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Browsing by Author "Gomez, H."

Now showing 1 - 5 of 5
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    Characterization of the spontaneous light emission of the PMTs used in the Double Chooz experiment
    Abe, Y.; Abrahao, T.; Almazan, H.; Alt, C.; Appel, S.; Baussan, E.; Bekman, I.; Bergevin, M.; Bezerra, T. J. C.; Bezrukhov, Leonid B.; Blucher, E.; Brugiere, T.; Buck, C.; Busenitz, J.; Cabrera, A.; Calvo, E.; Camilleri, Leslie; Carr, Rachel E.; Cerrada, M.; Chauveau, E.; Chimenti, P.; Collin, A. P.; Conover, E.; Conrad, Janet M.; Crespo-Anadon, J. I.; Crum, K.; Cucoanes, A. S.; Damon, E.; Dawson, J. V.; de Kerret, H.; Dhooghe, J.; Dietrich, D.; Djurcic, Zelimir; dos Anjos, J. C.; Dracos, M.; Etenko, A.; Fallot, M.; Felde, J.; Fernandes, S. M.; Fischer, V.; Franco, D.; Franke, M.; Furuta, H.; Gil-Botella, I.; Giot, L.; Goger-Neff, M.; Gomez, H.; Gonzalez, L. F. G.; Goodenough, L.; Goodman, M. C.; Haag, N.; Hara, T.; Haser, J.; Hellwig, D.; Hofmann, M.; Horton-Smith, Glenn A.; Hourlier, A.; Ishitsuka, M.; Jiménez, S.; Jochum, J.; Jollet, C.; Kaether, F.; Kalousis, L. N.; Kamyshkov, Y.; Kaneda, M.; Kaplan, D. M.; Kawasaki, T.; Kemp, E.; Kryn, D.; Kuze, M.; Lachenmaier, Tobias; Lane, C. E.; Lasserre, T.; Letourneau, A.; Lhuillier, D.; Lima, H. P.; Lindner, M.; Lopez-Castano, J. M.; LoSecco, J. M.; Lubsandorzhiev, B. K.; Lucht, S.; Maeda, J.; Mariani, Camillo; Maricic, Jelena; Martino, J.; Matsubara, T.; Mention, G.; Meregaglia, A.; Miletic, T.; Milincic, R.; Minotti, A.; Nagasaka, Y.; Navas-Nicolás, D.; Novella, P.; Nunokawa, H.; Oberauer, L.; Obolensky, M.; Onillon, A.; Osborn, A.; Palomares, C.; Pepe, I. M.; Perasso, S.; Porta, A.; Pronost, G.; Reichenbacher, J.; Reinhold, B.; Roehling, M.; Roncin, R.; Rybolt, B.; Sakamoto, Y.; Santorelli, R.; Schilithz, A. C.; Schoenert, S.; Schoppmann, S.; Shaevitz, Marjorie Hansen; Sharankova, R.; Shrestha, D.; Sibille, V.; Sinev, V.; Skorokhvatov, Mikhail D.; Smith, E.; Soiron, M.; Spitz, Joshua; Stahl, A.; Stancu, Ion; Stokes, Lee F. F.; Strait, M.; Suekane, F.; Sukhotin, S.; Sumiyoshi, T.; Sun, Y.; Svoboda, R.; Terao, K.; Tonazzo, A.; Thi, H. H. T.; Valdiviesso, G. A.; Vassilopoulos, N.; Verdugo, A.; Veyssiere, C.; Vivier, M.; von Feilitzsch, F.; Wagner, S.; Walsh, N.; Watanabe, H.; Wiebusch, C.; Wurm, M.; Yang, G.; Yermia, F.; Zimmer, V. (IOP, 2016-08-01)
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    The Double Chooz antineutrino detectors
    de Kerret, H.; Abe, Y.; Aberle, C.; Abrahão, T.; Ahijado, J. M.; Akiri, T.; Alarcón, J. M.; Alba, J.; Almazan, H.; dos Anjos, J. C.; Appel, S.; Ardellier, F.; Barabanov, I.; Barriere, J. C.; Baussan, E.; Baxter, A.; Bekman, I.; Bergevin, M.; Bernstein, A.; Bertoli, W.; Bezerra, T. J. C.; Bezrukov, L.; Blanco, C.; Bleurvacq, N.; Blucher, E.; Bonet, H.; Bongrand, M.; Bowden, N. S.; Brugière, T.; Buck, C.; Avanzini, M. B.; Busenitz, J.; Cabrera, A.; Caden, E.; Calvo, E.; Camilleri, L.; Carr, R.; Cazaux, S.; Cela, J. M.; Cerrada, M.; Chang, P. J.; Charon, P.; Chauveau, E.; Chimenti, P.; Classen, T.; Collin, A. P.; Conover, E.; Conrad, J. M.; Cormon, S.; Corpace, O.; Courty, B.; Crespo-Anadón, J. I.; Cribier, M.; Crum, K.; Cuadrado, S.; Cucoanes, A.; D’Agostino, M.; Damon, E.; Dawson, J. V.; Dazeley, S.; Dierckxsens, M.; Dietrich, D.; Djurcic, Z.; Dorigo, F.; Dracos, M.; Durand, V.; Efremeko, Y.; Elnimr, M.; Etenko, A.; Falk, E.; Fallot, M.; Fechner, M.; Felde, J.; Fernandes, S. M.; Fernández-Bedoya, C.; Francia, D.; Franco, D.; Fischer, V.; Franke, A. J.; Franke, M.; Furuta, H.; Garcia, F.; Garcia, J.; Gil-Botella, I.; Giot, L.; Givaudan, A.; Göger-Neff, M.; Gomez, H.; Gonzalez, L. F. G.; Goodenough, L.; Goodman, M. C.; Goon, J.; Gramlich, B.; Greiner, D.; Guertin, A.; Guillon, B.; Habib, S. M.; Haddad, Y.; Hara, T.; Hartmann, F. X.; Hartnell, J.; Haser, J.; Hatzikoutelis, A.; Hellwig, D.; Hervé, S.; Hofacker, R.; Horton-Smith, G.; Hourlier, A.; Ishitsuka, M.; Jänner, K.; Jiménez, S.; Jochum, J.; Jollet, C.; Kaether, F.; Kale, K.; Kalousis, L.; Kamyshkov, Y.; Kaneda, M.; Kaplan, D. M.; Karakac, M.; Kawasaki, T.; Kemp, E.; Kibe, Y.; Kirchner, T.; Konno, T.; Kryn, D.; Kutter, T.; Kuze, M.; Lachenmaier, T.; Lane, C. E.; Langbrandtner, C.; Lasserre, T.; Lastoria, C.; Latron, L.; Leonardo, C.; Letourneau, A.; Lhuillier, D.; Lima, H. P.; Lindner, M.; López-Castaño, J. M.; LoSecco, J. M.; Lubsandorzhiev, B.; Lucht, S.; Maeda, J.; Maesano, C. N.; Mariani, Camillo; Maricic, J.; Marie, F.; Martinez, J. J.; Martino, J.; Matsubara, T.; McKee, D.; Meigner, F.; Mention, G.; Meregaglia, A.; Meyer, J. P.; Miletic, T.; Milincic, R.; Millot, J. F.; Minotti, A.; Mirones, V.; Miyata, H.; Mueller, Th. A.; Nagasaka, Y.; Nakajima, K.; Navas-Nicolás, D.; Nikitenko, Y.; Novella, P.; Oberauer, L.; Obolensky, M.; Onillon, A.; Oralbaev, A.; Ostrovskiy, I.; Palomares, C.; Peeters, S. J. M.; Pepe, I. M.; Perasso, S.; Perrin, P.; Pfahler, P.; Porta, A.; Pronost, G.; Puras, J. C.; Quéval, R.; Ramirez, J. L.; Reichenbacher, J.; Reinhold, B.; Reissfelder, M.; Remoto, A.; Reyna, D.; Rodriguez, I.; Röhling, M.; Roncin, R.; Rudolf, N.; Rybolt, B.; Sakamoto, Y.; Santorelli, R.; Sato, F.; Schwan, U.; Schönert, S.; Schoppmann, S.; Scola, L.; Settimo, M.; Shaevitz, M. A.; Sharankova, R.; Sibille, V.; Sida, J.-L.; Sinev, V.; Shrestha, D.; Skorokhvatov, M.; Soldin, P.; Spitz, J.; Stahl, A.; Stancu, I.; Starzynski, P.; Stock, M. R.; Stokes, L. F. F.; Strait, M.; Stüken, A.; Suekane, F.; Sukhotin, S.; Sumiyoshi, T.; Sun, Y.; Sun, Z.; Svoboda, R.; Tabata, H.; Tamura, N.; Terao, K.; Tonazzo, A.; Toral, F.; Toups, M.; Thi, H. T.; Valdivia, F.; Valdiviesso, G.; Vassilopoulos, N.; Verdugo, A.; Veyssiere, C.; Viaud, B.; Vignaud, D.; Vivier, M.; Wagner, S.; Wiebusch, C.; White, B.; Winslow, L.; Worcester, M.; Wurm, M.; Wurtz, J.; Yang, G.; Yáñez, J.; Yermia, F.; Zbiri, K. (2022-09-08)
    This article describes the setup and performance of the near and far detectors in the Double Chooz experiment. The electron antineutrinos of the Chooz nuclear power plant were measured in two identically designed detectors with different average baselines of about 400 m and 1050 m from the two reactor cores. Over many years of data taking the neutrino signals were extracted from interactions in the detectors with the goal of measuring a fundamental parameter in the context of neutrino oscillation, the mixing angle θ13. The central part of the Double Chooz detectors was a main detector comprising four cylindrical volumes filled with organic liquids. From the inside towards the outside there were volumes containing gadolinium-loaded scintillator, gadolinium-free scintillator, a buffer oil and, optically separated, another liquid scintillator acting as veto system. Above this main detector an additional outer veto system using plastic scintillator strips was installed. The technologies developed in Double Chooz were inspiration for several other antineutrino detectors in the field. The detector design allowed implementation of efficient background rejection techniques including use of pulse shape information provided by the data acquisition system. The Double Chooz detectors featured remarkable stability, in particular for the detected photons, as well as high radiopurity of the detector components.
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    Measurement of theta(13) in Double Chooz using neutron captures on hydrogen with novel background rejection techniques
    Abe, Y.; Appel, S.; Abrahao, T.; Almazan, H.; Alt, C.; dos Anjos, J. C.; Barriere, J. C.; Baussan, E.; Bekman, I.; Bergevin, M.; Bezerra, T. J. C.; Bezrukhov, Leonid B.; Blucher, E.; Brugiere, T.; Buck, C.; Busenitz, J.; Cabrera, A.; Camilleri, Leslie; Carr, Rachel E.; Cerrada, M.; Chauveau, E.; Chimenti, P.; Collin, A. P.; Conrad, Janet M.; Crespo-Anadon, J. I.; Crum, K.; Cucoanes, A. S.; Damon, E.; Dawson, J. V.; Dhooghe, J.; Dietrich, D.; Djurcic, Zelimir; Dracos, M.; Etenko, A.; Fallot, M.; von Feilitzsch, F.; Felde, J.; Fernandes, S. M.; Fischer, V.; Franco, D.; Franke, M.; Furuta, H.; Gil-Botella, I.; Giot, L.; Goger-Neff, M.; Gomez, H.; Gonzalez, L. F. G.; Goodenough, L.; Goodman, M. C.; Haag, N.; Hara, T.; Haser, J.; Hellwig, D.; Hofmann, M.; Horton-Smith, Glenn A.; Hourlier, A.; Ishitsuka, M.; Jochum, J.; Jollet, C.; Kaether, F.; Kalousis, L. N.; Kamyshkov, Y.; Kaneda, M.; Kaplan, D. M.; Kawasaki, T.; Kemp, E.; de Kerret, H.; Kryn, D.; Kuze, M.; Lachenmaier, Tobias; Lane, C. E.; Lasserre, T.; Letourneau, A.; Lhuillier, D.; Lima, H. P.; Lindner, M.; Lopez-Castano, J. M.; LoSecco, J. M.; Lubsandorzhiev, B. K.; Lucht, S.; Maeda, J.; Mariani, Camillo; Maricic, Jelena; Martino, J.; Matsubara, T.; Mention, G.; Meregaglia, A.; Miletic, T.; Milincic, R.; Minotti, A.; Nagasaka, Y.; Navas-Nicolás, D.; Novella, P.; Oberauer, L.; Obolensky, M.; Onillon, A.; Osborn, A.; Palomares, C.; Pepe, I. M.; Perasso, S.; Porta, A.; Pronost, G.; Reichenbacher, J.; Reinhold, B.; Roehling, M.; Roncin, R.; Rybolt, B.; Sakamoto, Y.; Santorelli, R.; Schilithz, A. C.; Schoenert, S.; Schoppmann, S.; Shaevitz, Marjorie Hansen; Sharankova, R.; Shrestha, D.; Sibille, V.; Sinev, V.; Skorokhvatov, Mikhail D.; Smith, E.; Soiron, M.; Spitz, Joshua; Stahl, A.; Stancu, Ion; Stokes, Lee F. F.; Strait, M.; Suekane, F.; Sukhotin, S.; Sumiyoshi, T.; Sun, Y.; Svoboda, R.; Terao, K.; Tonazzo, A.; Thi, H. H. T.; Valdiviesso, G. A.; Vassilopoulos, N.; Veyssiere, C.; Vivier, M.; Wagner, S.; Walsh, N.; Watanabe, H.; Wiebusch, C.; Wurm, M.; Yang, G.; Yermia, F.; Zimmer, V. (Springer, 2016-01-27)
    The Double Chooz collaboration presents a measurement of the neutrino mixing angle θ13 using reactor νe observed via the inverse beta decay reaction in which the neutron is captured on hydrogen. This measurement is based on 462.72 live days data, approximately twice as much data as in the previous such analysis, collected with a detector positioned at an average distance of 1050m from two reactor cores. Several novel techniques have been developed to achieve significant reductions of the backgrounds and systematic uncertainties. Accidental coincidences, the dominant background in this analysis, are suppressed by more than an order of magnitude with respect to our previous publication by a multi-variate analysis. These improvements demonstrate the capability of precise measurement of reactor νe without gadolinium loading. Spectral distortions from the νe reactor flux predictions previously reported with the neutron capture on gadolinium events are confirmed in the independent data sample presented here. A value of sin2 2θ13 = 0.095+0.038−0.039(stat+syst) is obtained from a fit to the observed event rate as a function of the reactor power, a method insensitive to the energy spectrum shape. A simultaneous fit of the hydrogen capture events and of the gadolinium capture events yields a measurement of sin2 2θ13 = 0.088 ± 0.033(stat+syst).
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    The use of camera traps for estimating jaguar Panthera onca abundance and density using capture/recapture analysis
    Silver, Scott C.; Ostro, Linde E. T.; Marsh, L. K.; Maffei, L.; Noss, A. J.; Kelly, Marcella J.; Wallace, R. B.; Gomez, H.; Ayala, G. (Cambridge University Press, 2004-04)
    Across their range jaguars Panthera onca are important conservation icons for several reasons: their important role in ecosystems as top carnivores, their cultural and economic value, and their potential conflicts with livestock. However, jaguars have historically been difficult to monitor. This paper outlines the first application of a systematic camera trapping methodology for abundance estimation of jaguars. The methodology was initially developed to estimate tiger abundance in India. We used a grid of camera traps deployed for 2 months, identified individual animals from their pelage patterns, and estimated population abundance using capture-recapture statistical models. We applied this methodology in a total of five study sites in the Mayan rainforest of Belize, the Chaco dry forest of Bolivia, and the Amazonian rainforest of Bolivia. Densities were 2.4-8.8 adult individuals per 100 km(2), based on 7-11 observed animals, 16-37 combined 'captures' and 'recaptures', 486-2,280 trap nights, and sample areas of 107-458 km(2). The sampling technique will be used to continue long-term monitoring of jaguar populations at the same sites, to compare with further sites, and to develop population models. This method is currently the only systematic population survey technique for jaguars, and has the potential to be applied to other species with individually recognizable markings.
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    Yields and production rates of cosmogenic Li-9 and He-8 measured with the Double Chooz near and far detectors
    de Kerret, H.; Abrahao, T.; Almazan, H.; dos Anjos, J. C.; Appel, S.; Barriere, J. C.; Bekman, I.; Bezerra, T. J. C.; Bezrukhov, Leonid B.; Blucher, E.; Brugiere, T.; Buck, C.; Busenitz, J.; Cabrera, A.; Cerrada, M.; Chauveau, E.; Chimenti, P.; Corpace, O.; Dawson, J. V.; Djurcic, Zelimir; Etenko, A.; Franco, D.; Furuta, H.; Gil-Botella, I.; Givaudan, A.; Gomez, H.; Gonzalez, L. F. G.; Goodman, M. C.; Hara, T.; Haser, J.; Hellwig, D.; Hourlier, A.; Ishitsuka, M.; Jochum, J.; Jollet, C.; Kale, K.; Kaneda, M.; Karakac, M.; Kawasaki, T.; Kemp, E.; Kryn, D.; Kuze, M.; Lachenmaier, Tobias; Lane, C. E.; Lasserre, T.; Lastoria, C.; Lhuillier, D.; Lima, H. P., Jr.; Lindner, M.; Lopez-Castano, J. M.; LoSecco, J. M.; Lubsandorzhiev, B. K.; Maeda, J.; Mariani, Camillo; Maricic, Jelena; Martino, J.; Matsubara, T.; Mention, G.; Meregaglia, A.; Miletic, T.; Milincic, R.; Navas-Nicolás, D.; Novella, P.; Nunokawa, H.; Oberauer, L.; Obolensky, M.; Onillon, A.; Oralbaev, A.; Palomares, C.; Pepe, I. M.; Pronost, G.; Reichenbacher, J.; Reinhold, B.; Settimo, M.; Schoenert, S.; Schoppmann, S.; Scola, L.; Sharankova, R.; Sibille, V.; Sinev, V.; Skorokhvatov, Mikhail D.; Soldin, P.; Stahl, A.; Stancu, Ion; Stokes, Lee F. F.; Suekane, F.; Sukhotin, S.; Sumiyoshi, T.; Sun, Y.; Tonazzo, A.; Veyssiere, C.; Viaud, B.; Vivier, M.; Wagner, S.; Wiebusch, C.; Wurm, M.; Yang, G.; Yermia, F. (Springer, 2018-11-08)
    The yields and production rates of the radioisotopes Li-9 and He-8 created by cosmic muon spallation on C-12, have been measured by the two detectors of the Double Chooz experiment. The identical detectors are located at separate sites and depths, which means that they are subject to different muon spectra. The near (far) detector has an overburden of approximate to 120 m.w.e. (approximate to 300 m.w.e.) corresponding to a mean muon energy of 32.1 +/- 2.0 GeV (63.7 +/- 5.5 GeV). Comparing the data to a detailed simulation of the Li-9 and He-8 decays, the contribution of the He-8 radioisotope at both detectors is found to be compatible with zero. The observed Li-9 yields in the near and far detectors are 5.51 +/- 0.51 and 7.90 +/- 0.51, respectively, in units of 10(-8-1)g(-1)cm(2). The shallow overburdens of the near and far detectors give a unique insight when combined with measurements by KamLAND and Borexino to give the first multi-experiment, data driven relationship between the Li-9 yield and the mean muon energy according to the power law and Y-0 = (0.43 +/- 0.11) x 10(-8-1)g(-1)cm(2). This relationship gives future liquid scintillator based experiments the ability to predict their cosmogenic Li-9 background rates.