveland, K. Odgers, L. Cao, Liang Yang, A. Jamil, S. Rescia, T. Stiegler, E. Raguzin, M. Elbeltagi, R. MacLellan, A. Kuchenkov, Arun Kumar Soma, F. Nolet, X.L. Sun, T. Bhatta, D. Fairbank, J. B. Zhao, T. McElroy, A. Larson, Jean-Francois Pratte, B. Mong, F. Vachon, Marc Weber, G. St-Hilaire, P. Margetak, P. Nakarmi, M. Chiu, J. Farine, J. Echevers, C. Chambers, G. Zhang, M. Oriunno, P. C. Rowson, A. Robinson, I. J. Arnquist, S. X. Wu, Douglas H Beck, Qing Xia, U. Wichoski, Ethan Brown, A. House, K. Murray, Y-R Yen, L. Darroch, G. S. Ortega, R. DeVoe, Gisela Anton, T. Ziegler, O. Zeldovich, J. P. Brodsky, T. I. Totev, M. Heffner, Qun-Yao Wang, T. Tolba, W. R. Cen, S. J. Daugherty, A. De St. Croix, G. Gallina, R. Gornea, Serge A. Charlebois, T. Rossignol, Zhijun Ning, M. Tarka, M. J. Jewell, Lorenzo Fabris, J. L. Vuilleumier, M. Walent, John L. Orrell, T. Daniels, R. Tsang, B. G. Lenardo, T. Brunner, K. Skarpaas, P. Lv, V. Veeraraghavan, A. Karelin, J. Todd, Y. Y. Ding, O. Nusair, R. Krücken, Veljko Radeka, Wei Wu, R.J. Newby, M. Hughes, R. Saldanha, S. Al Kharusi, Giorgio Gratta, Martin Ward, He-Run Yang, David Moore, M. Alfaris, S. Feyzbakhsh, A. Craycraft, Y. Ito, L. J. Kaufman, Y. Lan, Yuehe Lin, Z. Li, Samuele Sangiorgio, Wei Wei, F. Retière, K. S. Kumar, J. Hößl, P. S. Barbeau, V. A. Belov, Thilo Michel, J. Kroeger, Xuan Wu, A. Pocar, A. Piepke, V.N. Stekhanov, D. Qiu, M. Coon, Cory T. Overman, T. Tsang, Angelo Dragone, Gabriele Giacomini, Jens Dilling, I. Badhrees, S. Parent, A. Odian, I. Ostrovskiy, Gerard Visser, Mike Richman, O. Njoya, A. Iverson, Shu Li, J. Watkins, M. Medina-Peregrina, X. S. Jiang, C. Licciardi, A. Der Mesrobian-Kabakian, Yu-Guang Zhou, Liangjian Wen, Luca Doria, Guofu Cao, Rejean Fontaine, and M. J. Dolinski

Subjects
010302 applied physics, Physics, Nuclear and High Energy Physics, Scintillation, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Analytical chemistry, FOS: Physical sciences, chemistry.chemical_element, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, Xenon, chemistry, 0103 physical sciences, Saturation (graph theory), Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Instrumentation, Photon detection, Dark current
Abstract

In this paper we report on the characterization of the Hamamatsu VUV4 (S/N: S13370-6152) Vacuum Ultra-Violet (VUV) sensitive Multi-Pixel Photon Counters (MPPC)s as part of the development of a solution for the detection of liquid xenon scintillation light for the nEXO experiment. Various MPPC features, such as: dark noise, gain, correlated avalanches, direct crosstalk and Photon Detection Efficiency (PDE) were measured in a dedicated setup at TRIUMF. MPPCs were characterized in the range 163 K ≤ T ≤ 233 K . At an over voltage of 3 . 1 ± 0 . 2 V and at T = 163 K we report a number of Correlated Avalanches (CAs) per pulse in the 1 μ s interval following the trigger pulse of 0 . 161 ± 0 . 005 . At the same settings the Dark-Noise (DN) rate is 0 . 137 ± 0 . 002 Hz/mm 2 . Both the number of CAs and the DN rate are within nEXO specifications. The PDE of the Hamamatsu VUV4 was measured for two different devices at T = 233 K for a mean wavelength of 189 ± 7 nm . At 3 . 6 ± 0 . 2 V and 3 . 5 ± 0 . 2 V of over voltage we report a PDE of 13 . 4 ± 2 . 6 % and 11 ± 2 % , corresponding to a saturation PDE of 14 . 8 ± 2 . 8 % and 12 . 2 ± 2 . 3 % , respectively. Both values are well below the 24 % saturation PDE advertised by Hamamatsu. More generally, the second device tested at 3 . 5 ± 0 . 2 V of over voltage is below the nEXO PDE requirement. The first one instead yields a PDE that is marginally close to meeting the nEXO specifications. This suggests that with modest improvements the Hamamatsu VUV4 MPPCs could be considered as an alternative to the FBK-LF Silicon Photo-Multipliers for the final design of the nEXO detector.

Published
2019

109. Reflectance of Silicon Photomultipliers at Vacuum Ultraviolet Wavelengths

Author

E. Caden, S. Rescia, D. Fairbank, G. St-Hilaire, Thilo Michel, A. Craycraft, Jens Dilling, I. Badhrees, A. De St. Croix, X. S. Jiang, C. Licciardi, J. Farine, M. Walent, S. Feyzbakhsh, V. Belov, C.R. Natzke, B. G. Lenardo, A. Robinson, P. Nakarmi, A. Der Mesrobian-Kabakian, T. Brunner, L. Darroch, J. Echevers, Xuan Wu, S. Parent, A. Odian, A. Fucarino, Jean-Francois Pratte, Yu-Guang Zhou, E. Raguzin, T. Rossignol, Z. Li, O. Nusair, J. L. Vuilleumier, R. Krücken, M. Hughes, V. Veeraraghavan, M. J. Jewell, R. Saldanha, T. I. Totev, P. A. Breur, K. Skarpaas, Gerard Visser, S. Al Kharusi, I. Ostrovskiy, B. T. Cleveland, A. Kuchenkov, Liangjian Wen, Luca Doria, Guofu Cao, Samuele Sangiorgio, Wei Wei, K. S. Kumar, Mike Richman, David Moore, O. Njoya, A. Iverson, T. Bhatta, M. Chiu, G. S. Li, Thomas Tsang, Shu Li, Y. Lan, B. Chana, Douglas H Beck, L. Yang, M. Oriunno, J. P. Brodsky, P. S. Barbeau, He-Run Yang, R. DeVoe, K. Murray, J. Watkins, M. Tarka, Gisela Anton, R. Tsang, M. L. di Vacri, K. Odgers, M. J. Dolinski, M. Medina-Peregrina, C. Vivo-Vilches, F. Retiere, U. Wichoski, Sergio Ferrara, O. Zeldovich, K. G. Leach, T. Ziegler, R. Gornea, K. Deslandes, David Leonard, Giorgio Gratta, Thomas Koffas, W. M. Fairbank, Wei Wu, R.J. Newby, P. C. Rowson, T. Stiegler, M. Elbeltagi, Lorenzo Fabris, J. Hobl, A. House, N. Roy, L. Cao, F. Nolet, N. Massacret, T. McElroy, S. X. Wu, F. Vachon, C. Chambers, R. MacLellan, A. Pocar, V.N. Stekhanov, P. Gautam, F. Edaltafar, D. Goeldi, M. Coon, I. J. Arnquist, J. Runge, Cory T. Overman, M. Heffner, S. Viel, G. Gallina, Angelo Dragone, Gabriele Giacomini, P. Lv, A. Piepke, J. Todd, Y. Y. Ding, Veljko Radeka, T. Wager, Qun-Yao Wang, Zhijun Ning, E. V. Hansen, A. Jamil, Arun Kumar Soma, Qing Xia, S. Byrne Mamahit, Ethan Brown, A. Karelin, G. S. Ortega, M. Wagenpfeil, J. Dalmasson, X.L. Sun, J. B. Zhao, A. Larson, Serge A. Charlebois, John L. Orrell, T. Daniels, B. Mong, L. J. Kaufman, and Eric W. Hoppe

Subjects
Nuclear and High Energy Physics, Materials science, Physics - Instrumentation and Detectors, Silicon, chemistry.chemical_element, Photodetector, FOS: Physical sciences, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Xenon, Silicon photomultiplier, 0103 physical sciences, Wafer, Electrical and Electronic Engineering, 010308 nuclear & particles physics, business.industry, Instrumentation and Detectors (physics.ins-det), Nuclear Energy and Engineering, chemistry, Optoelectronics, Diffuse reflection, Photonics, business, Refractive index
Abstract

Characterization of the vacuum ultraviolet (VUV) reflectance of silicon photomultipliers (SiPMs) is important for large-scale SiPM-based photodetector systems. We report the angular dependence of the specular reflectance in a vacuum of SiPMs manufactured by Fondazionc Bruno Kessler (FBK) and Hamamatsu Photonics K.K. (HPK) over wavelengths ranging from 120 nm to 280 nm. Refractive index and extinction coefficient of the thin silicon-dioxide film deposited on the surface of the FBK SiPMs are derived from reflectance data of a FBK silicon wafer with the same deposited oxide film as SiPMs. The diffuse reflectance of SiPMs is also measured at 193 nm. We use the VUV spectral dependence of the optical constants to predict the reflectance of the FBK silicon wafer and FBK SiPMs in liquid xenon.

Published
2019
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110. Simulation of charge readout with segmented tiles in nEXO

Author

F. Retière, M. Medina-Peregrina, Venkatesh Veeraraghavan, J. Hößl, Gerard Visser, J. L. Vuilleumier, L. Darroch, M. Chiu, J. Watkins, V. A. Belov, Yang Haibo, A. De St. Croix, V. Radeka, D. Fairbank, T. McElroy, T. Bhatta, A. Pocar, D. S. Leonard, J. Echevers, E. Caden, A. Craycraft, R. DeVoe, Lorenzo Fabris, C. T. Overman, E. Raguzin, C. Vivo-Vilches, Qing Xia, M. J. Jewell, Xiaoyang Sun, R. Gornea, J. Dalmasson, S. Feyzbakhsh, P. Gautam, G. S. Ortega, A. Piepke, I. Ostrovskiy, P. Lv, M. Hughes, Thilo Michel, T. Ziegler, C.R. Natzke, Z. Ning, Xuan Wu, F. Vachon, Sergio Ferrara, Serge A. Charlebois, S. X. Wu, V.N. Stekhanov, M. Walent, S. Al Kharusi, J. B. Zhao, A. Larson, A. Der Mesrobian-Kabakian, A. E. Robinson, Mike Richman, B. G. Lenardo, T. Brunner, A. Fucarino, David Moore, N. Roy, L. Cao, F. Nolet, J. Todd, M. Heffner, D. Kodroff, T. Tolba, Jean-Francois Pratte, M. Oriunno, John L. Orrell, T. Daniels, B. Mong, Rejean Fontaine, Ethan Brown, Qian Wang, Y. Lan, K. Murray, G. Giacomini, T. Stiegler, O. Njoya, A. Iverson, K. Skarpaas Viii, Thomas Tsang, R. Saldanha, Shu Li, Y. Y. Ding, Z. Li, Gisela Anton, O. Zeldovich, Marc Weber, E. Hansen, A. Karelin, O. Nusair, R. Krücken, Jens Dilling, R. MacLellan, B. Chana, Giorgio Gratta, P. S. Barbeau, Yumei Zhou, I. Badhrees, R. Tsang, Martin Ward, T. I. Totev, D. Goeldi, M. Coon, Liangjian Wen, Douglas H Beck, Guofu Cao, Angelo Dragone, W. R. Cen, S. J. Daugherty, Thomas Koffas, Xiaoshan Jiang, W. M. Fairbank, M. Elbeltagi, Y-R Yen, S. Rescia, M. J. Dolinski, A. Odian, S. Parent, J. Runge, J. P. Brodsky, P. Nakarmi, U. Wichoski, S. Viel, C. Licciardi, G. Gallina, T. Rossignol, M. L. Di Vacri, L. J. Kaufman, Eric W. Hoppe, Liang Yang, A. Jamil, Arun Kumar Soma, Yuehe Lin, Samuele Sangiorgio, Wei Wei, K. S. Kumar, J. Farine, I. J. Arnquist, K. G. Leach, G. St-Hilaire, Wei Wu, R.J. Newby, P. C. Rowson, A. House, M. Tarka, G. Li, B. T. Cleveland, K. Odgers, A. Kuchenkov, M. Wagenpfeil, and C. Chambers

Subjects
Physics, Physics - Instrumentation and Detectors, Time projection chamber, 010308 nuclear & particles physics, Detector, chemistry.chemical_element, FOS: Physical sciences, Charge (physics), Instrumentation and Detectors (physics.ins-det), 01 natural sciences, 030218 nuclear medicine & medical imaging, Anode, Nuclear physics, 03 medical and health sciences, 0302 clinical medicine, Xenon, chemistry, Double beta decay, 0103 physical sciences, Beta (velocity), Sensitivity (control systems), Nuclear Experiment (nucl-ex), Nuclear Experiment, Instrumentation, Mathematical Physics
Abstract

nEXO is a proposed experiment to search for the neutrino-less double beta decay ($0\nu\beta\beta$) of $^{136}$Xe in a tonne-scale liquid xenon time projection chamber (TPC). The nEXO TPC will be equipped with charge collection tiles to form the anode. In this work, the charge reconstruction performance of this anode design is studied with a dedicated simulation package. A multi-variate method and a deep neural network are developed to distinguish simulated $0\nu\beta\beta$ signals from backgrounds arising from trace levels of natural radioactivity in the detector materials. These simulations indicate that the nEXO TPC with charge-collection tiles shows promising capability to discriminate the $0\nu\beta\beta$ signal from backgrounds. The estimated half-life sensitivity for $0\nu\beta\beta$ decay is improved by $\sim$20$~(32)\%$ with the multi-variate~(deep neural network) methods considered here, relative to the sensitivity estimated in the nEXO pre-conceptual design report.

Published
2019
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111. Reflectivity and PDE of VUV4 Hamamatsu SiPMs in Liquid Xenon

Author

Gerard Visser, M. Walent, B. G. Lenardo, T. Brunner, V. Veeraraghavan, T. Bhatta, Giorgio Gratta, F. Edaltafar, T. Rossignol, M. J. Jewell, J. Watkins, P. Nakarmi, Arun Kumar Soma, Ethan Brown, L. Darroch, O. Nusair, R. Krücken, S. X. Wu, David Leonard, J. Blatchford, E. Caden, Thomas Koffas, W. M. Fairbank, T. Stiegler, M. Elbeltagi, L. J. Kaufman, M. Hughes, X. S. Jiang, C. Licciardi, A. Craycraft, Eric W. Hoppe, S. Al Kharusi, A. Karelin, G. Gallina, P. Gautam, R. Saldanha, M. Chiu, J. L. Vuilleumier, T. Wager, A. Der Mesrobian-Kabakian, David Moore, C. Chambers, M. Oriunno, E. V. Hansen, M. Alfaris, M. Wagenpfeil, J. Dalmasson, Sergio Ferrara, R. MacLellan, Qun-Yao Wang, K. Murray, Gabriele Giacomini, I. J. Arnquist, Liang Yang, Y. Lan, U. Wichoski, C.R. Natzke, S. Feyzbakhsh, A. Jamil, Gisela Anton, J. Runge, Zhijun Ning, T. Ziegler, K. G. Leach, R. Tsang, X.L. Sun, J. B. Zhao, M. Heffner, K. Odgers, S. Viel, Wei Wu, R.J. Newby, A. Fucarino, A. Larson, Z. Li, B. Chana, Douglas H Beck, Samuele Sangiorgio, K. S. Kumar, Veljko Radeka, P. C. Rowson, A. House, N. Massacret, Jean-Francois Pratte, P. Lv, J. Todd, Angelo Dragone, B. Mong, Y. Y. Ding, M. Ward, T. I. Totev, G. S. Li, M. L. di Vacri, R. DeVoe, C. Vivo-Vilches, Qing Xia, S. Byrne Mamahit, G. S. Ortega, R. Fontaine, J. Farine, Serge A. Charlebois, John L. Orrell, T. Daniels, V. Belov, A. Robinson, N. Roy, L. Cao, F. Nolet, T. McElroy, F. Vachon, Marc Weber, A. De St. Croix, Lorenzo Fabris, B. T. Cleveland, D. Goeldi, M. Coon, A. Kuchenkov, Cory T. Overman, S. Rescia, D. Fairbank, G. St-Hilaire, J. P. Brodsky, He-Run Yang, A. Piepke, M. Tarka, V.N. Stekhanov, J. Echevers, A. Pocar, O. Zeldovich, Yu-Guang Zhou, Liangjian Wen, Luca Doria, Guofu Cao, Thilo Michel, Wei Wei, I. Ostrovskiy, M. J. Dolinski, E. Raguzin, P. A. Breur, Xuan Wu, Mike Richman, F. Retière, O. Njoya, A. Iverson, M. Medina-Peregrina, J. Hößl, K. Skarpaas Viii, P. S. Barbeau, Thomas Tsang, Shu Li, R. Gornea, Jens Dilling, I. Badhrees, S. Parent, and A. Odian

Subjects
Materials science, Physics - Instrumentation and Detectors, APDS, Physics::Instrumentation and Detectors, Photodetector, chemistry.chemical_element, FOS: Physical sciences, Photodetection, 01 natural sciences, 030218 nuclear medicine & medical imaging, law.invention, High Energy Physics - Experiment, 03 medical and health sciences, High Energy Physics - Experiment (hep-ex), 0302 clinical medicine, Silicon photomultiplier, Optics, Xenon, law, 0103 physical sciences, Specular reflection, Instrumentation, Mathematical Physics, Scintillation, 010308 nuclear & particles physics, business.industry, Instrumentation and Detectors (physics.ins-det), Wavelength, chemistry, business
Abstract

Understanding reflective properties of materials and photodetection efficiency (PDE) of photodetectors is important for optimizing energy resolution and sensitivity of the next generation neutrinoless double beta decay, direct detection dark matter, and neutrino oscillation experiments that will use noble liquid gases, such as nEXO, DARWIN, DarkSide-20k, and DUNE. Little information is currently available about reflectivity and PDE in liquid noble gases, because such measurements are difficult to conduct in a cryogenic environment and at short enough wavelengths. Here we report a measurement of specular reflectivity and relative PDE of Hamamatsu VUV4 silicon photomultipliers (SiPMs) with 50 micrometer micro-cells conducted with xenon scintillation light (~175 nm) in liquid xenon. The specular reflectivity at 15 deg. incidence of three samples of VUV4 SiPMs is found to be 30.4+/-1.4%, 28.6+/-1.3%, and 28.0+/-1.3%, respectively. The PDE at normal incidence differs by +/-8% (standard deviation) among the three devices. The angular dependence of the reflectivity and PDE was also measured for one of the SiPMs. Both the reflectivity and PDE decrease as the angle of incidence increases. This is the first measurement of an angular dependence of PDE and reflectivity of a SiPM in liquid xenon., Comment: 21 pages, 15 figures, 6 tables. As accepted by JINST

Published
2019
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112. Measurement of the scintillation and ionization response of liquid xenon at MeV energies in the EXO-200 experiment

Author

E. V. Hansen, D. Fudenberg, Liang Yang, A. Jamil, M. J. Jewell, L. Darroch, M. Wagenpfeil, Giorgio Gratta, M. J. Dolinski, P. Hufschmidt, David A. Sinclair, G. S. Li, Thilo Michel, D. Fairbank, J. L. Vuilleumier, M. Hughes, T. Bhatta, R. MacLellan, A.C. Odian, I. Ostrovskiy, A. Larson, T. Tolba, P. C. Rowson, C. Jessiman, A. Pocar, C. Licciardi, J. Echevers, B. Mong, O. Ya. Zeldovich, A. Der Mesrobian-Kabakian, R. Neilson, T. Brunner, S. Delaquis, L. J. Kaufman, T. McElroy, David Moore, A. Karelin, A. S. Johnson, J. Watkins, V. Veeraraghavan, L. J. Wen, Marc Weber, Arun Kumar Soma, V.N. Stekhanov, S. X. Wu, D. R. Yahne, C. R. Hall, R. DeVoe, A. Piepke, J. Todd, Martin Breidenbach, David Leonard, S. J. Daugherty, O. Njoya, J. Farine, A. Dolgolenko, A. Craycraft, D. Beck, Thomas Koffas, Qing Xia, D. Tosi, W. M. Fairbank, A. Iverson, C. Chambers, J. Hoessl, P. S. Barbeau, J. Runge, W. R. Cen, R. Gornea, M. Coon, Y-R Yen, Shu Li, S. Schmidt, Guofu Cao, A. Robinson, F. Retiere, V. A. Belov, O. Nusair, R. Krücken, Jens Dilling, B. Veenstra, K. Murray, I. Badhrees, T. I. Totev, P. Gautam, T. Daniels, J. Davis, Gisela Anton, Z. Li, U. Wichoski, T. Ziegler, B. G. Lenardo, Peter Fierlinger, Gerrit Wrede, M. Tarka, B. T. Cleveland, A. Kuchenkov, Y. Lan, S. Feyzbakhsh, Yuehe Lin, and K. S. Kumar

Subjects
Physics, Scintillation, Range (particle radiation), Physics - Instrumentation and Detectors, Photon, Argon, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, chemistry.chemical_element, FOS: Physical sciences, Electron, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Xenon, chemistry, Electric field, Ionization, 0103 physical sciences, 010306 general physics
Abstract

Liquid xenon (LXe) is employed in a number of current and future detectors for rare event searches. We use the EXO-200 experimental data to measure the absolute scintillation and ionization yields generated by $\gamma$ interactions from $^{228}$Th (2615~keV), $^{226}$Ra (1764~keV) and $^{60}$Co (1332~keV and 1173~keV) calibration sources, over a range of electric fields. The $W$-value that defines the recombination-independent energy scale is measured to be $11.5~\pm~0.5$~(syst.)~$\pm~0.1$~(stat.) eV. These data are also used to measure the recombination fluctuations in the number of electrons and photons produced by the calibration sources at the MeV-scale, which deviate from extrapolations of lower-energy data. Additionally, a semi-empirical model for the energy resolution of the detector is developed, which is used to constrain the recombination efficiency, i.e., the fraction of recombined electrons that result in the emission of a detectable photon. Detailed measurements of the absolute charge and light yields for MeV-scale electron recoils are important for predicting the performance of future neutrinoless double beta decay detectors.

Published
2019
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113. Reflectivity and PDE of VUV4 Hamamatsu SiPMs in liquid xenon

Author

Nakarmi, P., primary, Ostrovskiy, I., additional, Soma, A.K., additional, Retière, F., additional, Kharusi, S. Al, additional, Alfaris, M., additional, Anton, G., additional, Arnquist, I.J., additional, Badhrees, I., additional, Barbeau, P.S., additional, Beck, D., additional, Belov, V., additional, Bhatta, T., additional, Blatchford, J., additional, Breur, P.A., additional, Brodsky, J.P., additional, Brown, E., additional, Brunner, T., additional, Mamahit, S. Byrne, additional, Caden, E., additional, Cao, G.F., additional, Cao, L., additional, Chambers, C., additional, Chana, B., additional, Charlebois, S.A., additional, Chiu, M., additional, Cleveland, B., additional, Coon, M., additional, Craycraft, A., additional, Dalmasson, J., additional, Daniels, T., additional, Darroch, L., additional, Croix, A. De St., additional, Mesrobian-Kabakian, A. Der, additional, DeVoe, R., additional, Vacri, M.L. Di, additional, Dilling, J., additional, Ding, Y.Y., additional, Dolinski, M.J., additional, Doria, L., additional, Dragone, A., additional, Echevers, J., additional, Edaltafar, F., additional, Elbeltagi, M., additional, Fabris, L., additional, Fairbank, D., additional, Fairbank, W., additional, Farine, J., additional, Ferrara, S., additional, Feyzbakhsh, S., additional, Fontaine, R., additional, Fucarino, A., additional, Gallina, G., additional, Gautam, P., additional, Giacomini, G., additional, Goeldi, D., additional, Gornea, R., additional, Gratta, G., additional, Hansen, E.V., additional, Heffner, M., additional, Hoppe, E.W., additional, Hößl, J., additional, House, A., additional, Hughes, M., additional, Iverson, A., additional, Jamil, A., additional, Jewell, M.J., additional, Jiang, X.S., additional, Karelin, A., additional, Kaufman, L.J., additional, Koffas, T., additional, Krücken, R., additional, Kuchenkov, A., additional, Kumar, K.S., additional, Lan, Y., additional, Larson, A., additional, Leach, K.G., additional, Lenardo, B.G., additional, Leonard, D.S., additional, Li, G., additional, Li, S., additional, Li, Z., additional, Licciardi, C., additional, Lv, P., additional, MacLellan, R., additional, Massacret, N., additional, McElroy, T., additional, Medina-Peregrina, M., additional, Michel, T., additional, Mong, B., additional, Moore, D.C., additional, Murray, K., additional, Natzke, C.R., additional, Newby, R.J., additional, Ning, Z., additional, Njoya, O., additional, Nolet, F., additional, Nusair, O., additional, Odgers, K., additional, Odian, A., additional, Oriunno, M., additional, Orrell, J.L., additional, Ortega, G.S., additional, Overman, C.T., additional, Parent, S., additional, Piepke, A., additional, Pocar, A., additional, Pratte, J.-F., additional, Radeka, V., additional, Raguzin, E., additional, Rescia, S., additional, Richman, M., additional, Robinson, A., additional, Rossignol, T., additional, Rowson, P.C., additional, Roy, N., additional, Runge, J., additional, Saldanha, R., additional, Sangiorgio, S., additional, VIII, K. Skarpaas, additional, St-Hilaire, G., additional, Stekhanov, V., additional, Stiegler, T., additional, Sun, X.L., additional, Tarka, M., additional, Todd, J., additional, Totev, T.I., additional, Tsang, R., additional, Tsang, T., additional, Vachon, F., additional, Veeraraghavan, V., additional, Viel, S., additional, Visser, G., additional, Vivo-Vilches, C., additional, Vuilleumier, J.-L., additional, Wagenpfeil, M., additional, Wager, T., additional, Walent, M., additional, Wang, Q., additional, Ward, M., additional, Watkins, J., additional, Weber, M., additional, Wei, W., additional, Wen, L.J., additional, Wichoski, U., additional, Wu, S.X., additional, Wu, W.H., additional, Wu, X., additional, Xia, Q., additional, Yang, H., additional, Yang, L., additional, Zeldovich, O., additional, Zhao, J., additional, Zhou, Y., additional, and Ziegler, T., additional

Published
2020
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114. Deep Neural Networks for Energy and Position Reconstruction in EXO-200

Author

P. C. Rowson, Y.-R. Yen, A. Pocar, Douglas H Beck, J. C. Davis, W. Cree, T. Richards, Venkatesh Veeraraghavan, S. Delaquis, P. Hufschmidt, R. Krücken, M. Hughes, A. P. Waite, A. Karelin, Thomas Koffas, David Moore, W. M. Fairbank, Arun Kumar Soma, P. S. Barbeau, D. Fudenberg, A. Piepke, A. Craycraft, David A. Sinclair, M. J. Dolinski, Yuehe Lin, R. Bayerlein, Martin Breidenbach, G. S. Li, S. J. Daugherty, J. Dalmasson, V.N. Stekhanov, G. Wrede, K. S. Kumar, Stefan Schmidt, M. Tarka, A. Der Mesrobian-Kabakian, D. A. Harris, B. Mong, T. Daniels, C. R. Hall, Y. Lan, R. DeVoe, C. Chambers, J. Farine, Giorgio Gratta, Mikhail Danilov, U. Wichoski, A. S. Johnson, J. Todd, B. T. Cleveland, W. R. Cen, A. Kuchenkov, T. Ziegler, T. Tolba, A. Robinson, M. Wagenpfeil, R. MacLellan, M. Coon, J. L. Vuilleumier, E. V. Hansen, M. J. Jewell, J. Watkins, Liang Yang, D. S. Leonard, A. Jamil, S. Feyzbakhsh, Thilo Michel, Qing Xia, P. Fierlinger, C. Licciardi, Liangjian Wen, Guofu Cao, K. Murray, Gisela Anton, T. Brunner, L. J. Kaufman, O. Ya. Zeldovich, A. Dolgolenko, J. Hoessl, A. Schubert, Marc Weber, J. Daughhetee, F. Retière, J. B. Albert, V. A. Belov, R. Gornea, I. Ostrovskiy, O. Njoya, A. Iverson, Shu Li, Jens Dilling, I. Badhrees, A. Odian, and S. Kravitz

Subjects
Physics - Instrumentation and Detectors, Artificial neural network, 010308 nuclear & particles physics, Computer science, Calibration (statistics), Monte Carlo method, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Position (vector), 0103 physical sciences, Pattern recognition (psychology), Waveform, Nuclear Experiment (nucl-ex), 010306 general physics, Instrumentation, Algorithm, Nuclear Experiment, Mathematical Physics, Energy (signal processing), Event reconstruction
Abstract

We apply deep neural networks (DNN) to data from the EXO-200 experiment. In the studied cases, the DNN is able to reconstruct the relevant parameters - total energy and position - directly from raw digitized waveforms, with minimal exceptions. For the first time, the developed algorithms are evaluated on real detector calibration data. The accuracy of reconstruction either reaches or exceeds what was achieved by the conventional approaches developed by EXO-200 over the course of the experiment. Most existing DNN approaches to event reconstruction and classification in particle physics are trained on Monte Carlo simulated events. Such algorithms are inherently limited by the accuracy of the simulation. We describe a unique approach that, in an experiment such as EXO-200, allows to successfully perform certain reconstruction and analysis tasks by training the network on waveforms from experimental data, either reducing or eliminating the reliance on the Monte Carlo., Accepted version. 33 pages, 28 figures

Published
2018

115. Search for nucleon decays with EXO-200

Author

M. Hughes, E. V. Hansen, A. P. Waite, Simon Johnston, T. Tolba, A.C. Odian, Liang Yang, A. Jamil, C. R. Hall, David Moore, O. Ya. Zeldovich, G. S. Li, T. Didberidze, B. T. Cleveland, L. J. Kaufman, Martin Breidenbach, R. MacLellan, M. Coon, S. J. Daugherty, R. DeVoe, R. H. Nelson, A. Pocar, U. Wichoski, Arun Kumar Soma, C. Chambers, P. C. Rowson, Petr Vogel, P. S. Barbeau, Guofu Cao, M. Danilov, M. J. Jewell, T. Ziegler, W. Cree, Yuehe Lin, David Leonard, V. A. Belov, Thomas Koffas, W. M. Fairbank, S. Delaquis, F. Retiere, K. S. Kumar, J. Zettlemoyer, S. Feyzbakhsh, V.N. Stekhanov, Douglas H Beck, J. C. Davis, Y-R Yen, A. Craycraft, B. Mong, D. Fudenberg, Samuel Homiller, J. Daughhetee, A. Piepke, K. Graham, M. J. Dolinski, C. Licciardi, A. Der Mesrobian-Kabakian, Peter Fierlinger, R. Bayerlein, Gerrit Wrede, A. Johnson, Thilo Michel, A. Karelin, Giorgio Gratta, M. Tarka, J. Farine, A. Dolgolenko, K. Murray, Y. Lan, J. Hoessl, P. Hufschmidt, M. Wagenpfeil, David A. Sinclair, Gisela Anton, A. Robinson, T. Walton, T. Brunner, Alexis G. Schubert, A. Kuchenkov, Justin Albert, R. Tsang, W. R. Cen, R. Gornea, L. J. Wen, Marc Weber, R. Krücken, Jens Dilling, I. Badhrees, T. Daniels, J.-L. Vuilleumier, S. Kravitz, I. Ostrovskiy, O. Njoya, Shu Li, and S. Schmidt

Subjects
Particle physics, Physics - Instrumentation and Detectors, Hadron, FOS: Physical sciences, Elementary particle, nucl-ex, 01 natural sciences, Atomic, High Energy Physics - Experiment, Nuclear physics, Particle decay, High Energy Physics - Experiment (hep-ex), Particle and Plasma Physics, 0103 physical sciences, Isotopes of xenon, Nuclear, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, physics.ins-det, Physics, Quantum Physics, Isotope, 010308 nuclear & particles physics, hep-ex, Molecular, Fermion, Instrumentation and Detectors (physics.ins-det), Nuclear & Particles Physics, ddc, Baryon, Nucleon, Astronomical and Space Sciences
Abstract

A search for instability of nucleons bound in Xe136 nuclei is reported with 223 kg·yr exposure of Xe136 in the EXO-200 experiment. Lifetime limits of 3.3×1023 and 1.9×1023 yr are established for nucleon decay to Sb133 and Te133, respectively. These are the most stringent to date, exceeding the prior decay limits by a factor of 9 and 7, respectively.

Published
2018
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116. Characterization of the Hamamatsu VUV4 MPPCs for nEXO

Author

Gallina, G., primary, Giampa, P., additional, Retière, F., additional, Kroeger, J., additional, Zhang, G., additional, Ward, M., additional, Margetak, P., additional, Li, G., additional, Tsang, T., additional, Doria, L., additional, Al Kharusi, S., additional, Alfaris, M., additional, Anton, G., additional, Arnquist, I.J., additional, Badhrees, I., additional, Barbeau, P.S., additional, Beck, D., additional, Belov, V., additional, Bhatta, T., additional, Blatchford, J., additional, Brodsky, J.P., additional, Brown, E., additional, Brunner, T., additional, Cao, G.F., additional, Cao, L., additional, Cen, W.R., additional, Chambers, C., additional, Charlebois, S.A., additional, Chiu, M., additional, Cleveland, B., additional, Coon, M., additional, Craycraft, A., additional, Dalmasson, J., additional, Daniels, T., additional, Darroch, L., additional, Daugherty, S.J., additional, De St. Croix, A., additional, Der Mesrobian-Kabakian, A., additional, DeVoe, R., additional, Dilling, J., additional, Ding, Y.Y., additional, Dolinski, M.J., additional, Dragone, A., additional, Echevers, J., additional, Elbeltagi, M., additional, Fabris, L., additional, Fairbank, D., additional, Fairbank, W., additional, Farine, J., additional, Feyzbakhsh, S., additional, Fontaine, R., additional, Gautam, P., additional, Giacomini, G., additional, Gornea, R., additional, Gratta, G., additional, Hansen, E.V., additional, Heffner, M., additional, Hoppe, E.W., additional, Hößl, J., additional, House, A., additional, Hughes, M., additional, Ito, Y., additional, Iverson, A., additional, Jamil, A., additional, Jewell, M.J., additional, Jiang, X.S., additional, Karelin, A., additional, Kaufman, L.J., additional, Kodroff, D., additional, Koffas, T., additional, Krücken, R., additional, Kuchenkov, A., additional, Kumar, K.S., additional, Lan, Y., additional, Larson, A., additional, Lenardo, B.G., additional, Leonard, D.S., additional, Li, S., additional, Li, Z., additional, Licciardi, C., additional, Lin, Y.H., additional, Lv, P., additional, MacLellan, R., additional, McElroy, T., additional, Medina-Peregrina, M., additional, Michel, T., additional, Mong, B., additional, Moore, D.C., additional, Murray, K., additional, Nakarmi, P., additional, Newby, R.J., additional, Ning, Z., additional, Njoya, O., additional, Nolet, F., additional, Nusair, O., additional, Odgers, K., additional, Odian, A., additional, Oriunno, M., additional, Orrell, J.L., additional, Ortega, G.S., additional, Ostrovskiy, I., additional, Overman, C.T., additional, Parent, S., additional, Piepke, A., additional, Pocar, A., additional, Pratte, J.-F., additional, Qiu, D., additional, Radeka, V., additional, Raguzin, E., additional, Rescia, S., additional, Richman, M., additional, Robinson, A., additional, Rossignol, T., additional, Rowson, P.C., additional, Roy, N., additional, Saldanha, R., additional, Sangiorgio, S., additional, Skarpaas, K., additional, Soma, A.K., additional, St-Hilaire, G., additional, Stekhanov, V., additional, Stiegler, T., additional, Sun, X.L., additional, Tarka, M., additional, Todd, J., additional, Tolba, T., additional, Totev, T.I., additional, Tsang, R., additional, Vachon, F., additional, Veeraraghavan, V., additional, Visser, G., additional, Vuilleumier, J.-L., additional, Wagenpfeil, M., additional, Walent, M., additional, Wang, Q., additional, Watkins, J., additional, Weber, M., additional, Wei, W., additional, Wen, L.J., additional, Wichoski, U., additional, Wu, S.X., additional, Wu, W.H., additional, Wu, X., additional, Xia, Q., additional, Yang, H., additional, Yang, L., additional, Yen, Y.-R., additional, Zeldovich, O., additional, Zhao, J., additional, Zhou, Y., additional, and Ziegler, T., additional

Published
2019
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117. Simulation of charge readout with segmented tiles in nEXO

Author

Li, Z., primary, Cen, W.R., additional, Robinson, A., additional, Moore, D.C., additional, Wen, L.J., additional, Odian, A., additional, Kharusi, S. Al, additional, Anton, G., additional, Arnquist, I.J., additional, Badhrees, I., additional, Barbeau, P.S., additional, Beck, D., additional, Belov, V., additional, Bhatta, T., additional, Brodsky, J.P., additional, Brown, E., additional, Brunner, T., additional, Caden, E., additional, Cao, G.F., additional, Cao, L., additional, Chambers, C., additional, Chana, B., additional, Charlebois, S.A., additional, Chiu, M., additional, Cleveland, B., additional, Coon, M., additional, Craycraft, A., additional, Dalmasson, J., additional, Daniels, T., additional, Darroch, L., additional, Daugherty, S.J., additional, Croix, A. De St., additional, Mesrobian-Kabakian, A. Der, additional, DeVoe, R., additional, Vacri, M.L. Di, additional, Dilling, J., additional, Ding, Y.Y., additional, Dolinski, M.J., additional, Dragone, A., additional, Echevers, J., additional, Elbeltagi, M., additional, Fabris, L., additional, Fairbank, D., additional, Fairbank, W., additional, Farine, J., additional, Ferrara, S., additional, Feyzbakhsh, S., additional, Fontaine, R., additional, Fucarino, A., additional, Gallina, G., additional, Gautam, P., additional, Giacomini, G., additional, Goeldi, D., additional, Gornea, R., additional, Gratta, G., additional, Hansen, E.V., additional, Heffner, M., additional, Hoppe, E.W., additional, Hößl, J., additional, House, A., additional, Hughes, M., additional, Iverson, A., additional, Jamil, A., additional, Jewell, M.J., additional, Jiang, X.S., additional, Karelin, A., additional, Kaufman, L.J., additional, Kodroff, D., additional, Koffas, T., additional, Krücken, R., additional, Kuchenkov, A., additional, Kumar, K.S., additional, Lan, Y., additional, Larson, A., additional, Leach, K.G., additional, Lenardo, B.G., additional, Leonard, D.S., additional, Li, G., additional, Li, S., additional, Licciardi, C., additional, Lin, Y.H., additional, Lv, P., additional, MacLellan, R., additional, McElroy, T., additional, Medina-Peregrina, M., additional, Michel, T., additional, Mong, B., additional, Murray, K., additional, Nakarmi, P., additional, Natzke, C.R., additional, Newby, R.J., additional, Ning, Z., additional, Njoya, O., additional, Nolet, F., additional, Nusair, O., additional, Odgers, K., additional, Oriunno, M., additional, Orrell, J.L., additional, Ortega, G.S., additional, Ostrovskiy, I., additional, Overman, C.T., additional, Parent, S., additional, Piepke, A., additional, Pocar, A., additional, Pratte, J.-F., additional, Radeka, V., additional, Raguzin, E., additional, Rescia, S., additional, Retière, F., additional, Richman, M., additional, Rossignol, T., additional, Rowson, P.C., additional, Roy, N., additional, Runge, J., additional, Saldanha, R., additional, Sangiorgio, S., additional, VIII, K. Skarpaas, additional, Soma, A.K., additional, St-Hilaire, G., additional, Stekhanov, V., additional, Stiegler, T., additional, Sun, X.L., additional, Tarka, M., additional, Todd, J., additional, Tolba, T., additional, Totev, T.I., additional, Tsang, R., additional, Tsang, T., additional, Vachon, F., additional, Veeraraghavan, V., additional, Viel, S., additional, Visser, G., additional, Vivo-Vilches, C., additional, Vuilleumier, J.-L., additional, Wagenpfeil, M., additional, Walent, M., additional, Wang, Q., additional, Ward, M., additional, Watkins, J., additional, Weber, M., additional, Wei, W., additional, Wichoski, U., additional, Wu, S.X., additional, Wu, W.H., additional, Wu, X., additional, Xia, Q., additional, Yang, H., additional, Yang, L., additional, Yen, Y.-R., additional, Zeldovich, O., additional, Zhao, J., additional, Zhou, Y., additional, and Ziegler, T., additional

Published
2019
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119. Results from the beam test of the engineering model of the GLAST large area telescope

Author

Couto e Silva, E.do, Anthony, P, Arnold, R, Arrighi, H, Bloom, E, Baughman, B, Bogart, J, Bosted, P, Bumala, B, Chekhtman, A, Cotton, N, Crider, A, Dobbs-Dixon, I, Djannati-Atai, A, Dubois, R, Engovatov, D, Espigat, P, Evans, J.L, Fieguth, T, Flath, D, Frigaard, M, Giebels, B, Gillespie, S, Godfrey, G, Grove, J.E, Handa, T, Hansl-Kozanecka, T, Hernando, J, Hicks, M, Hirayama, M, Johnson, W.N, Johnson, R, Kamae, T, Kroeger, W, Lauben, D, Lin, Y.C, Lindner, T, Michelson, P, Moiseev, A, Nikolaou, M, Nolan, P, Odian, A, Ohsugi, T, Ormes, J, Paliaga, G, Parkinson, P.Saz, Phlips, B, Ritz, S, Rock, S, Russel, J.J, Sadrozinski, H, Schalk, T, Silvis, J, Szalata, Z, Terrier, R, Thompson, D.J, Tournear, D.M, Waite, A.P, Wallace, J, Williams, S, Williamson, R, and Winker, G

Published
2001
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120. VUV-sensitive Silicon Photomultipliers for Xenon Scintillation Light Detection in nEXO

Author

A. Jamil, T. Ziegler, P. Hufschmidt, G. Li, L. Lupin-Jimenez, T. Michel, I. Ostrovskiy, F. Retiere, J. Schneider, M. Wagenpfeil, A. Alamre, J. B. Albert, G. Anton, I. J. Arnquist, I. Badhrees, P. S. Barbeau, D. Beck, V. Belov, T. Bhatta, F. Bourque, J. P. Brodsky, E. Brown, T. Brunner, A. Burenkov, G. F. Cao, L. Cao, W. R. Cen, C. Chambers, S. A. Charlebois, M. Chiu, B. Cleveland, M. Coon, M. Cote, A. Craycraft, W. Cree, J. Dalmasson, T. Daniels, L. Darroch, S. J. Daugherty, J. Daughhetee, S. Delaquis, A. Der Mesrobian-Kabakian, R. DeVoe, J. Dilling, Y. Y. Ding, M. J. Dolinski, A. Dragone, J. Echevers, L. Fabris, D. Fairbank, W. Fairbank, J. Farine, S. Feyzbakhsh, R. Fontaine, D. Fudenberg, G. Gallina, G. Giacomini, R. Gornea, G. Gratta, E. V. Hansen, D. Harris, M. Hasan, M. Heffner, J. HoBl, E. W. Hoppe, A. House, M. Hughes, Y. Ito, A. Iverson, C. Jessiman, M. J. Jewell, X. S. Jiang, A. Karelin, L. J. Kaufman, T. Koffas, S. Kravitz, R. Krucken, A. Kuchenkov, K. S. Kumar, Y. Lan, A. Larson, D. S. Leonard, S. Li, Z. Li, C. Licciardi, Y. H. Lin, P. Lv, R. MacLellan, B. Mong, D. C. Moore, K. Murray, R. J. Newby, Z. Ning, O. Njoya, F. Nolet, O. Nusair, K. Odgers, A. Odian, M. Oriunno, J. L. Orrell, G. S. Ortega, C. T. Overman, S. Parent, A. Piepke, A. Pocar, J.-F. Pratte, D. Qiu, V. Radeka, E. Raguzin, T. Rao, S. Rescia, A. Robinson, T. Rossignol, P. C. Rowson, N. Roy, R. Saldanha, S. Sangiorgio, S. Schmidt, A. Schubert, D. Sinclair, K. Skarpaas, A. K. Soma, G. St-Hilaire, V. Stekhanov, T. Stiegler, X. L. Sun, M. Tarka, J. Todd, T. Tolba, T. I. Totev, R. Tsang, T. Tsang, F. Vachon, B. Veenstra, V. Veeraraghavan, G. Visser, J.-L. Vuilleumier, Q. Wang, J. Watkins, M. Weber, W. Wei, L. J. Wen, U. Wichoski, G. Wrede, S. X. Wu, W. H. Wu, Q. Xia, L. Yang, Y.-R. Yen, O. Zeldovich, X. Zhang, J. Zhao, and Y. Zhou

Subjects
Physics, Nuclear and High Energy Physics, Photomultiplier, Scintillation, Time projection chamber, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Noble gas, chemistry.chemical_element, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Avalanche photodiode, 01 natural sciences, Optics, Silicon photomultiplier, Xenon, Nuclear Energy and Engineering, chemistry, Double beta decay, 0103 physical sciences, Electrical and Electronic Engineering, 010306 general physics, business
Abstract

Future tonne-scale liquefied noble gas detectors depend on efficient light detection in the VUV range. In the past years Silicon Photomultipliers (SiPMs) have emerged as a valid alternative to standard photomultiplier tubes or large area avalanche photodiodes. The next generation double beta decay experiment, nEXO, with a 5 tonne liquid xenon time projection chamber, will use SiPMs for detecting the $178\,\text{nm}$ xenon scintillation light, in order to achieve an energy resolution of $\sigma / Q_{\beta\beta} = 1\, \%$. This paper presents recent measurements of the VUV-HD generation SiPMs from Fondazione Bruno Kessler in two complementary setups. It includes measurements of the photon detection efficiency with gaseous xenon scintillation light in a vacuum setup and dark measurements in a dry nitrogen gas setup. We report improved photon detection efficiency at $175\,\text{nm}$ compared to previous generation devices, that would meet the criteria of nEXO. Furthermore, we present the projected nEXO detector light collection and energy resolution that could be achieved by using these SiPMs., Comment: 11 pages, 13 figures, 2 tables

Published
2018
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121. Sensitivity and discovery potential of the proposed nEXO experiment to neutrinoless double beta decay

Author

J. L. Vuilleumier, B. Mong, M. Wagenpfeil, J. Dalmasson, A. Piepke, J. Todd, Y. Y. Ding, M. Heffner, Yuehe Lin, John L. Orrell, E. Raguzin, X.L. Sun, J. B. Zhao, C. T. Overman, R. Krücken, D. Qiu, Z. Li, Giorgio Gratta, A. Burenkov, M. Hasan, Arun Kumar Soma, L. J. Kaufman, R. DeVoe, S. J. Daugherty, Samuele Sangiorgio, M. Hughes, K. S. Kumar, V. Veeraraghavan, Y. Lan, Wei Wei, Petr Vogel, Rejean Fontaine, J. Daughhetee, A. Craycraft, U. Wichoski, Ethan Brown, F. Bourque, M. J. Jewell, M. Coon, D. Harris, Yu-Guang Zhou, T. Ziegler, T. Tolba, G. St-Hilaire, T. Tsang, Qun-Yao Wang, T. Stiegler, M. Chiu, J. P. Brodsky, David Moore, F. Retiere, Y. Ito, J. Zettlemoyer, Douglas H Beck, M. Oriunno, Zhijun Ning, S. Johnston, O. Zeldovich, G. Visser, A. Karelin, J. Hößl, A. Pocar, R. Tsang, T. Didberidze, S. Kravitz, Guofu Cao, T. N. Johnson, J. Schneider, P. Hufschmidt, E. V. Hansen, Y-R Yen, David A. Sinclair, F. Vachon, Ryan Killick, David Leonard, K. Murray, Liang Yang, R. J. Newby, Thomas Koffas, A. Jamil, D. Fudenberg, W. M. Fairbank, Gisela Anton, M. Côté, P. C. Rowson, T. Daniels, K. Graham, G. S. Ortega, B. T. Cleveland, M. J. Dolinski, V.N. Stekhanov, K. Odgers, Angelo Dragone, A. House, S. Rescia, A. Kuchenkov, W. Cree, Jean-Francois Pratte, Veljko Radeka, T. Rossignol, S. Feyzbakhsh, R. Saldanha, S. Delaquis, T. Brunner, W. R. Cen, Serge A. Charlebois, C. Licciardi, G. S. Li, R. Gornea, K. Skarpaas, G. Wrede, I. J. Arnquist, M. Tarka, Wei Wu, X. S. Jiang, A. Der Mesrobian-Kabakian, C. Chambers, A.C. Odian, G. Giacomini, A. Schubert, S. Parent, J. Farine, V. Belov, A. Robinson, L. Cao, F. Nolet, L. J. Wen, Marc Weber, S. X. Wu, Lorenzo Fabris, J. B. Albert, R. MacLellan, Thilo Michel, P. S. Barbeau, Jens Dilling, Xuan Zhang, I. Badhrees, I. Ostrovskiy, O. Njoya, A. Iverson, Shu Li, S. Schmidt, T. Rao, N. Roy, and E. W. Hoppe

Subjects
Physics, Time projection chamber, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Active medium, Detector, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, 7. Clean energy, 3. Good health, Nuclear physics, Homogeneous, 0103 physical sciences, Sensitivity (control systems), Nuclear Experiment (nucl-ex), 010306 general physics, Enriched Xenon Observatory, Nuclear Experiment, Order of magnitude
Abstract

The next-generation Enriched Xenon Observatory (nEXO) is a proposed experiment to search for neutrinoless double beta ($0\nu\beta\beta$) decay in $^{136}$Xe with a target half-life sensitivity of approximately $10^{28}$ years using $5\times10^3$ kg of isotopically enriched liquid-xenon in a time projection chamber. This improvement of two orders of magnitude in sensitivity over current limits is obtained by a significant increase of the $^{136}$Xe mass, the monolithic and homogeneous configuration of the active medium, and the multi-parameter measurements of the interactions enabled by the time projection chamber. The detector concept and anticipated performance are presented based upon demonstrated realizable background rates., Comment: v2 as published

Published
2017

122. Searches for Double Beta Decay of $^{134}$Xe with EXO-200

Author

200 Collaboration, Albert, J. B., Anton, G., Badhrees, I., Barbeau, P. S., Bayerlein, R., Beck, D., Belov, V., Breidenbach, M., Brunner, T., Cao, G. F., Cen, W. R., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Cree, W., Daniels, T., Danilov, M., Daugherty, S. J., Daughhetee, J., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Didberidze, T., Dilling, J., Dolgolenko, A., Dolinski, M. J., Fairbank, W., Farine, J., Feyzbakhsh, S., Fierlinger, P., Fudenberg, D., Gornea, R., Graham, K., Gratta, G., Hall, C., Hoessl, J., Hufschmidt, P., Hughes, M., Jamil, A., Jewell, M. J., Johnson, A., Johnston, S., Karelin, A., Kaufman, L. J., Koffas, T., Kravitz, S., Kr��cken, R., Kuchenkov, A., Kumar, K. S., Lan, Y., Leonard, D. S., Li, S., Licciardi, C., Lin, Y. H., MacLellan, R., Marino, M. G., Michel, T., Mong, B., Moore, D., Murray, K., Nelson, R., Njoya, O., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Reti��re, F., Rowson, P. C., Russell, J. J., Schubert, A., Sinclair, D., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tsang, R., Vogel, P., Vuilleumier, J. -L., Wagenpfeil, M., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Yang, L., Yen, Y. -R., Zeldovich, O. Ya., Zettlemoyer, J., and Ziegler, T.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment, High Energy Physics - Experiment
Abstract

Searches for double beta decay of $^{134}$Xe were performed with EXO-200, a single-phase liquid xenon detector designed to search for neutrinoless double beta decay of $^{136}$Xe. Using an exposure of $29.6\text{ kg}\!\cdot\!\text{yr}$, the lower limits of $\text{T}_{1/2}^{2\nu\beta\!\beta}>8.7\cdot10^{20}\text{ yr}$ and $\text{T}_{1/2}^{0\nu\beta\!\beta}>1.1\cdot10^{23}\text{ yr}$ at 90% confidence level were derived, with corresponding half-life sensitivities of $1.2\cdot10^{21}\text{ yr}$ and $1.9\cdot10^{23}\text{ yr}$. These limits exceed those in the literature for $^{134}$Xe, improving by factors of nearly $10^{5}$ and 2 for the two antineutrino and neutrinoless modes, respectively., Comment: 8 pages, 4 figures

Published
2017

123. VUV-Sensitive Silicon Photomultipliers for Xenon Scintillation Light Detection in nEXO

Author

Jamil, A., primary, Ziegler, T., additional, Hufschmidt, P., additional, Li, G., additional, Lupin-Jimenez, L., additional, Michel, T., additional, Ostrovskiy, I., additional, Retiere, F., additional, Schneider, J., additional, Wagenpfeil, M., additional, Alamre, A., additional, Albert, J. B., additional, Anton, G., additional, Arnquist, I. J., additional, Badhrees, I., additional, Barbeau, P. S., additional, Beck, D., additional, Belov, V., additional, Bhatta, T., additional, Bourque, F., additional, Brodsky, J. P., additional, Brown, E., additional, Brunner, T., additional, Burenkov, A., additional, Cao, G. F., additional, Cao, L., additional, Cen, W. R., additional, Chambers, C., additional, Charlebois, S. A., additional, Chiu, M., additional, Cleveland, B., additional, Coon, M., additional, Cote, M., additional, Craycraft, A., additional, Cree, W., additional, Dalmasson, J., additional, Daniels, T., additional, Darroch, L., additional, Daugherty, S. J., additional, Daughhetee, J., additional, Delaquis, S., additional, Mesrobian-Kabakian, A. Der, additional, DeVoe, R., additional, Dilling, J., additional, Ding, Y. Y., additional, Dolinski, M. J., additional, Dragone, A., additional, Echevers, J., additional, Fabris, L., additional, Fairbank, D., additional, Fairbank, W., additional, Farine, J., additional, Feyzbakhsh, S., additional, Fontaine, R., additional, Fudenberg, D., additional, Gallina, G., additional, Giacomini, G., additional, Gornea, R., additional, Gratta, G., additional, Hansen, E. V., additional, Harris, D., additional, Hasan, M., additional, Heffner, M., additional, HoBl, J., additional, Hoppe, E. W., additional, House, A., additional, Hughes, M., additional, Ito, Y., additional, Iverson, A., additional, Jessiman, C., additional, Jewell, M. J., additional, Jiang, X. S., additional, Karelin, A., additional, Kaufman, L. J., additional, Koffas, T., additional, Kravitz, S., additional, Krucken, R., additional, Kuchenkov, A., additional, Kumar, K. S., additional, Lan, Y., additional, Larson, A., additional, Leonard, D. S., additional, Li, S., additional, Li, Z., additional, Licciardi, C., additional, Lin, Y. H., additional, Lv, P., additional, MacLellan, R., additional, Mong, B., additional, Moore, D. C., additional, Murray, K., additional, Newby, R. J., additional, Ning, Z., additional, Njoya, O., additional, Nolet, F., additional, Nusair, O., additional, Odgers, K., additional, Odian, A., additional, Oriunno, M., additional, Orrell, J. L., additional, Ortega, G. S., additional, Overman, C. T., additional, Parent, S., additional, Piepke, A., additional, Pocar, A., additional, Pratte, J.-F., additional, Qiu, D., additional, Radeka, V., additional, Raguzin, E., additional, Rao, T., additional, Rescia, S., additional, Robinson, A., additional, Rossignol, T., additional, Rowson, P. C., additional, Roy, N., additional, Saldanha, R., additional, Sangiorgio, S., additional, Schmidt, S., additional, Schubert, A., additional, Sinclair, D., additional, Skarpaas, K., additional, Soma, A. K., additional, St-Hilaire, G., additional, Stekhanov, V., additional, Stiegler, T., additional, Sun, X. L., additional, Tarka, M., additional, Todd, J., additional, Tolba, T., additional, Totev, T. I., additional, Tsang, R., additional, Tsang, T., additional, Vachon, F., additional, Veenstra, B., additional, Veeraraghavan, V., additional, Visser, G., additional, Vuilleumier, J.-L., additional, Wang, Q., additional, Watkins, J., additional, Weber, M., additional, Wei, W., additional, Wen, L. J., additional, Wichoski, U., additional, Wrede, G., additional, Wu, S. X., additional, Wu, W. H., additional, Xia, Q., additional, Yang, L., additional, Yen, Y.-R., additional, Zeldovich, O., additional, Zhang, X., additional, Zhao, J., additional, and Zhou, Y., additional

Published
2018
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124. Study of silicon photomultiplier performance in external electric fields

Author

Sun, X.L., primary, Tolba, T., additional, Cao, G.F., additional, Lv, P., additional, Wen, L.J., additional, Odian, A., additional, Vachon, F., additional, Alamre, A., additional, Albert, J.B., additional, Anton, G., additional, Arnquist, I.J., additional, Badhrees, I., additional, Barbeau, P.S., additional, Beck, D., additional, Belov, V., additional, Bhatta, T., additional, Bourque, F., additional, Brodsky, J. P., additional, Brown, E., additional, Brunner, T., additional, Burenkov, A., additional, Cao, L., additional, Cen, W.R., additional, Chambers, C., additional, Charlebois, S.A., additional, Chiu, M., additional, Cleveland, B., additional, Coon, M., additional, Côté, M., additional, Craycraft, A., additional, Cree, W., additional, Dalmasson, J., additional, Daniels, T., additional, Darroch, L., additional, Daugherty, S.J., additional, Daughhetee, J., additional, Delaquis, S., additional, Mesrobian-Kabakian, A. Der, additional, DeVoe, R., additional, Dilling, J., additional, Ding, Y.Y., additional, Dolinski, M.J., additional, Dragone, A., additional, Echevers, J., additional, Fabris, L., additional, Fairbank, D., additional, Fairbank, W., additional, Farine, J., additional, Feyzbakhsh, S., additional, Fierlinger, P., additional, Fontaine, R., additional, Fudenberg, D., additional, Gallina, G., additional, Giacomini, G., additional, Gornea, R., additional, Gratta, G., additional, Hansen, E.V., additional, Harris, D., additional, Heffner, M., additional, Hoppe, E. W., additional, Hößl, J., additional, House, A., additional, Hufschmidt, P., additional, Hughes, M., additional, Ito, Y., additional, Iverson, A., additional, Jamil, A., additional, Jessiman, C., additional, Jewell, M.J., additional, Jiang, X.S., additional, Karelin, A., additional, Kaufman, L.J., additional, Kodroff, D., additional, Koffas, T., additional, Kravitz, S., additional, Krücken, R., additional, Kuchenkov, A., additional, Kumar, K.S., additional, Lan, Y., additional, Larson, A., additional, Leonard, D.S., additional, Li, G., additional, Li, S., additional, Li, Z., additional, Licciardi, C., additional, Lin, Y.H., additional, MacLellan, R., additional, Michel, T., additional, Moe, M., additional, Mong, B., additional, Moore, D.C., additional, Murray, K., additional, Newby, R.J., additional, Ning, Z., additional, Njoya, O., additional, Nolet, F., additional, Nusair, O., additional, Odgers, K., additional, Oriunno, M., additional, Orrell, J.L., additional, Ortega, G. S., additional, Ostrovskiy, I., additional, Overman, C.T., additional, Parent, S., additional, Piepke, A., additional, Pocar, A., additional, Pratte, J.-F., additional, Qiu, D., additional, Radeka, V., additional, Raguzin, E., additional, Rao, T., additional, Rescia, S., additional, Retière, F., additional, Robinson, A., additional, Rossignol, T., additional, Rowson, P.C., additional, Roy, N., additional, Saldanha, R., additional, Sangiorgio, S., additional, Schmidt, S., additional, Schneider, J., additional, Sinclair, D., additional, VIII, K. Skarpaas, additional, Soma, A.K., additional, St-Hilaire, G., additional, Stekhanov, V., additional, Stiegler, T., additional, Tarka, M., additional, Todd, J., additional, Totev, T.I., additional, Tsang, R., additional, Tsang, T., additional, Veenstra, B., additional, Veeraraghavan, V., additional, Visser, G., additional, Vuilleumier, J.-L., additional, Wagenpfeil, M., additional, Wang, Q., additional, Watkins, J., additional, Weber, M., additional, Wei, W., additional, Wichoski, U., additional, Wrede, G., additional, Wu, S.X., additional, Wu, W.H., additional, Xia, Q., additional, Yang, L., additional, Yen, Y.-R., additional, Zeldovich, O., additional, Zhao, J., additional, Zhou, Y., additional, and Ziegler, T., additional

Published
2018
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125. Deep neural networks for energy and position reconstruction in EXO-200

Author

Delaquis, S., primary, Jewell, M.J., additional, Ostrovskiy, I., additional, Weber, M., additional, Ziegler, T., additional, Dalmasson, J., additional, Kaufman, L.J., additional, Richards, T., additional, Albert, J.B., additional, Anton, G., additional, Badhrees, I., additional, Barbeau, P.S., additional, Bayerlein, R., additional, Beck, D., additional, Belov, V., additional, Breidenbach, M., additional, Brunner, T., additional, Cao, G.F., additional, Cen, W.R., additional, Chambers, C., additional, Cleveland, B., additional, Coon, M., additional, Craycraft, A., additional, Cree, W., additional, Daniels, T., additional, Danilov, M., additional, Daugherty, S.J., additional, Daughhetee, J., additional, Davis, J., additional, Mesrobian-Kabakian, A. Der, additional, DeVoe, R., additional, Dilling, J., additional, Dolgolenko, A., additional, Dolinski, M.J., additional, Jr., W. Fairbank, additional, Farine, J., additional, Feyzbakhsh, S., additional, Fierlinger, P., additional, Fudenberg, D., additional, Gornea, R., additional, Gratta, G., additional, Hall, C., additional, Hansen, E.V., additional, Harris, D., additional, Hoessl, J., additional, Hufschmidt, P., additional, Hughes, M., additional, Iverson, A., additional, Jamil, A., additional, Johnson, A., additional, Karelin, A., additional, Koffas, T., additional, Kravitz, S., additional, Krücken, R., additional, Kuchenkov, A., additional, Kumar, K.S., additional, Lan, Y., additional, Leonard, D.S., additional, Li, G.S., additional, Li, S., additional, Licciardi, C., additional, Lin, Y.H., additional, MacLellan, R., additional, Michel, T., additional, Mong, B., additional, Moore, D., additional, Murray, K., additional, Njoya, O., additional, Odian, A., additional, Piepke, A., additional, Pocar, A., additional, Retière, F., additional, Robinson, A.L., additional, Rowson, P.C., additional, Schmidt, S., additional, Schubert, A., additional, Sinclair, D., additional, Soma, A.K., additional, Stekhanov, V., additional, Tarka, M., additional, Todd, J., additional, Tolba, T., additional, Veeraraghavan, V., additional, Vuilleumier, J.-L., additional, Wagenpfeil, M., additional, Waite, A., additional, Watkins, J., additional, Wen, L.J., additional, Wichoski, U., additional, Wrede, G., additional, Xia, Q., additional, Yang, L., additional, Yen, Y.-R., additional, and Zeldovich, O.Ya., additional

Published
2018
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126. Comparison of Air Fluorescence and Ionization Measurements of E.M. Shower Depth Profiles: Test of a UHECR Detector Technique

Author

Belz, J., primary, Cao, Z., additional, Huentemeyer, P., additional, Jui, C.C.H., additional, Martens, K., additional, Matthews, J., additional, Maestas, M., additional, Smith, J., additional, Sokolsky, P., additional, Springer, R.W., additional, Thomas, J., additional, Thomas, S., additional, Chen, P., additional, Field, Clive, additional, Hast, C., additional, Iverson, R., additional, Ng, J.S.T., additional, Odian, A., additional, Reil, K., additional, Vincke, H., additional, and Walz, D., additional

Published
2005
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127. Search for nucleon decays with EXO-200

Author

Albert, J.B. (J. B.), Anton, G. (G.), Badhrees, I. (I.), Barbeau, P.S. (P. S.), Bayerlein, R. (R.), Beck, D. (D.), Belov, V. (V.), Breidenbach, M. (M.), Brunner, T. (T.), Cao, G.F. (G. F.), Cen, W.R. (W. R.), Chambers, C. (C.), Cleveland, B. (B.), Coon, M. (M.), Craycraft, A. (A.), Cree, W. (W.), Daniels, T. (T.), Danilov, M. (M.), Daugherty, S.J. (S. J.), Daughhetee, J. (J.), Davis, J. (J.), Delaquis, S. (S.), Der Mesrobian-Kabakian, A. (A.), Devoe, R. (R.), Didberidze, T. (T.), Dilling, J. (J.), Dolgolenko, A. (A.), Dolinski, M.J. (M. J.), Fairbank, W. (W.), Farine, J. (J.), Feyzbakhsh, S. (S.), Fierlinger, P. (P.), Fudenberg, D. (D.), Gornea, R.S. (Razvan Stefan), Graham, K. (K.), Gratta, G. (G.), Hall, C. (C.), Hansen, E.V. (E. V.), Hoessl, J. (J.), Homiller, S. (S.), Hufschmidt, P. (P.), Hughes, M. (M.), Jamil, A. (A.), Jewell, M.J. (M. J.), Johnson, A. (A.), Johnston, S. (S.), Karelin, A. (A.), Kaufman, L.J. (L. J.), Koffas, T. (Thomas), Kravitz, S. (S.), Krücken, R. (R.), Kuchenkov, A. (A.), Kumar, K.S. (K. S.), Lan, Y. (Y.), Leonard, D.S. (D. S.), Li, G.S. (G. S.), Li, S. (S.), Licciardi, C. (C.), Lin, Y.H. (Y. H.), Maclellan, R. (R.), Michel, T. (T.), Mong, B. (B.), Moore, D. (D.), Murray, K. (K.), Nelson, R. (R.), Njoya, O. (O.), Odian, A. (A.), Ostrovskiy, I. (I.), Piepke, A. (A.), Pocar, A. (A.), Retière, F. (F.), Robinson, A.L. (A. L.), Rowson, P.C. (P. C.), Schmidt, S. (S.), Schubert, A. (A.), Sinclair, D. (D.), Soma, A.K. (A. K.), Stekhanov, V. (V.), Tarka, M. (M.), Tolba, T. (T.), Tsang, R. (R.), Vogel, P. (P.), Vuilleumier, J.-L. (J. L.), Wagenpfeil, M. (M.), Waite, A. (A.), Walton, T. (T.), Weber, M. (M.), Wen, L.J. (L. J.), Wichoski, U. (U.), Wrede, G. (G.), Yang, L. (L.), Yen, Y.-R. (Y. R.), Zeldovich, O.Ya. (O. Ya), Zettlemoyer, J. (J.), Ziegler, T. (T.), Albert, J.B. (J. B.), Anton, G. (G.), Badhrees, I. (I.), Barbeau, P.S. (P. S.), Bayerlein, R. (R.), Beck, D. (D.), Belov, V. (V.), Breidenbach, M. (M.), Brunner, T. (T.), Cao, G.F. (G. F.), Cen, W.R. (W. R.), Chambers, C. (C.), Cleveland, B. (B.), Coon, M. (M.), Craycraft, A. (A.), Cree, W. (W.), Daniels, T. (T.), Danilov, M. (M.), Daugherty, S.J. (S. J.), Daughhetee, J. (J.), Davis, J. (J.), Delaquis, S. (S.), Der Mesrobian-Kabakian, A. (A.), Devoe, R. (R.), Didberidze, T. (T.), Dilling, J. (J.), Dolgolenko, A. (A.), Dolinski, M.J. (M. J.), Fairbank, W. (W.), Farine, J. (J.), Feyzbakhsh, S. (S.), Fierlinger, P. (P.), Fudenberg, D. (D.), Gornea, R.S. (Razvan Stefan), Graham, K. (K.), Gratta, G. (G.), Hall, C. (C.), Hansen, E.V. (E. V.), Hoessl, J. (J.), Homiller, S. (S.), Hufschmidt, P. (P.), Hughes, M. (M.), Jamil, A. (A.), Jewell, M.J. (M. J.), Johnson, A. (A.), Johnston, S. (S.), Karelin, A. (A.), Kaufman, L.J. (L. J.), Koffas, T. (Thomas), Kravitz, S. (S.), Krücken, R. (R.), Kuchenkov, A. (A.), Kumar, K.S. (K. S.), Lan, Y. (Y.), Leonard, D.S. (D. S.), Li, G.S. (G. S.), Li, S. (S.), Licciardi, C. (C.), Lin, Y.H. (Y. H.), Maclellan, R. (R.), Michel, T. (T.), Mong, B. (B.), Moore, D. (D.), Murray, K. (K.), Nelson, R. (R.), Njoya, O. (O.), Odian, A. (A.), Ostrovskiy, I. (I.), Piepke, A. (A.), Pocar, A. (A.), Retière, F. (F.), Robinson, A.L. (A. L.), Rowson, P.C. (P. C.), Schmidt, S. (S.), Schubert, A. (A.), Sinclair, D. (D.), Soma, A.K. (A. K.), Stekhanov, V. (V.), Tarka, M. (M.), Tolba, T. (T.), Tsang, R. (R.), Vogel, P. (P.), Vuilleumier, J.-L. (J. L.), Wagenpfeil, M. (M.), Waite, A. (A.), Walton, T. (T.), Weber, M. (M.), Wen, L.J. (L. J.), Wichoski, U. (U.), Wrede, G. (G.), Yang, L. (L.), Yen, Y.-R. (Y. R.), Zeldovich, O.Ya. (O. Ya), Zettlemoyer, J. (J.), and Ziegler, T. (T.)

Abstract

A search for instability of nucleons bound in Xe136 nuclei is reported with 223 kg·yr exposure of Xe136 in the EXO-200 experiment. Lifetime limits of 3.3×1023 and 1.9×1023 yr are established for nucleon decay to Sb133 and Te133, respectively. These are the most stringent to date, exceeding the prior decay limits by a factor of 9 and 7, respectively.

Published
2018
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132. Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector

Author

M. Wagenpfeil, S. Feyzbakhsh, S. Johnston, Martin Breidenbach, M. Coon, P. Fierlinger, Liangjian Wen, S. J. Daugherty, Guofu Cao, K. Graham, C. Licciardi, S. Kravitz, O. Ya. Zeldovich, R. Bayerlein, A. Piepke, R. H. Nelson, A. Schubert, U. Wichoski, Marc Weber, B. T. Cleveland, E. V. Hansen, B. Mong, P. C. Rowson, Giorgio Gratta, A. Kuchenkov, T. Ziegler, P. S. Barbeau, W. Cree, J. Davis, R. Krücken, S. Delaquis, K. Murray, David Leonard, R. Tsang, M. J. Jewell, A. Karelin, V. A. Belov, Gisela Anton, Liang Yang, A. Jamil, J. J. Russell, J. Farine, J. B. Albert, T. Walton, Thomas Koffas, W. M. Fairbank, M. Danilov, W. R. Cen, R. Gornea, J. Hoessl, Y. Lan, P. Hufschmidt, R. DeVoe, L. J. Kaufman, Douglas H Beck, J. Zettlemoyer, David A. Sinclair, Y-R Yen, J. Daughhetee, Yuehe Lin, C. Chambers, J. L. Vuilleumier, C. R. Hall, R. MacLellan, K. S. Kumar, A. Craycraft, T. Tolba, Thilo Michel, T. Brunner, A. S. Johnson, A. Dolgolenko, V.N. Stekhanov, A. Pocar, D. Fudenberg, M. Hughes, A. P. Waite, David Moore, T. Didberidze, Petr Vogel, F. Retiere, G. S. Li, M. J. Dolinski, A. Der Mesrobian-Kabakian, I. Ostrovskiy, O. Njoya, Shu Li, S. Schmidt, Jens Dilling, I. Badhrees, A. Odian, Gerrit Wrede, M. Tarka, and T. Daniels

Subjects
Cryostat, Physics, Particle physics, 010308 nuclear & particles physics, Detector, General Physics and Astronomy, chemistry.chemical_element, FOS: Physical sciences, Radon, 01 natural sciences, Confidence interval, High Energy Physics - Experiment, ddc, Nuclear physics, Lead shielding, High Energy Physics - Experiment (hep-ex), Upgrade, chemistry, Double beta decay, 0103 physical sciences, Nuclear astrophysics, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment
Abstract

Results from a search for neutrinoless double-beta decay $0\nu\beta\beta$ of $^{136}$Xe are presented using the first year of data taken with the upgraded EXO-200 detector. Relative to previous searches by EXO-200, the energy resolution of the detector has been improved to $\sigma/E$=1.23%, the electric field in the drift region has been raised by 50%, and a system to suppress radon in the volume between the cryostat and lead shielding has been implemented. In addition, analysis techniques that improve topological discrimination between $0\nu\beta\beta$ and background events have been developed. Incorporating these hardware and analysis improvements, the median 90% confidence level $0\nu\beta\beta$ half-life sensitivity after combining with the full data set acquired before the upgrade has increased 2-fold to $3.7 \times 10^{25}$ yr. No statistically significant evidence for $0\nu\beta\beta$ is observed, leading to a lower limit on the $0\nu\beta\beta$ half-life of $1.8\times10^{25}$ yr at the 90% confidence level., Comment: 6 pages, 4 figures, final version submitted to PRL

Published
2017
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133. Characterization of an Ionization Readout Tile for nEXO

Author

T. Stiegler, Douglas H Beck, R. Tsang, K. Murray, Gisela Anton, D. Fudenberg, R. Saldanha, Angelo Dragone, J. Todd, Y. Y. Ding, R. Krücken, Jochen M. Schneider, Y-R Yen, Jean-Francois Pratte, P. C. Rowson, K. Skarpaas, S. Kravitz, E. V. Hansen, Liang Yang, S. Feyzbakhsh, A. House, V. Veeraraghavan, R. J. Newby, A. Jamil, Ethan Brown, M. Chiu, W. Cree, A. Burenkov, S. Delaquis, M. Hughes, M. Côté, T. Daniels, Gabriele Giacomini, A. Pocar, Maulik R. Patel, M. Hasan, J. Farine, A. Karelin, R. DeVoe, Jens Dilling, Arun Kumar Soma, Zhijun Ning, T. Tolba, M. J. Jewell, I. Badhrees, David Moore, A. Robinson, T. Didberidze, B. Mong, M. Wagenpfeil, J. Dalmasson, I. J. Arnquist, Xiaoshan Jiang, Yuehe Lin, Veljko Radeka, A. Piepke, Gerrit Wrede, V.N. Stekhanov, J. B. Zhao, S. Parent, U. Wichoski, M. Oriunno, W. R. Cen, C. Chambers, R. Gornea, M. Heffner, A. Odian, D. Qiu, M. Tarka, S. Johnston, T. Ziegler, I. Ostrovskiy, John L. Orrell, E. Raguzin, Z. Li, T. Brunner, S. Rescia, S. X. Wu, Eric W. Hoppe, M. Coon, S. J. Daugherty, A. Schubert, O. Zeldovich, Cory T. Overman, G. Visser, Wei Wu, O. Njoya, A. Iverson, Triveni Rao, Y. Lan, Thomas Tsang, Shu Li, S. Schmidt, J. Daughhetee, Qian Wang, David Leonard, G. S. Ortega, Thomas Koffas, W. M. Fairbank, Samuele Sangiorgio, Giorgio Gratta, J. L. Vuilleumier, B. T. Cleveland, K. Odgers, Serge A. Charlebois, R. MacLellan, Yumei Zhou, Wei Wei, K. S. Kumar, Rejean Fontaine, A. Kuchenkov, P. Hufschmidt, David A. Sinclair, F. Bourque, J. P. Brodsky, G. St-Hilaire, D. Harris, Y. Ito, L. J. Kaufman, M. J. Dolinski, A. Craycraft, Liangjian Wen, Guofu Cao, G. S. Li, Thilo Michel, T. Rossignol, Xiaoyang Sun, C. Licciardi, A. Der Mesrobian-Kabakian, N. Roy, L. Cao, F. Nolet, F. Vachon, Marc Weber, F. Retière, J. B. Albert, X. Zhang, J. Hößl, P. S. Barbeau, V. A. Belov, and Lorenzo Fabris

Subjects
Physics - Instrumentation and Detectors, Materials science, Physics::Instrumentation and Detectors, chemistry.chemical_element, FOS: Physical sciences, STRIPS, 01 natural sciences, law.invention, Optics, Xenon, law, Ionization, 0103 physical sciences, Wafer, 010306 general physics, Instrumentation, Mathematical Physics, Time projection chamber, 010308 nuclear & particles physics, business.industry, Detector, Instrumentation and Detectors (physics.ins-det), Anode, chemistry, visual_art, visual_art.visual_art_medium, Tile, business
Abstract

A new design for the anode of a time projection chamber, consisting of a charge-detecting "tile", is investigated for use in large scale liquid xenon detectors. The tile is produced by depositing 60 orthogonal metal charge-collecting strips, 3~mm wide, on a 10~\si{\cm} $\times$ 10~\si{\cm} fused-silica wafer. These charge tiles may be employed by large detectors, such as the proposed tonne-scale nEXO experiment to search for neutrinoless double-beta decay. Modular by design, an array of tiles can cover a sizable area. The width of each strip is small compared to the size of the tile, so a Frisch grid is not required. A grid-less, tiled anode design is beneficial for an experiment such as nEXO, where a wire tensioning support structure and Frisch grid might contribute radioactive backgrounds and would have to be designed to accommodate cycling to cryogenic temperatures. The segmented anode also reduces some degeneracies in signal reconstruction that arise in large-area crossed-wire time projection chambers. A prototype tile was tested in a cell containing liquid xenon. Very good agreement is achieved between the measured ionization spectrum of a $^{207}$Bi source and simulations that include the microphysics of recombination in xenon and a detailed modeling of the electrostatic field of the detector. An energy resolution $\sigma/E$=5.5\% is observed at 570~\si{keV}, comparable to the best intrinsic ionization-only resolution reported in literature for liquid xenon at 936~V/\si{cm}., Comment: 18 pages, 13 figures, as published

Published
2017
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134. Characterization of an Ionization Readout Tile for nEXO

Author

Jewell, M., primary, Schubert, A., additional, Cen, W.R., additional, Dalmasson, J., additional, DeVoe, R., additional, Fabris, L., additional, Gratta, G., additional, Jamil, A., additional, Li, G., additional, Odian, A., additional, Patel, M., additional, Pocar, A., additional, Qiu, D., additional, Wang, Q., additional, Wen, L.J., additional, Albert, J.B., additional, Anton, G., additional, Arnquist, I.J., additional, Badhrees, I., additional, Barbeau, P., additional, Beck, D., additional, Belov, V., additional, Bourque, F., additional, Brodsky, J. P., additional, Brown, E., additional, Brunner, T., additional, Burenkov, A., additional, Cao, G.F., additional, Cao, L., additional, Chambers, C., additional, Charlebois, S.A., additional, Chiu, M., additional, Cleveland, B., additional, Coon, M., additional, Craycraft, A., additional, Cree, W., additional, Côté, M., additional, Daniels, T., additional, Daugherty, S.J., additional, Daughhetee, J., additional, Delaquis, S., additional, Mesrobian-Kabakian, A. Der, additional, Didberidze, T., additional, Dilling, J., additional, Ding, Y.Y., additional, Dolinski, M.J., additional, Dragone, A., additional, Fairbank, W., additional, Farine, J., additional, Feyzbakhsh, S., additional, Fontaine, R., additional, Fudenberg, D., additional, Giacomini, G., additional, Gornea, R., additional, Hansen, E.V., additional, Harris, D., additional, Hasan, M., additional, Heffner, M., additional, Hoppe, E. W., additional, House, A., additional, Hufschmidt, P., additional, Hughes, M., additional, Hößl, J., additional, Ito, Y., additional, Iverson, A., additional, Jiang, X.S., additional, Johnston, S., additional, Karelin, A., additional, Kaufman, L.J., additional, Koffas, T., additional, Kravitz, S., additional, Krücken, R., additional, Kuchenkov, A., additional, Kumar, K.S., additional, Lan, Y., additional, Leonard, D.S., additional, Li, S., additional, Li, Z., additional, Licciardi, C., additional, Lin, Y.H., additional, MacLellan, R., additional, Michel, T., additional, Mong, B., additional, Moore, D., additional, Murray, K., additional, Newby, R.J., additional, Ning, Z., additional, Njoya, O., additional, Nolet, F., additional, Odgers, K., additional, Oriunno, M., additional, Orrell, J.L., additional, Ostrovskiy, I., additional, Overman, C.T., additional, Ortega, G. S., additional, Parent, S., additional, Piepke, A., additional, Pratte, J.-F., additional, Radeka, V., additional, Raguzin, E., additional, Rao, T., additional, Rescia, S., additional, Retiere, F., additional, Robinson, A., additional, Rossignol, T., additional, Rowson, P.C., additional, Roy, N., additional, Saldanha, R., additional, Sangiorgio, S., additional, Schmidt, S., additional, Schneider, J., additional, Sinclair, D., additional, Skarpaas, K., additional, Soma, A.K., additional, St-Hilaire, G., additional, Stekhanov, V., additional, Stiegler, T., additional, Sun, X.L., additional, Tarka, M., additional, Todd, J., additional, Tolba, T., additional, Tsang, R., additional, Tsang, T., additional, Vachon, F., additional, Veeraraghavan, V., additional, Visser, G., additional, Vuilleumier, J.-L., additional, Wagenpfeil, M., additional, Weber, M., additional, Wei, W., additional, Wichoski, U., additional, Wrede, G., additional, Wu, S.X., additional, Wu, W.H., additional, Yang, L., additional, Yen, Y.-R., additional, Zeldovich, O., additional, Zhang, X., additional, Zhao, J., additional, Zhou, Y., additional, and Ziegler, T., additional

Published
2018
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135. An Optimal Energy Estimator to Reduce Correlated Noise for the EXO-200 Light Readout

Author

A. Der Mesrobian-Kabakian, Yuehe Lin, A. Pocar, S. Kravitz, Monica Dunford, C. Y. Prescott, M. Coon, R. Tsang, A. Craycraft, J. L. Wood, V.N. Stekhanov, Liang Yang, K. S. Kumar, W. R. Cen, R. Gornea, K. Graham, J. J. Russell, J. Farine, M. Danilov, Peter Fierlinger, A. Karelin, A. Dolgolenko, R. DeVoe, Douglas H Beck, David Leonard, V. Belov, M. Tarka, Thomas Koffas, W. M. Fairbank, Y-R Yen, Michael G. Marino, T. Daniels, S. Johnston, T. Brunner, C. G. Davis, O. Ya. Zeldovich, T. Walton, Liangjian Wen, A. S. Johnson, Guofu Cao, Martin Breidenbach, S. J. Daugherty, L. J. Kaufman, A. Burenkov, B. Mong, E. Smith, R. Krücken, F. Retière, J. B. Albert, David A. Sinclair, A. Schubert, Ryan Killick, R. H. Nelson, M. J. Dolinski, U. Wichoski, B. T. Cleveland, P. S. Barbeau, T. Tolba, A. Kuchenkov, S. Feyzbakhsh, Marc Weber, C. Licciardi, C. R. Hall, J. L. Vuilleumier, J. Walton, A. Piepke, Giorgio Gratta, W. Feldmeier, J. Davis, M. Hughes, A. P. Waite, M. J. Jewell, K. Twelker, David Moore, T. Didberidze, T. N. Johnson, D. Fudenberg, R. MacLellan, C. Chambers, P. C. Rowson, S. Delaquis, Jens Dilling, A. Odian, I. Ostrovskiy, and O. Njoya

Subjects
Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, 01 natural sciences, Noise (electronics), Particle detector, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Optics, Double beta decay, 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Instrumentation, Nuclear Experiment, Mathematical Physics, Physics, Scintillation, 010308 nuclear & particles physics, business.industry, Detector, Estimator, Instrumentation and Detectors (physics.ins-det), High Energy Physics::Experiment, business, Energy (signal processing), Radioactive decay
Abstract

The energy resolution of the EXO-200 detector is limited by electronics noise in the measurement of the scintillation response. Here we present a new technique to extract optimal scintillation energy measurements for signals split across multiple channels in the presence of correlated noise. The implementation of these techniques improves the energy resolution of the detector at the neutrinoless double beta decay Q-value from $\left[1.9641\pm 0.0039\right]\%$ to $\left[1.5820\pm 0.0044\right]\%$., Comment: 21 pages, 8 figures, 1 table

Published
2016
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136. Trace radioactive impurities in final construction materials for EXO-200

Author

Leonard, D.S., primary, Auty, D.J., additional, Didberidze, T., additional, Gornea, R., additional, Grinberg, P., additional, MacLellan, R., additional, Methven, B., additional, Piepke, A., additional, Vuilleumier, J.-L., additional, Albert, J.B., additional, Anton, G., additional, Badhrees, I., additional, Barbeau, P.S., additional, Bayerlein, R., additional, Beck, D., additional, Belov, V., additional, Breidenbach, M., additional, Brunner, T., additional, Cao, G.F., additional, Cen, W.R., additional, Chambers, C., additional, Cleveland, B., additional, Coon, M., additional, Craycraft, A., additional, Cree, W., additional, Daniels, T., additional, Danilov, M., additional, Daugherty, S.J., additional, Daughhetee, J., additional, Davis, J., additional, Delaquis, S., additional, Mesrobian-Kabakian, A. Der, additional, DeVoe, R., additional, Dilling, J., additional, Dolgolenko, A., additional, Dolinski, M.J., additional, Fairbank, W., additional, Farine, J., additional, Feyzbakhsh, S., additional, Fierlinger, P., additional, Fudenberg, D., additional, Graham, K., additional, Gratta, G., additional, Hall, C., additional, Herrin, S., additional, Hoessl, J., additional, Hufschmidt, P., additional, Hughes, M., additional, Jamil, A., additional, Jewell, M.J., additional, Johnson, A., additional, Johnston, S., additional, Karelin, A., additional, Kaufman, L.J., additional, Koffas, T., additional, Kravitz, S., additional, Krücken, R., additional, Kuchenkov, A., additional, Kumar, K.S., additional, Lan, Y., additional, LePort, F., additional, Li, S., additional, Licciardi, C., additional, Lin, Y.H., additional, Mackay, D., additional, Marino, M.G., additional, Michel, T., additional, Mong, B., additional, Moore, D., additional, Murray, K., additional, Neilson, R., additional, Nelson, R., additional, Njoya, O., additional, Odian, A., additional, Ostrovskiy, I., additional, Pocar, A., additional, Pushkin, K., additional, Retière, F., additional, Rowson, P.C., additional, Russell, J.J., additional, Schubert, A., additional, Sinclair, D., additional, Smith, E., additional, Stekhanov, V., additional, Tarka, M., additional, Tolba, T., additional, Tsang, R., additional, Wagenpfeil, M., additional, Waite, A., additional, Walton, J., additional, Walton, T., additional, Wamba, K., additional, Weber, M., additional, Wen, L.J., additional, Wichoski, U., additional, Wodin, J., additional, Yang, L., additional, Yen, Y.-R., additional, Zeldovich, O.Ya., additional, Zettlemoyer, J., additional, and Ziegler, T., additional

Published
2017
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137. The Heavy Photon Search beamline and its performance

Author

Baltzell, N., primary, Egiyan, H., additional, Ehrhart, M., additional, Field, C., additional, Freyberger, A., additional, Girod, F.-X., additional, Holtrop, M., additional, Jaros, J., additional, Kalicy, G., additional, Maruyama, T., additional, McKinnon, B., additional, Moffeit, K., additional, Nelson, T., additional, Odian, A., additional, Oriunno, M., additional, Paremuzyan, R., additional, Stepanyan, S., additional, Tiefenback, M., additional, Uemura, S., additional, Ungaro, M., additional, and Vance, H., additional

Published
2017
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139. RADIO SIGNALS FROM PHOTON BEAMS IN SAND AND SALT

Author

D. WILLIAMS, P. GORHAM, E. GUILLIAN, R. MILINCIC, P. MIOCINOVIC, D. SALTZBERG, R. C. FIELD, R. IVERSON, A. ODIAN, D. WALZ, G. RESCH, and P. SCHOESSOW

Subjects
Physics, Nuclear and High Energy Physics, Optics, business.industry, Linear polarization, Photon beams, Astronomy and Astrophysics, Field strength, Polarization (waves), business, Atomic and Molecular Physics, and Optics, Coherence (physics)
Abstract

In this paper I describe the setup and results of two beamtests which demonstrated the existence and properties of the Askar'yan effect in sand and salt. We observed coherence, 100% linear polarization, and field strength in agreement with simulations. We also demonstrated the possibility of tracking the shower direction with polarization information.

Published
2006
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140. Measurement of pressure dependent fluorescence yield of air: Calibration factor for UHECR detectors

Author

J.W. Belz, G.W. Burt, Z. Cao, F.Y. Chang, C.C. Chen, C.W. Chen, P. Chen, C. Field, J. Findlay, P. Hüntemeyer, M.A. Huang, W.-Y.P. Hwang, R. Iverson, B.F. Jones, C.C.H. Jui, M. Kirn, G.-L. Lin, E.C. Loh, M.M. Maestas, N. Manago, K. Martens, J.N. Matthews, J.S.T. Ng, A. Odian, K. Reil, J.D. Smith, R. Snow, P. Sokolsky, R.W. Springer, J.R. Thomas, S.B. Thomas, G.B. Thomson, D. Walz, and A. Zech

Subjects
Physics, Photon, 010308 nuclear & particles physics, Astrophysics (astro-ph), FOS: Physical sciences, chemistry.chemical_element, Astronomy and Astrophysics, Electron, Astrophysics, 01 natural sciences, Nitrogen, Charged particle, Linear particle accelerator, chemistry, Yield (chemistry), Torr, 0103 physical sciences, Calibration, Atomic physics, 010306 general physics
Abstract

In a test experiment at the Final Focus Test Beam of the Stanford Linear Accelerator Center, the fluorescence yield of 28.5 GeV electrons in air and nitrogen was measured. The measured photon yields between 300 and 400 nm at 1 atm and 29 deg C are Y(760 Torr, air) = 4.42 +/- 0.73 and Y(760 Torr, nitrogen) = 29.2 +/- 4.8 photons per electron per meter. Assuming that the fluorescence yield is proportional to the energy deposition of a charged particle traveling through air, good agreement with measurements at lower particle energies is observed., Comment: 22 pages, 14 figures, 2 tables, submitted to Astroparticle Physics

Published
2006
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141. Investigation of radioactivity-induced backgrounds in EXO-200

Author

T. Daniels, C. Y. Prescott, A. S. Johnson, Douglas H Beck, T. N. Johnson, M. J. Jewell, A. Dolgolenko, D. Fudenberg, Y-R Yen, K. Twelker, J. B. Albert, P. C. Rowson, A. Pocar, M. Hughes, A. Piepke, A. P. Waite, I. Ostrovskiy, J. Farine, R. MacLellan, B. Mong, R. Nelson, U. Wichoski, S. Delaquis, V. Belov, S. Herrin, A Rivas, M. Danilov, A. Craycraft, C. R. Hall, David Moore, A. Schubert, T. Didberidze, A.C. Odian, C. G. Davis, Yuehe Lin, C. Benitez-Medina, Giorgio Gratta, J. Wood, Martin Breidenbach, D. J. Auty, T. Tolba, S. J. Daugherty, J. L. Vuilleumier, P. S. Barbeau, T. Walton, G. Giroux, J. Walton, V.N. Stekhanov, T. Brunner, J. J. Russell, R. Gornea, K. S. Kumar, W. Feldmeier, Marc Weber, David A. Sinclair, Ryan Killick, David Leonard, Thomas Koffas, B. T. Cleveland, W. M. Fairbank, Monica Dunford, A. Kuchenkov, C. Chambers, K. Graham, M. Coon, O. Ya. Zeldovich, A. Karelin, J. Davis, M. Tarka, C. Licciardi, L. J. Kaufman, R. DeVoe, X. S. Jiang, A. Der Mesrobian-Kabakian, E. Smith, S. Kravitz, Liang Yang, M. J. Dolinski, Michael G. Marino, S. Johnston, P. Fierlinger, Liangjian Wen, Guofu Cao, A. Burenkov, and R. Tsang

Subjects
Physics, Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Parameter space, 01 natural sciences, Beta decay, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Double beta decay, 0103 physical sciences, Beta (velocity), Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment
Abstract

The search for neutrinoless double-beta decay (0{\nu}{\beta}{\beta}) requires extremely low background and a good understanding of their sources and their influence on the rate in the region of parameter space relevant to the 0{\nu}{\beta}{\beta} signal. We report on studies of various {\beta}- and {\gamma}-backgrounds in the liquid- xenon-based EXO-200 0{\nu}{\beta}{\beta} experiment. With this work we try to better understand the location and strength of specific background sources and compare the conclusions to radioassay results taken before and during detector construction. Finally, we discuss the implications of these studies for EXO-200 as well as for the next-generation, tonne-scale nEXO detector., Comment: 9 pages, 7 figures, 3 tables

Published
2015

142. Search for $2������$ decay of $^{136}$Xe to the 0$_1^+$ excited state of $^{136}$Ba with EXO-200

Author

200 Collaboration, Albert, J. B., Auty, D. J., Barbeau, P. S., Beck, D., Belov, V., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Chambers, C., Chaves, J., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Daugherty, S. J., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Didberidze, T., Dilling, J., Dolgolenko, A., Dolinski, M. J., Dunford, M., Fairbank, W., Farine, J., Feldmeier, W., Feyzbakhsh, S., Fierlinger, P., Fudenberg, D., Gornea, R., Graham, K., Gratta, G., Hall, C., Hughes, M., Jewell, M. J., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., King, J., Koffas, T., Kravitz, S., Kr��cken, R., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Licciardi, C., Lin, Y. H., Ling, J., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Njoya, O., Nelson, R., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Prescott, C. Y., Reti��re, F., Rowson, P. C., Russell, J. J., Schubert, A., Sinclair, D., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tsang, R., Twelker, K., Vogel, P., Vuilleumier, J. -L., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Winick, T. A., Wood, J., Xu, Q. Y., Yang, L., Yen, Y. -R., and Zeldovich, O. Ya.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences, Nuclear Experiment (nucl-ex)
Abstract

EXO-200 is a single phase liquid xenon detector designed to search for neutrinoless double-beta decay of $^{136}$Xe to the ground state of $^{136}$Ba. We report here on a search for the two-neutrino double-beta decay of $^{136}$Xe to the first $0^+$ excited state, $0^+_1$, of $^{136}$Ba based on a 100 kg$\cdot$yr exposure of $^{136}$Xe. Using a specialized analysis employing a machine learning algorithm, we obtain a 90% CL half-life sensitivity of $1.7 \times 10^{24}$ yr. We find no statistically significant evidence for the $2������$ decay to the excited state resulting in a lower limit of $T^{2��}_{1/2}$ ($0^+ \rightarrow 0^+_1$) $> 6.9 \times 10^{23}$ yr at 90% CL. This observed limit is consistent with the estimated half-life of $2.5\times10^{25}$ yr., 10 pages, 7 figures, 2 tables

Published
2015
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143. Cosmogenic Backgrounds to 0������ in EXO-200

Author

200 Collaboration, Albert, J. B., Auty, D. J., Barbeau, P. S., Beck, D., Belov, V., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Daugherty, S. J., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Didberidze, T., Dilling, J., Dolgolenko, A., Dolinski, M. J., Dunford, M., Fairbank, W., Farine, J., Feldmeier, W., Feyzbakhsh, S., Fierlinger, P., Fudenberg, D., Gornea, R., Graham, K., Gratta, G., Hall, C., Herrin, S., Hughes, M., Jewell, M. J., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Kravitz, S., Kr��cken, R., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Licciardi, C., Lin, Y. H., Ling, J., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Njoya, O., Nelson, R., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Prescott, C. Y., Reti��re, F., Rowson, P. C., Russell, J. J., Schubert, A., Sinclair, D., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tsang, R., Twelker, K., Vuilleumier, J. -L., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wood, J., Yang, L., Yen, Y. -R., and Zeldovich, O. Ya.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Nuclear Experiment (nucl-ex)
Abstract

As neutrinoless double-beta decay experiments become more sensitive and intrinsic radioactivity in detector materials is reduced, previously minor contributions to the background must be understood and eliminated. With this in mind, cosmogenic backgrounds have been studied with the EXO-200 experiment. Using the EXO-200 TPC, the muon flux (through a flat horizontal surface) underground at the Waste Isolation Pilot Plant (WIPP) has been measured to be �� = 4.07 $\pm$ 0.14 (sys) $\pm$ 0.03 (stat) $\times$ $10^{-7}$cm$^{-2}$ s$^{-1}$, with a vertical intensity of $I_{v}$ = 2.97$^{+0.14}_{-0.13}$ (sys) $\pm$ 0.02 (stat) $\times$ $10^{-7}$cm$^{-2}$ s$^{-1}$ sr$^{-1}$. Simulations of muon-induced backgrounds identified several potential cosmogenic radionuclides, though only 137Xe is a significant background for the 136Xe 0������ search with EXO-200. Muon-induced neutron backgrounds were measured using ��-rays from neutron capture on the detector materials. This provided a measurement of 137Xe yield, and a test of the accuracy of the neutron production and transport simulations. The independently measured rates of 136Xe neutron capture and of 137Xe decay agree within uncertainties. Geant4 and FLUKA simulations were performed to estimate neutron capture rates, and these estimates agreed to within ~40% or better with measurements. The ability to identify 136Xe(n,��) events will allow for rejection of 137Xe backgrounds in future 0������ analyses., Published in JCAP, 29 pages, 13 figures

Published
2015
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144. Search for Majoron-emitting modes of double-beta decay of $^{136}$Xe with EXO-200

Author

200 Collaboration, Albert, J. B., Auty, D. J., Barbeau, P. S., Beauchamp, E., Beck, D., Belov, V., Benitez-Medina, C., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Chambers, C., Chaves, J., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Daugherty, S. J., Davis, C. G., Davis, J., DeVoe, R., Delaquis, S., Didberidze, T., Dolgolenko, A., Dolinski, M. J., Dunford, M., Fairbank, W., Farine, J., Feldmeier, W., Fierlinger, P., Fudenberg, D., Giroux, G., Gornea, R., Graham, K., Gratta, G., Hall, C., Herrin, S., Hughes, M., Jewell, M. J., Jiang, X. S., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Kravitz, S., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Leonard, F., Licciardi, C., Lin, Y. H., Ling, J., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Nelson, R., Odian, A., Ostrovskiy, I., Ouellet, C., Piepke, A., Pocar, A., Prescott, C. Y., Rivas, A., Rowson, P. C., Rozo, M. P., Russell, J. J., Schubert, A., Sinclair, D., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tosi, D., Tsang, R., Twelker, K., Vogel, P., Vuilleumier, J. -L., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Yang, L., Yen, Y. -R., and Zeldovich, O. Ya.

Subjects
High Energy Physics - Experiment (hep-ex), Physics - Instrumentation and Detectors, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Nuclear Experiment (nucl-ex), Nuclear Experiment, High Energy Physics - Experiment
Abstract

EXO-200 is a single phase liquid xenon detector designed to search for neutrinoless double-beta decay of $^{136}$Xe. Here we report on a search for various Majoron-emitting modes based on 100 kg$\cdot$yr exposure of $^{136}$Xe. A lower limit of $T^{^{136}Xe}_{1/2} >1.2 \cdot 10^{24}$ yr at 90% C.L. on the half-life of the spectral index = 1 Majoron decay was obtained, corresponding to a constraint on the Majoron-neutrino coupling constant of $|< g^{M}_{ee} >, Comment: Published in PRD. Version 2: Referee comments addressed, journal reference added

Published
2014

145. Kinetics, polymer molecular weights, and microstructure in zirconocene-catalyzed 1-hexene polymerization

Author

Xia Zhao, George Odian, and Albert Rossi

Subjects
chemistry.chemical_classification, Zirconium, Polymers and Plastics, Organic Chemistry, Methylaluminoxane, chemistry.chemical_element, Solution polymerization, Polymer, Catalysis, chemistry.chemical_compound, Monomer, chemistry, Polymerization, Polymer chemistry, Materials Chemistry, Metallocene
Abstract

1-Hexene was polymerized by rac-(dimethylsilyl)bis(4,5,6,7-tetrahydro-1-indenyl)zirconium dichloride catalyst and methylaluminoxane cocatalyst over the temperature range 0-100 °C. The polymerization rate, polymer molecular weight, and polymer microstructure (stereospecificity and regiospecificity) were studied as a function of the temperature and the concentrations of monomer, catalyst, and cocatalyst.

Published
2000
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146. First Search for Lorentz and CPT Violation in Double Beta Decay with EXO-200

Author

Collaboration, EXO-200, Albert, J. B., Barbeau, P. S., Beck, D., Belov, V., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Daugherty, S. J., Davis, C. G., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Díaz, J. S., Didberidze, T., Dilling, J., Dolgolenko, A., Dolinski, M. J., Dunford, M., Fairbank Jr., W., Farine, J., Feyzbkhsh, S., Feldmeier, W., Fierlinger, P., Fudenberg, D., Gornea, R., Graham, K., Gratta, G., Hall, C., Homiller, S., Hughes, M., Jewell, M. J., Jiang, X. S., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Kravitz, S., Krücken, R., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Lin, Y. H., Ling, J., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Nelson, R., Njoya, O., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Prescott, C. Y., Retiére, F., Rowson, P. C., Russell, J. J., Schubert, A., Sinclair, D., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tsang, R., Twelker, K., Vuilleumier, J. -L., Vogel, P., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wood, J., Yang, L., Yen, Y. -R., Zeldovich, O. Ya., Collaboration, EXO-200, Albert, J. B., Barbeau, P. S., Beck, D., Belov, V., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Daugherty, S. J., Davis, C. G., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Díaz, J. S., Didberidze, T., Dilling, J., Dolgolenko, A., Dolinski, M. J., Dunford, M., Fairbank Jr., W., Farine, J., Feyzbkhsh, S., Feldmeier, W., Fierlinger, P., Fudenberg, D., Gornea, R., Graham, K., Gratta, G., Hall, C., Homiller, S., Hughes, M., Jewell, M. J., Jiang, X. S., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Kravitz, S., Krücken, R., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Lin, Y. H., Ling, J., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Nelson, R., Njoya, O., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Prescott, C. Y., Retiére, F., Rowson, P. C., Russell, J. J., Schubert, A., Sinclair, D., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tsang, R., Twelker, K., Vuilleumier, J. -L., Vogel, P., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wood, J., Yang, L., Yen, Y. -R., and Zeldovich, O. Ya.

Abstract

A search for Lorentz- and CPT-violating signals in the double beta decay spectrum of $^{136}$Xe has been performed using an exposure of 100 kg$\cdot$yr with the EXO-200 detector. No significant evidence of the spectral modification due to isotropic Lorentz-violation was found, and a two-sided limit of $-2.65 \times 10^{-5 } \; \textrm{GeV} < \mathring{a}^{(3)}_{\text{of}} < 7.60 \times 10^{-6} \; \textrm{GeV}$ (90% C.L.) is placed on the relevant coefficient within the Standard-Model Extension (SME). This is the first experimental study of the effect of the SME-defined oscillation-free and momentum-independent neutrino coupling operator on the double beta decay process., Comment: 6 pages, 3 figures

Published
2016
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147. Measurement of the Drift Velocity and Transverse Diffusion of Electrons in Liquid Xenon with the EXO-200 Detector

Author

Collaboration, EXO-200, Albert, J. B., Barbeau, P. S., Beck, D., Belov, V., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Cen, W. R., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Daugherty, S. J., Daughhetee, J., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Didberidze, T., Dilling, J., Dolgolenko, A., Dolinski, M. J., Dunford, M., Fairbank Jr., W., Farine, J., Feyzbakhsh, S., Fierlinger, P., Fudenberg, D., Gornea, R., Graham, K., Gratta, G., Hall, C., Hughes, M., Jewell, M. J., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Kravitz, S., Krucken, R., Kuchenkov, A., Kumar, K. S., Lan, Y., Leonard, D. S., Licciardi, C., Lin, Y. H., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Njoya, O., Nelson, R., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Prescott, C. Y., Retiere, F., Rowson, P. C., Russell, J. J., Schubert, A., Sinclair, D., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tsang, R., Twelker, K., Vuilleumier, J. -L., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wood, J., Yang, L., Yen, Y. -R., Zeldovich, O. Ya., Zettlemoyer, J., Collaboration, EXO-200, Albert, J. B., Barbeau, P. S., Beck, D., Belov, V., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Cen, W. R., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Daugherty, S. J., Daughhetee, J., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Didberidze, T., Dilling, J., Dolgolenko, A., Dolinski, M. J., Dunford, M., Fairbank Jr., W., Farine, J., Feyzbakhsh, S., Fierlinger, P., Fudenberg, D., Gornea, R., Graham, K., Gratta, G., Hall, C., Hughes, M., Jewell, M. J., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Kravitz, S., Krucken, R., Kuchenkov, A., Kumar, K. S., Lan, Y., Leonard, D. S., Licciardi, C., Lin, Y. H., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Njoya, O., Nelson, R., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Prescott, C. Y., Retiere, F., Rowson, P. C., Russell, J. J., Schubert, A., Sinclair, D., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tsang, R., Twelker, K., Vuilleumier, J. -L., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wood, J., Yang, L., Yen, Y. -R., Zeldovich, O. Ya., and Zettlemoyer, J.

Abstract

The EXO-200 Collaboration is searching for neutrinoless double beta decay using a liquid xenon (LXe) time projection chamber. This measurement relies on modeling the transport of charge deposits produced by interactions in the LXe to allow discrimination between signal and background events. Here we present measurements of the transverse diffusion constant and drift velocity of electrons at drift fields between 20~V/cm and 615~V/cm using EXO-200 data. At the operating field of 380~V/cm EXO-200 measures a drift velocity of 1.705$_{-0.010}^{+0.014}$~mm/$\mu$s and a transverse diffusion coefficient of 55$\pm$4~cm$^2$/s., Comment: 9 pages, 7 figures, added minor clarifications recommended by the reviewer on E-field non-uniformities, minor edits to formatting of figures to conform with journal requirements

Published
2016
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148. The Heavy Photon Search beamline and its performance

Author

Baltzell, N., Egiyan, H., Ehrhart, M., Field, C., Freyberger, A., Girod, F. -X., Holtrop, M., Jaros, J., Kalicy, G., Maruyama, T., McKinnon, B., Moffeit, K., Nelson, T., Odian, A., Oriunno, M., Paremuzyan, R., Stepanyan, S., Tiefenback, M., Uemura, S., Ungaro, M., Vance, H., Baltzell, N., Egiyan, H., Ehrhart, M., Field, C., Freyberger, A., Girod, F. -X., Holtrop, M., Jaros, J., Kalicy, G., Maruyama, T., McKinnon, B., Moffeit, K., Nelson, T., Odian, A., Oriunno, M., Paremuzyan, R., Stepanyan, S., Tiefenback, M., Uemura, S., Ungaro, M., and Vance, H.

Abstract

The Heavy Photon Search (HPS) is an experiment to search for a hidden sector photon, aka a heavy photon or dark photon, in fixed target electroproduction at the Thomas Jefferson National Accelerator Facility (JLab). The HPS experiment searches for the e$^+$e$^-$ decay of the heavy photon with bump hunt and detached vertex strategies using a compact, large acceptance forward spectrometer, consisting of a silicon microstrip detector (SVT) for tracking and vertexing, and a PbWO$_4$ electromagnetic calorimeter for energy measurement and fast triggering. To achieve large acceptance and good vertexing resolution, the first layer of silicon detectors is placed just 10 cm downstream of the target with the sensor edges only 500 $\mu$m above and below the beam. Placing the SVT in such close proximity to the beam puts stringent requirements on the beam profile and beam position stability. As part of an approved engineering run, HPS took data in 2015 and 2016 at 1.05 GeV and 2.3 GeV beam energies, respectively. This paper describes the beam line and its performance during that data taking.

Published
2016
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149. An Optimal Energy Estimator to Reduce Correlated Noise for the EXO-200 Light Readout

Author

Collaboration, EXO-200, Davis, C. G., Hall, C., Albert, J. B., Barbeau, P. S., Beck, D., Belov, V., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Cen, W. R., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Daugherty, S. J., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Didberidze, T., Dilling, J., Dolgolenko, A., Dolinski, M. J., Dunford, M., Fairbank Jr., W., Farine, J., Feldmeier, W., Feyzbakhsh, S., Fierlinger, P., Fudenberg, D., Gornea, R., Graham, K., Gratta, G., Hughes, M., Jewell, M. J., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Kravitz, S., Krücken, R., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Licciardi, C., Lin, Y. H., Ling, J., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Njoya, O., Nelson, R., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Prescott, C. Y., Retière, F., Rowson, P. C., Russell, J. J., Schubert, A., Sinclair, D., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tsang, R., Twelker, K., Vuilleumier, J. -L., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wood, J., Yang, L., Yen, Y. -R., Zeldovich, O. Ya., Collaboration, EXO-200, Davis, C. G., Hall, C., Albert, J. B., Barbeau, P. S., Beck, D., Belov, V., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Cen, W. R., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Daugherty, S. J., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Didberidze, T., Dilling, J., Dolgolenko, A., Dolinski, M. J., Dunford, M., Fairbank Jr., W., Farine, J., Feldmeier, W., Feyzbakhsh, S., Fierlinger, P., Fudenberg, D., Gornea, R., Graham, K., Gratta, G., Hughes, M., Jewell, M. J., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Kravitz, S., Krücken, R., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Licciardi, C., Lin, Y. H., Ling, J., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Njoya, O., Nelson, R., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Prescott, C. Y., Retière, F., Rowson, P. C., Russell, J. J., Schubert, A., Sinclair, D., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tsang, R., Twelker, K., Vuilleumier, J. -L., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wood, J., Yang, L., Yen, Y. -R., and Zeldovich, O. Ya.

Abstract

The energy resolution of the EXO-200 detector is limited by electronics noise in the measurement of the scintillation response. Here we present a new technique to extract optimal scintillation energy measurements for signals split across multiple channels in the presence of correlated noise. The implementation of these techniques improves the energy resolution of the detector at the neutrinoless double beta decay Q-value from $\left[1.9641\pm 0.0039\right]\%$ to $\left[1.5820\pm 0.0044\right]\%$., Comment: 21 pages, 8 figures, 1 table

Published
2016
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150. Cosmogenic backgrounds to 0νββ in EXO-200

Author

Albert, J.B., primary, Auty, D.J., additional, Barbeau, P.S., additional, Beck, D., additional, Belov, V., additional, Breidenbach, M., additional, Brunner, T., additional, Burenkov, A., additional, Cao, G.F., additional, Chambers, C., additional, Cleveland, B., additional, Coon, M., additional, Craycraft, A., additional, Daniels, T., additional, Danilov, M., additional, Daugherty, S.J., additional, Davis, J., additional, Delaquis, S., additional, Mesrobian-Kabakian, A. Der, additional, DeVoe, R., additional, Didberidze, T., additional, Dilling, J., additional, Dolgolenko, A., additional, Dolinski, M.J., additional, Dunford, M., additional, Jr., W. Fairbank, additional, Farine, J., additional, Feldmeier, W., additional, Feyzbakhsh, S., additional, Fierlinger, P., additional, Fudenberg, D., additional, Gornea, R., additional, Graham, K., additional, Gratta, G., additional, Hall, C., additional, Herrin, S., additional, Hughes, M., additional, Jewell, M.J., additional, Johnson, A., additional, Johnson, T.N., additional, Johnston, S., additional, Karelin, A., additional, Kaufman, L.J., additional, Killick, R., additional, Koffas, T., additional, Kravitz, S., additional, Krücken, R., additional, Kuchenkov, A., additional, Kumar, K.S., additional, Leonard, D.S., additional, Licciardi, C., additional, Lin, Y.H., additional, Ling, J., additional, MacLellan, R., additional, Marino, M.G., additional, Mong, B., additional, Moore, D., additional, Njoya, O., additional, Nelson, R., additional, Odian, A., additional, Ostrovskiy, I., additional, Piepke, A., additional, Pocar, A., additional, Prescott, C.Y., additional, Retière, F., additional, Rowson, P.C., additional, Russell, J.J., additional, Schubert, A., additional, Sinclair, D., additional, Smith, E., additional, Stekhanov, V., additional, Tarka, M., additional, Tolba, T., additional, Tsang, R., additional, Twelker, K., additional, Vuilleumier, J.-L., additional, Waite, A., additional, Walton, J., additional, Walton, T., additional, Weber, M., additional, Wen, L.J., additional, Wichoski, U., additional, Wood, J., additional, Yang, L., additional, Yen, Y.-R., additional, and Zeldovich, O.Ya., additional

Published
2016
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