Search

Your search keyword '"R.W Ellsworth"' showing total 14 results
Start Over Author "R.W Ellsworth"
14 results on '"R.W Ellsworth"'

1. The High-Altitude Water Cherenkov (HAWC) Observatory in México: The Primary Detector

Author

A.U. Abeysekara, A. Albert, R. Alfaro, C. Alvarez, J.D. Álvarez, M. Araya, J.C. Arteaga-Velázquez, K.P. Arunbabu, D. Avila Rojas, H.A. Ayala Solares, R. Babu, A.S. Barber, A. Becerril, E. Belmont-Moreno, S.Y. BenZvi, O. Blanco, J. Braun, C. Brisbois, K.S. Caballero-Mora, J.I. Cabrera Martínez, T. Capistrán, A. Carramiñana, S. Casanova, M. Castillo, O. Chaparro-Amaro, U. Cotti, J. Cotzomi, S. Coutiño de León, E. de la Fuente, C. de León, T. De Young, R. Diaz Hernandez, B.L. Dingus, M.A. DuVernois, M. Durocher, J.C. Díaz-Vélez, R.W. Ellsworth, K. Engel, C. Espinoza, K.L. Fan, K. Fang, B. Fick, H. Fleischhack, J.L. Flores, N. Fraija, J.A. García-González, G. Garcia-Torales, F. Garfias, G. Giacinti, H. Goksu, M.M. González, A. González-Muñoz, J.A. Goodman, J.P. Harding, E. Hernandez, S. Hernandez, J. Hinton, B. Hona, D. Huang, F. Hueyotl-Zahuantitla, C.M. Hui, T.B. Humensky, P. Hüntemeyer, A. Iriarte, A. Imran, A. Jardin-Blicq, V. Joshi, S. Kaufmann, D. Kieda, G.J. Kunde, A. Lara, R. Lauer, W.H. Lee, D. Lennarz, H. León Vargas, J.T. Linnemann, A.L. Longinotti, G. Luis-Raya, J. Lundeen, K. Malone, V. Marandon, A. Marinelli, O. Martinez, I. Martínez-Castellanos, J. Martínez-Castro, H. Martínez-Huerta, J.A. Matthews, P. Miranda-Romagnoli, T. Montaruli, J.A. Morales-Soto, E. Moreno, M. Mostafá, A. Nayerhoda, L. Nellen, M. Newbold, M.U. Nisa, R. Noriega-Papaqui, T. Oceguera-Becerra, L. Olivera-Nieto, N. Omodei, A. Peisker, Y. Pérez Araujo, E.G. Pérez-Pérez, E. Ponce, J. Pretz, C.D. Rho, D. Rosa-González, E. Ruiz-Velasco, H. Salazar, D. Salazar-Gallegos, F. Salesa Greus, A. Sandoval, M. Schneider, H. Schoorlemmer, J. Serna-Franco, G. Sinnis, A.J. Smith, Y. Son, K. Sparks Woodle, R.W. Springer, I. Taboada, A. Tepe, O. Tibolla, K. Tollefson, I. Torres, R. Torres-Escobedo, R. Turner, F. Ureña-Mena, T.N. Ukwatta, E. Varela, M. Vargas-Magaña, L. Villaseñor, X. Wang, I.J. Watson, F. Werner, S. Westerhoff, E. Willox, I. Wisher, J. Wood, G.B. Yodh, D. Zaborov, A. Zepeda, and H. Zhou

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Nuclear and High Energy Physics, FOS: Physical sciences, High Energy Physics, Molecular Developmental Biology, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract

The High-Altitude Water Cherenkov (HAWC) observatory is a second-generation continuously operated, wide field-of-view, TeV gamma-ray observatory. The HAWC observatory and its analysis techniques build on experience of the Milagro experiment in using ground-based water Cherenkov detectors for gamma-ray astronomy. HAWC is located on the Sierra Negra volcano in M\'exico at an elevation of 4100 meters above sea level. The completed HAWC observatory principal detector (HAWC) consists of 300 closely spaced water Cherenkov detectors, each equipped with four photomultiplier tubes to provide timing and charge information to reconstruct the extensive air shower energy and arrival direction. The HAWC observatory has been optimized to observe transient and steady emission from sources of gamma rays within an energy range from several hundred GeV to several hundred TeV. However, most of the air showers detected are initiated by cosmic rays, allowing studies of cosmic rays also to be performed. This paper describes the characteristics of the HAWC main array and its hardware., Comment: Accepted for publications in Nuclear Inst. and Methods in Physics Research, A (2023) 168253 ( https://www.sciencedirect.com/science/article/abs/pii/S0168900223002437 ); 39 pages, 14 Figures

Published
2023
Full Text
View/download PDF

2. Gamma/Hadron Separation with the HAWC Observatory

Author

R. Alfaro, C. Alvarez, J.D. Álvarez, J.R. Angeles Camacho, J.C. Arteaga-Velázquez, D. Avila Rojas, H.A. Ayala Solares, R. Babu, E. Belmont-Moreno, C. Brisbois, K.S. Caballero-Mora, T. Capistrán, A. Carramiñana, S. Casanova, O. Chaparro-Amaro, U. Cotti, J. Cotzomi, S. Coutiño de León, E. De la Fuente, C. de León, R. Diaz Hernandez, B.L. Dingus, M.A. DuVernois, M. Durocher, J.C. Díaz-Vélez, R.W. Ellsworth, K. Engel, C. Espinoza, K.L. Fan, M. Fernández Alonso, N. Fraija, D. Garcia, J.A. García-González, F. Garfias, M.M. González, J.A. Goodman, J.P. Harding, S. Hernandez, B. Hona, D. Huang, F. Hueyotl-Zahuantitla, P. Hüntemeyer, A. Iriarte, A. Jardin-Blicq, V. Joshi, S. Kaufmann, G.J. Kunde, A. Lara, W.H. Lee, J. Lee, H. León Vargas, J.T. Linnemann, G. Luis-Raya, J. Lundeen, K. Malone, V. Marandon, O. Martinez, J. Martínez-Castro, J.A. Matthews, P. Miranda-Romagnoli, J.A. Morales-Soto, A. Nayerhoda, L. Nellen, M.U. Nisa, R. Noriega-Papaqui, L. Olivera-Nieto, N. Omodei, A. Peisker, Y. Pérez Araujo, E.G. Pérez-Pérez, C.D. Rho, D. Rosa-González, E. Ruiz-Velasco, H. Salazar, F. Salesa Greus, A. Sandoval, P.M. Saz Parkinson, J. Serna-Franco, A.J. Smith, R.W. Springer, O. Tibolla, K. Tollefson, I. Torres, R. Torres-Escobedo, R. Turner, F. Ureña-Mena, L. Villaseñor, X. Wang, I.J. Watson, F. Werner, E. Willox, J. Wood, A. Zepeda, and H. Zhou

Subjects
HAWC - Abteilung Hinton, High Energy Astrophysical Phenomena (astro-ph.HE), Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics::Experiment, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Instrumentation
Abstract

The High Altitude Water Cherenkov (HAWC) gamma-ray observatory observes atmospheric showers produced by incident gamma rays and cosmic rays with energy from 300 GeV to more than 100 TeV. A crucial phase in analyzing gamma-ray sources using ground-based gamma-ray detectors like HAWC is to identify the showers produced by gamma rays or hadrons. The HAWC observatory records roughly 25,000 events per second, with hadrons representing the vast majority ($>99.9\%$) of these events. The standard gamma/hadron separation technique in HAWC uses a simple rectangular cut involving only two parameters. This work describes the implementation of more sophisticated gamma/hadron separation techniques, via machine learning methods (boosted decision trees and neural networks), and summarizes the resulting improvements in gamma/hadron separation obtained in HAWC., 35 pages, 9 figures, published in Nuclear Instruments and Methods in Physics Research Section A

Published
2022

3. Measurement of a small atmospheric ν/ν ratio

Author

Y. Fukuda, T. Hayakawa, E. Ichihara, K. Inoue, K. Ishihara, H. Ishino, Y. Itow, T. Kajita, J. Kameda, S. Kasuga, K. Kobayashi, Y. Kobayashi, Y. Koshio, K. Martens, M. Miura, M. Nakahata, S. Nakayama, A. Okada, M. Oketa, K. Okumura, M. Ota, N. Sakurai, M. Shiozawa, Y. Suzuki, Y. Takeuchi, Y. Totsuka, S. Yamada, M. Earl, A. Habig, J.T. Hong, E. Kearns, S.B. Kim, M. Masuzawa, M.D. Messier, K. Scholberg, J.L. Stone, L.R. Sulak, C.W. Walter, M. Goldhaber, T. Barszczak, W. Gajewski, P.G. Halverson, J. Hsu, W.R. Kropp, L.R. Price, F. Reines, H.W. Sobel, M.R. Vagins, K.S. Ganezer, W.E. Keig, R.W. Ellsworth, S. Tasaka, J.W. Flanagan, A. Kibayashi, J.G. Learned, S. Matsuno, V. Stenger, D. Takemori, T. Ishii, J. Kanzaki, T. Kobayashi, K. Nakamura, K. Nishikawa, Y. Oyama, A. Sakai, M. Sakuda, O. Sasaki, S. Echigo, M. Kohama, A.T. Suzuki, T.J. Haines, E. Blaufuss, R. Sanford, R. Svoboda, M.L. Chen, Z. Conner, J.A. Goodman, G.W. Sullivan, M. Mori, F. Goebel, J. Hill, C.K. Jung, C. Mauger, C. McGrew, E. Sharkey, B. Viren, C. Yanagisawa, W. Doki, T. Ishizuka, Y. Kitaguchi, H. Koga, K. Miyano, H. Okazawa, C. Saji, M. Takahata, A. Kusano, Y. Nagashima, M. Takita, T. Yamaguchi, M. Yoshida, M. Etoh, K. Fujita, A. Hasegawa, T. Hasegawa, S. Hatakeyama, T. Iwamoto, T. Kinebuchi, M. Koga, T. Maruyama, H. Ogawa, M. Saito, A. Suzuki, F. Tsushima, M. Koshiba, M. Nemoto, K. Nishijima, T. Futagami, Y. Hayato, Y. Kanaya, K. Kaneyuki, Y. Watanabe, D. Kielczewska, R. Doyle, J. George, A. Stachyra, L. Wai, J. Wilkes, and K. Young

Subjects
Momentum, Physics, Nuclear and High Energy Physics, Particle physics, High Energy Physics::Phenomenology, Monte Carlo method, Detector, Theoretical models, High Energy Physics::Experiment, Production (computer science), Atmospheric neutrino, Nuclear Experiment, Visible energy
Abstract

From an exposure of 25.5~kiloton-years of the Super-Kamiokande detector, 900 muon-like and 983 electron-like single-ring atmospheric neutrino interactions were detected with momentum $p_e > 100$ MeV/$c$, $p_\mu > 200$ MeV/$c$, and with visible energy less than 1.33 GeV. Using a detailed Monte Carlo simulation, the ratio $(\mu/e)_{DATA}/(\mu/e)_{MC}$ was measured to be $0.61 \pm 0.03(stat.) \pm 0.05(sys.)$, consistent with previous results from the Kamiokande, IMB and Soudan-2 experiments, and smaller than expected from theoretical models of atmospheric neutrino production.

Published
1998
Full Text
View/download PDF

4. The status of the CYGNUS experiment: Past, present, and future

Author

Todd J. Haines, D. Berley, C.Y. Chang, B.L. Dingus, J.A. Goodman, T.J. Haines, M. Stark, R.L. Burman, D.R. Cady, C.M. Hoffman, J. Lloyd-Evans, D.E. Nagle, M. Potter, V.D. Sandberg, C.A. Wilkinson, D.E. Alexandreas, R.C. Allen, S. Biller, G.M. Dion, X-Q Lu, P.R. Vishwanath, G.B. Yodh, and R.W. Ellsworth

Subjects
Physics, Nuclear and High Energy Physics, Air shower, Muon, Neutrino detector, Astronomy, Cosmic ray, Angular resolution, Astrophysics, Neutrino, Atomic and Molecular Physics, and Optics, Particle detector, Lepton
Abstract

The CYGNUS experiment, located in Los Alamos, NM, has been continuously operating since April 2, 1986. The experiment consists of an air shower array and an associated 44 m2 muon detector; its large size, good angular resolution, muon detection, and low energy threshold make it a unique experiment among those currently operating. The experiment has undergone continuous expansion in several stages since it began operation. The experiment, its expansion, and further plans for the future will be described.

Published
1990
Full Text
View/download PDF

5. Limits on the muon flux from neutralino annihilations at the center of the Earth with AMANDA

Author

S.W. Barwick, P. Berghaus, T. Becka, A.C. Pohl, George Japaridze, John Joseph, D. J. Boersma, J. Clem, A. W. Jones, M. Ribordy, A. Davour, C. Pérez de los Heros, J. L. Kelley, H.S. Matis, R. Wischnewski, K. Woschnagg, D.W. Atlee, J. Madsen, P. Ekström, D. Berley, W.R. Edwards, P.O. Hulth, R. Ehrlich, K. Hultqvist, P. Steffen, H. Geenen, J. E. Hart, G. M. Spiczak, A. Meli, M. Kestel, Ph. Olbrechts, K. Kuehn, C.H. Wiebusch, D.Z. Besson, Elisa Resconi, D. Rutledge, L. Thollander, Karen Andeen, T. Neunhöffer, K. Han, J. Ahrens, P. Marciniewski, H. Leich, James E. Braun, R. Nahnhauer, S. Hundertmark, Hakki Ögelman, J. Jacobsen, A. Morey, K.-H. Becker, A. Mokhtarani, D. Bertrand, H. Kawai, E. Blaufuss, T. Castermans, Y. Minaeva, S.M. Movit, J.K. Becker, G.W. Sullivan, P. Herquet, Jodi Cooley, A. Achterberg, K. Beattie, K. Rawlins, A. Silvestri, Elisa Bernardini, H.-G. Sander, R.G. Stokstad, Albrecht Karle, M.G. Greene, H. Miyamoto, Jenni Adams, P. Nießen, M. V. D'Agostino, T. Feser, Soebur Razzaque, K. Münich, G. Wikstrom, C. Song, Peter Mészáros, K. Mase, A. Goldschmidt, X. Bai, J. Dreyer, M. C. Stoufer, O. Bouhali, I. Liubarsky, G.T. Przybylski, R. Ganugapati, R.W. Ellsworth, M.R. Duvoort, C. De Clercq, Teresa Montaruli, E. A. Strahler, G. Kohnen, H. Wissing, R. Schwarz, M. Ackermann, P.B. Price, A. Rizzo, C. Spiering, T. Hauschildt, J. Vandenbroucke, R. M. Gunasingha, D. F. Cowen, Carlos Pena-Garay, M. Hellwig, A. Piegsa, M. Bartelt, S. Patton, Michael Stamatikos, S. Tilav, D. Seckel, R. Morse, J. Lundberg, K. Helbing, Spencer Klein, W. Rhode, J. Rodrı´guez Martino, John Heise, J.A. Goodman, O. Tarasova, R. Porrata, S. Klepser, S. Grullon, Kara Hoffman, A. Tepe, W. Wagner, F. Refflinghaus, M. Krasberg, Juan Carlos Diaz-Velez, Francis Halzen, B. Voigt, S. H. Seo, J.D. Zornoza, T.J. Sumner, J. Gallagher, S. Robbins, D. R. Nygren, J.E. Sopher, O. Fadiran, J.W. Nam, C.P. McParland, M. Leuthold, Chris Wendt, B. Baret, D. Hubert, J. Conrad, T. McCauley, T.K. Gaisser, Dmitry Chirkin, D. Pieloth, S. Böser, A. Groß, L. Köpke, Carsten Rott, K. Hoshina, S. Seunarine, A. Olivas, J. Pretz, Adam Bouchta, D. Turčan, M. Solarz, B. Hughey, D. Hardtke, Xianwu Xu, C. Bohm, H. Waldmann, Dawn Williams, Allan Hallgren, T. Harenberg, N. van Eijndhoven, J.-P. Hülß, D. Hays, C.P. Burgess, K.-H. Kampert, M. Walter, S. Yoshida, Hermann Kolanoski, Joseph T. Hodges, T. Stezelberger, I. Taboada, K. H. Sulanke, R. Bay, H. Landsman, T. Stanev, P. Miočinović, Kael Hanson, R. Hardtke, J.N. Bahcall, K. Filimonov, C. Walck, C. T. Day, Yi Wang, Paolo Desiati, A.R. Fazely, P.A. Evenson, T. Messarius, S. Schlenstedt, T. Burgess, Olga Botner, M. Gurtner, R. Gozzini, Aya Ishihara, A.J. Smith, L. Gerhardt, S. Stoyanov, David A. Schneider, G. C. Hill, G. Yodh, Tyce DeYoung, and P. A. Toale

Subjects
Astroparticle physics, Physics, Antarctic Muon And Neutrino Detector Array, Particle physics, AMANDA, Annihilation, Muon, Dark matter, IceCube, Neutralino, Neutrino telescopes, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, Astronomy and Astrophysics, Nuclear physics, WIMP, High Energy Physics::Experiment, Neutrino
Abstract

A search has been performed for nearly vertically upgoing neutrino-induced muons with the Antarctic Muon And Neutrino Detector Array (AMANDA), using data taken over the three year period 1997–99. No excess above the expected atmospheric neutrino background has been found. Upper limits at 90% confidence level have been set on the annihilation rate of neutralinos at the center of the Earth, as well as on the muon flux at AMANDA induced by neutrinos created by the annihilation products.

Published
2006

6. On the selection of AGN neutrino source candidates for a source stacking analysis with neutrino telescopes

Author

J.K. Becker, O. Tarasova, H. Wissing, H. Waldmann, X. Bai, W. Wagner, J. Braun, J.N. Bahcall, J.L. Kelley, S. Patton, C. Walck, S. Seunarine, A. Groß, K. Helbing, B. Voigt, R. Ehrlich, K. Kuehn, M. Bartelt, K. Filimonov, M.G. Greene, R. Nahnhauer, R. Bay, C. Spiering, Dawn Williams, K. Mase, N. Kitamura, R. Morse, Soebur Razzaque, G.W. Sullivan, G. Wikström, L. Köpke, J. E. Hart, J. Gallagher, D. Hubert, W. Rhode, D. F. Cowen, T.K. Gaisser, D. Hays, J. Madsen, C. Song, Ph. Olbrechts, R. Hardtke, J. Ahrens, A. Karle, T. Castermans, D. Seckel, J. Vandenbroucke, P. L. Biermann, A. Olivas, M. Kestel, T. Hauschildt, S.W. Barwick, T. Stezelberger, D. Bertrand, A. Meli, D. Chirkin, R.W. Ellsworth, D.Z. Besson, S. Grullon, B. Baret, Adam Bouchta, P.A. Evenson, H. Geenen, Carsten Rott, J.A. Goodman, A. Silvestri, K. Beattie, X.W. Xu, Karl-Heinz Kampert, D. Berley, D. Pieloth, C.H. Wiebusch, D. Steele, D.W. Atlee, E. Blaufuss, Allan Hallgren, H. Leich, L. Thollander, M. Walter, M. Krasberg, S. Hundertmark, A. Goldschmidt, T. Burgess, H. Miyamoto, Peter Mészáros, Carlos Pena-Garay, J. Lundberg, J.W. Nam, A. Rizzo, D. Turčan, A.C. Pohl, H.-G. Sander, P.O. Hulth, S. H. Seo, I. Liubarsky, T. Montaruli, D. Rutledge, J.D. Zornoza, F. Halzen, K. Han, J.M. Joseph, C. Bohm, Elisa Bernardini, H. Landsman, K. Hanson, J. Dreyer, K. Hoshina, H. Ögelman, John Heise, S. Böser, K. Rawlins, J. Cooley, D. Schneider, J. Conrad, T. Stanev, C. Wendt, B. Hughey, Jenni Adams, P. Desiati, T. Feser, M. Leuthold, K. Münich, M.C. Stoufer, T. Harenberg, J. Clem, K. Hultqvist, R.H. Minor, Y.-R. Wang, R.G. Stokstad, Jennifer Pretz, R. Lang, H.S. Matis, R. Porrata, S. Klepser, M. Solarz, D.J. Boersma, P. Steffen, M. Ackermann, A.R. Fazely, C. De Clercq, P. Miočinović, W.R. Edwards, M. Stamatikos, G. Kohnen, M.R. Duvoort, A. Mokhtarani, R. M. Gunasingha, R. Ganugapati, M.V. D’Agostino, C.P. McParland, George Japaridze, P. Nießen, S. Yoshida, Elisa Resconi, A. Achterberg, P. Herquet, G.T. Przybylski, P.B. Price, S. Robbins, S. Stoyanov, G. Yodh, I. Taboada, F. Refflinghaus, K.D. Hoffman, C.T. Day, K. Woschnagg, L. Gerhardt, P. Berghaus, D. Hardtke, C.P. Burgess, A. Ishihara, Hermann Kolanoski, A.J. Smith, K.-H. Sulanke, B. Collin, T.J. Sumner, J.E. Sopher, T. Messarius, A. Tepe, H. Kawai, J. Jacobsen, K.-H. Becker, G.M. Spiczak, C. Pérez de los Heros, D.R. Nygren, S. M. Movit, A. W. Jones, R. Wischnewski, A. Davour, N. van Eijndhoven, M. Hellwig, S. Schlenstedt, S. Tilav, J. Hodges, A. Morey, S. Richter, T. Becka, Olga Botner, M. Ribordy, G. C. Hill, T. McCauley, Tyce DeYoung, P. A. Toale, and S.R. Klein

Subjects
AMANDA, Active galactic nucleus, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Cosmic ray, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, IceCube, Luminosity, AGN, Neutrinos, Blazar, Astrophysics::Galaxy Astrophysics, Point sources, Source stacking, Astroparticle physics, Physics, Astrophysics (astro-ph), Astronomy, Astronomy and Astrophysics, Quasar, Neutrino detector, Astronomia, High Energy Physics::Experiment, Neutrino
Abstract

The sensitivity of a search for sources of TeV neutrinos can be improved by grouping potential sources together into generic classes in a procedure that is known as source stacking. In this paper, we define catalogs of Active Galactic Nuclei (AGN) and use them to perform a source stacking analysis. The grouping of AGN into classes is done in two steps: first, AGN classes are defined, then, sources to be stacked are selected assuming that a potential neutrino flux is linearly correlated with the photon luminosity in a certain energy band (radio, IR, optical, keV, GeV, TeV). Lacking any secure detailed knowledge on neutrino production in AGN, this correlation is motivated by hadronic AGN models, as briefly reviewed in this paper. The source stacking search for neutrinos from generic AGN classes is illustrated using the data collected by the AMANDA-II high energy neutrino detector during the year 2000. No significant excess for any of the suggested groups was found., Comment: 43 pages, 12 figures, accepted by Astroparticle Physics

Published
2006

7. 16-N as a calibration source for Super-Kamiokande

Author

E Blaufuss, G Guillian, Y Fukuda, S Fukuda, M Ishitsuka, Y Itow, T Kajita, J Kameda, K Kaneyuki, K Kobayashi, Y Kobayashi, Y Koshio, M Miura, S Moriyama, M Nakahata, S Nakayama, Y Obayashi, A Okada, K Okumura, N Sakurai, M Shiozawa, Y Suzuki, H Takeuchi, Y Takeuchi, T Toshito, Y Totsuka, S Yamada, M Earl, A Habig, E Kearns, M.D Messier, K Scholberg, J.L Stone, L.R Sulak, C.W Walter, M Goldhaber, T Barszczak, D Casper, W Gajewski, W.R Kropp, S Mine, L.R Price, M Smy, H.W Sobel, M.R Vagins, K.S Ganezer, W.E Keig, R.W Ellsworth, S Tasaka, A Kibayashi, J.G Learned, S Matsuno, D Takemori, Y Hayato, T Ishii, T Kobayashi, K Nakamura, Y Oyama, A Sakai, M Sakuda, O Sasaki, S Echigo, M Kohama, A.T Suzuki, T Inagaki, K Nishikawa, T.J Haines, B.K Kim, R Sanford, R Svoboda, M.L Chen, J.A Goodman, G.W Sullivan, J Hill, C.K Jung, K Martens, M Malek, C Mauger, C McGrew, E Sharkey, B Viren, C Yanagisawa, M Kirisawa, S Inaba, C Mitsuda, K Miyano, H Okazawa, C Saji, M Takahashi, M Takahata, Y Nagashima, K Nitta, M Takita, M Yoshida, S.B Kim, M Etoh, Y Gando, T Hasegawa, K Inoue, K Ishihara, T Maruyama, J Shirai, A Suzuki, M Koshiba, Y Hatakeyama, Y Ichikawa, M Koike, K Nishijima, H Fujiyasu, H Ishino, M Morii, Y Watanabe, U Golebiewska, D Kielczewska, S.C Boyd, A.L Stachyra, R.J Wilkes, and K.K Young

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Scale (ratio), Physics::Instrumentation and Detectors, Solar neutrino, Detector, Isotropy, FOS: Physical sciences, Linear particle accelerator, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Neutron generator, Calibration, Physics::Accelerator Physics, Super-Kamiokande, Instrumentation
Abstract

The decay of 16-N is used to cross check the absolute energy scale calibration for solar neutrinos established by the electron linear accelerator (LINAC). A deuterium-tritium neutron generator was employed to create 16-N via the (n,p) reaction on 16-O in the water of the detector. This technique is isotropic and has different systematic uncertainties than the LINAC. The results from this high statistics data sample agree with the absolute energy scale of the LINAC to better than 1%. A natural source of 16-N from the capture of mu^- on 16-O, which is collected as a background to the solar neutrino analysis, is also discussed., Comment: 20 pages, 10 figures, Submitted to NIM A, published version

Published
2000
Full Text
View/download PDF

8. Milagrito: a TeV air-shower array

Author

R. Atkins, W. Benbow, D. Berley, M.-L. Chen, D.G. Coyne, R.S. Delay, B.L. Dingus, D.E. Dorfan, R.W. Ellsworth, C. Espinoza, D. Evans, A. Falcone, L. Fleysher, R. Fleysher, G. Gisler, J.A. Goodman, T.J. Haines, C.M. Hoffman, S. Hugenberger, L.A. Kelley, S. Klein, I. Leonor, J. Macri, M. McConnell, J.F. McCullough, J.E. McEnery, R.S. Miller, A.I. Mincer, M.F. Morales, M.M. Murray, P. Nemethy, G. Paliaga, J.M. Ryan, M. Schneider, B. Shen, A. Shoup, G. Sinnis, A.J. Smith, G.W. Sullivan, T.N. Thompson, O.T. Tumer, K. Wang, M.O. Wascko, S. Westerhoff, D.A. Williams, T. Yang, and G.B. Yodh

Subjects
Physics, Nuclear and High Energy Physics, COSMIC cancer database, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Detector, Astrophysics (astro-ph), Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astrophysics, Air shower, Early results, Milagro, High Energy Physics::Experiment, Instrumentation
Abstract

Milagrito, a large, covered water-Cherenkov detector, was the world's first air-shower-particle detector sensitive to cosmic gamma rays below 1 TeV. It served as a prototype for the Milagro detector and operated from February 1997 to May 1998. This paper gives a description of Milagrito, a summary of the operating experience, and early results that demonstrate the capabilities of this technique., Comment: 38 pages including 24 figures

Published
1999
Full Text
View/download PDF

9. Hadronic cascade curves in iron between 20 and 8000 GeV

Author

S. C. Tonwar, G.B. Yodh, F. Siohan, R. E. Streitmatter, P. R. Viswanath, James R. MacFall, A. S. Ito, and R.W. Ellsworth

Subjects
Nuclear physics, Physics, Range (particle radiation), Particle physics, Cascade, Hadron, Cosmic ray, General Medicine, Calorimeter
Abstract

Cascade curves produced by cosmic ray hadrons in an iron calorimeter with depth 960 g cm−2 have been studied in the energy range 100 e −x L(E) , with x in g cm−2, L(E) = (203±21)+(91±8)log10(E/100 GeV)g cm−2 in the range 20 From this study important conclusions can be drawn concerning the use of thin calorimeters.

Published
1979
Full Text
View/download PDF

10. A new measurement of σp-Feinel and σπ-Feinel at high energies

Author

P. R. Viswanath, A. S. Ito, R.W. Ellsworth, G.B. Yodh, S. C. Tonwar, James R. MacFall, R. E. Streitmatter, and F. Siohan

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Hadron, Cosmic ray, Nuclear physics, Cross section (physics), Transition radiation detector, Pion, High Energy Physics::Experiment, Nuclear cross section, Atomic physics, Nuclear Experiment, Glauber
Abstract

Measurements of the inelastic cross sections for hadron-iron nucleus interactions over the hadron energy range of 100–3000 GeV are reported. The cross sections were obtained from the observed attenuation of unaccompanied cosmic ray hadron beams inside an iron calorimeter containing wide-gap spark chambers. A transition radiation detector was used to measure directly the pion content of the hadron beam. The hadron-iron inelastic cross section is seen to increase by (12 ± 4)% over the energy interval 150 GeV to 1250 GeV. Using a value of 1.26 for the ratio σp-Fe/σπ-Fe derived from Glauber theory we deduce that the pion-iron inelastic cross section increases by (7.7 ± 3.4)% over this energy interval.

Published
1979
Full Text
View/download PDF

11. LPM bremsstrahlung and pair production probabilities in lead and water

Author

R.W. Ellsworth, T. Bowen, Ch. Vankov, Tudor Stanev, and R. E. Streitmatter

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Photon, Pair production, Astrophysics::High Energy Astrophysical Phenomena, Bremsstrahlung, Electron, Atomic and Molecular Physics, and Optics, Energy (signal processing)
Abstract

At very high energies in dense media, the bremsstrahlung and pair production probabilities are suppressed by the Landau-Pomeranchuk-Migdal (LPM) effect. The corrected integral probability functions for bremsstrahlung by electrons of energy 0.1–10 5 TeV and for pair production by photons of energy 10-10 5 TeV are tabulated for lead and water.

Published
1979
Full Text
View/download PDF

12. Muon-Proton Elastic Scattering at High Momentum Transfers

Author

M. J. Tannenbaum, R. L. Cool, R.W. Ellsworth, T. Yamanouchi, H. von Briesen, A. Maschke, Leon M. Lederman, J. H. Tinlot, and A. C. Melissinos

Subjects
Nuclear physics, Elastic scattering, Momentum, Physics, Muon, Proton, Momentum transfer, Form factor (quantum field theory), General Physics and Astronomy, Electron, Atomic physics, Elastic collision
Published
1968
Full Text
View/download PDF

13. Muon-Proton Scattering at High Momentum Transfers

Author

M. J. Tannenbaum, A. Maschke, R.W. Ellsworth, J. H. Tinlot, Leon M. Lederman, R. L. Cool, T. Yamanouchi, and A. C. Melissinos

Subjects
Nuclear physics, Physics, Momentum, Particle physics, Muon, Proton scattering, Momentum transfer, General Physics and Astronomy, Electron, Electric charge, High momentum
Published
1965
Full Text
View/download PDF

14. The experimental identification of individual particles by the observation of transition radiation in the X-ray region

Author

Sherwood Parker, T. Katsura, F. A. Harris, C.B. Brooks, J. H. Cobb, G.B. Yodh, V.Z. Peterson, W.W.M. Allison, R.W. Ellsworth, and J.H. Mulvey

Subjects
Physics, Photon, Argon, Physics::Instrumentation and Detectors, Krypton, X-ray, chemistry.chemical_element, General Medicine, Electron, Radiation, chemistry, Transition radiation, Ionization, Atomic physics, Nuclear Experiment
Abstract

Transition radiation in the X-ray region produced by 1.3 GeV/c and 3.0 GeV/c electrons has been detected using multi-wire proportional chambers (MWPC). The radiation was generated in eleven stacks of 100 mylar foils (thickness 1 2 mil. or 1 6 mil. ) each preceding one of eleven MWPC placed in line; two inch thick slabs of styrofoam were also used. The incident particles, electrons or π−-mesons, passed through the MWPC as well as the foils. Results are given on the numbers of transition radiation photons detected, the energy deposition in the chambers and the relativistic rise of ionisation loss in argon and krypton. The distribution in total pulse height obtained with krypton shows a good separation of π−-mesons and electrons at 3 GeV/c.

Published
1973
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results