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1. Combined sensitivity of JUNO and KM3NeT/ORCA to the neutrino mass ordering

Author: KM3NeT collaboration, S. Aiello, A. Albert, M. Alshamsi, S. Alves Garre, Z. Aly, A. Ambrosone, F. Ameli, M. Andre, G. Androulakis, M. Anghinolfi, M. Anguita, M. Ardid, S. Ardid, J. Aublin, C. Bagatelas, B. Baret, S. Basegmez du Pree, M. Bendahman, F. Benfenati, E. Berbee, A. M. van den Berg, V. Bertin, S. Biagi, M. Boettcher, M. Bou Cabo, J. Boumaaza, M. Bouta, M. Bouwhuis, C. Bozza, H. Brânzaş, R. Bruijn, J. Brunner, R. Bruno, E. Buis, R. Buompane, J. Busto, B. Caiffi, D. Calvo, S. Campion, A. Capone, V. Carretero, P. Castaldi, S. Celli, M. Chabab, N. Chau, A. Chen, S. Cherubini, V. Chiarella, T. Chiarusi, M. Circella, R. Cocimano, J. A. B. Coelho, A. Coleiro, M. Colomer-Molla, R. Coniglione, P. Coyle, A. Creusot, A. Cruz, G. Cuttone, R. Dallier, B. De Martino, I. Di Palma, A. F. Díaz, D. Diego-Tortosa, C. Distefano, A. Domi, C. Donzaud, D. Dornic, M. Dörr, D. Drouhin, T. Eberl, A. Eddyamoui, T. van Eeden, D. van Eijk, I. El Bojaddaini, A. Enzenhöfer, V. Espinosa, P. Fermani, G. Ferrara, M. D. Filipović, F. Filippini, L. A. Fusco, T. Gal, J. García Méndez, A. Garcia Soto, F. Garufi, Y. Gatelet, C. Gatius, N. Geißelbrecht, L. Gialanella, E. Giorgio, S. R. Gozzini, R. Gracia, K. Graf, G. Grella, D. Guderian, C. Guidi, B. Guillon, M. Gutiérrez, J. Haefner, S. Hallmann, H. Hamdaoui, H. van Haren, A. Heijboer, A. Hekalo, L. Hennig, J. J. Hernández-Rey, J. Hofestädt, F. Huang, W. Idrissi Ibnsalih, G. Illuminati, C. W. James, D. Janezashvili, M. de Jong, P. de Jong, B. J. Jung, P. Kalaczyński, O. Kalekin, U. F. Katz, N. R. Khan Chowdhury, G. Kistauri, F. van der Knaap, P. Kooijman, A. Kouchner, V. Kulikovskiy, M. Labalme, R. Lahmann, M. Lamoureux, G. Larosa, C. Lastoria, A. Lazo, R. Le Breton, S. Le Stum, G. Lehaut, O. Leonardi, F. Leone, E. Leonora, N. Lessing, G. Levi, M. Lincetto, M. Lindsey Clark, T. Lipreau, C. LLorens Alvarez, F. Longhitano, D. Lopez-Coto, A. Lygda, L. Maderer, J. Majumdar, J. Mańczak, A. Margiotta, A. Marinelli, C. Markou, L. Martin, J. A. Martínez-Mora, A. Martini, F. Marzaioli, S. Mastroianni, K. W. Melis, G. Miele, P. Migliozzi, E. Migneco, P. Mijakowski, L. S. Miranda, C. M. Mollo, M. Moser, A. Moussa, R. Muller, M. Musumeci, L. Nauta, S. Navas, C. A. Nicolau, B. Nkosi, B. Ó Fearraigh, M. O’Sullivan, M. Organokov, A. Orlando, J. Palacios González, G. Papalashvili, R. Papaleo, A. M. Păun, G. E. Păvălaş, C. Pellegrino, M. Perrin-Terrin, V. Pestel, P. Piattelli, C. Pieterse, O. Pisanti, C. Poirè, V. Popa, T. Pradier, I. Probst, S. Pulvirenti, G. Quéméner, N. Randazzo, S. Razzaque, D. Real, S. Reck, G. Riccobene, A. Romanov, A. Rovelli, F. Salesa Greus, D. F. E. Samtleben, A. Sánchez Losa, M. Sanguineti, D. Santonocito, P. Sapienza, J. Schnabel, M. F. Schneider, J. Schumann, H. M. Schutte, J. Seneca, I. Sgura, R. Shanidze, A. Sharma, A. Sinopoulou, B. Spisso, M. Spurio, D. Stavropoulos, S. M. Stellacci, M. Taiuti, Y. Tayalati, H. Thiersen, S. Tingay, S. Tsagkli, V. Tsourapis, E. Tzamariudaki, D. Tzanetatos, V. Van Elewyck, G. Vasileiadis, F. Versari, D. Vivolo, G. de Wasseige, J. Wilms, R. Wojaczyński, E. de Wolf, T. Yousfi, S. Zavatarelli, A. Zegarelli, D. Zito, J. D. Zornoza, J. Zúñiga, N. Zywucka, JUNO collaboration members, S. Ahmad, J. P. A. M. de André, E. Baussan, C. Bordereau, A. Cabrera, C. Cerna, G. Donchenko, E. A. Doroshkevich, M. Dracos, F. Druillole, C. Jollet, L. N. Kalousis, P. Kampmann, K. Kouzakov, A. Lokhov, B. K. Lubsandorzhiev, S. B. Lubsandorzhiev, A. Meregaglia, L. Miramonti, F. Perrot, L. F. Piñeres Rico, A. Popov, R. Rasheed, M. Settimo, K. Stankevich, H. Steiger, M. R. Stock, A. Studenikin, A. Triossi, W. Trzaska, M. Vialkov, B. Wonsak, J. Wurtz, and F. Yermia
Subjects: Neutrino Detectors and Telescopes (experiments), Oscillation, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract This article presents the potential of a combined analysis of the JUNO and KM3NeT/ORCA experiments to determine the neutrino mass ordering. This combination is particularly interesting as it significantly boosts the potential of either detector, beyond simply adding their neutrino mass ordering sensitivities, by removing a degeneracy in the determination of ∆ m 31 2 $$ {m}_{31}^2 $$ between the two experiments when assuming the wrong ordering. The study is based on the latest projected performances for JUNO, and on simulation tools using a full Monte Carlo approach to the KM3NeT/ORCA response with a careful assessment of its energy systematics. From this analysis, a 5σ determination of the neutrino mass ordering is expected after 6 years of joint data taking for any value of the oscillation parameters. This sensitivity would be achieved after only 2 years of joint data taking assuming the current global best-fit values for those parameters for normal ordering.
Published: 2022
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2. Energy Spectrum of Primary Cosmic Rays According to the Data of the TAIGA Astrophysical Complex

Author: V. V. Prosin, I. I. Astapov, P. A. Bezyazeekov, E. A. Bonvech, A. N. Borodin, N. M. Budnev, A. V. Bulan, D. V. Chernov, A. Chiavassa, A. N. Dyachok, A. R. Gafarov, A. Yu. Garmash, V. M. Grebenyuk, E. O. Gress, O. A. Gress, T. I. Gress, A. A. Grinyuk, O. G. Grishin, M. A. Iliushin, A. D. Ivanova, A. L. Ivanova, N. N. Kalmykov, V. V. Kindin, S. N. Kiryuhin, R. P. Kokoulin, N. I. Kolosov, K. G. Kompaniets, E. E. Korosteleva, V. A. Kozhin, E. A. Kravchenko, A. P. Kryukov, L. A. Kuzmichev, A. A. Lagutin, M. V. Lavrova, Yu. E. Lemeshev, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, S. D. Malakhov, R. R. Mirgazov, R. A. Monkhoev, E. A. Okuneva, E. A. Osipova, A. L. Pakhorukov, A. Pan, A. D. Panov, L. V. Pankov, A. A. Petrukhin, D. A. Podgrudkov, E. G. Popova, E. B. Postnikov, V. S. Ptuskin, A. A. Pushnin, R. I. Raikin, A. V. Razumov, E. V. Rjabov, G. I. Rubtsov, V. S. Samoliga, I. Satyshev, A. Yu. Sidorenkov, A. A. Silaev, A. V. Skurikhin, A. V. Sokolov, L. G. Sveshnikova, V. A. Tabolenko, A. B. Tanaev, B. A. Tarashansky, M. Yu. Ternovoy, L. G. Tkachev, N. A. Ushakov, A. Vaidyanathan, N. V. Volkov, P. A. Volchugov, D. M. Voronin, I. I. Yashin, A. V. Zagorodnikov, and D. P. Zhurov
Subjects: General Physics and Astronomy
Published: 2023
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3. Astroclimate of the High Mountain Plains of the Greater Altai, According to Satellite Remote Sensing Data: Potential for Deploying a Full-Scale Gamma Astronomy Experiment

Author: E. Yu. Mordvin, N. V. Volkov, A. I. Revyakin, R. Togoo, I. I. Astapov, P. A. Bezyazeekov, M. Blank, E. A. Bonvech, A. N. Borodin, M. Bruchner, N. M. Budnev, A. Bulan, A. Vaidyanathan, R. Wischnewski, P. A. Volchugov, D. M. Voronin, A. Yu. Garmash, A. R. Gafarov, V. M. Grebenyuk, O. A. Gress, T. I. Gress, A. A. Grinyuk, O. G. Grishin, A. N. Dyachok, D. P. Zhurov, A. V. Zagorodnikov, A. L. Ivanova, N. N. Kalmykov, V. V. Kindin, S. N. Kiryuhin, R. P. Kokoulin, K. G. Kompaniets, E. E. Korosteleva, V. A. Kozhin, E. A. Kravchenko, A. P. Kryukov, L. A. Kuzmichev, A. Chiavassa, A. A. Lagutin, Yu. E. Lemeshev, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, R. R. Mirgazov, R. Mirzoyan, R. D. Monkhoev, E. A. Osipova, A. L. Pakhorukov, A. Pan, M. I. Panasyuk, L. V. Pankov, A. A. Petrukhin, D. A. Podgrudkov, V. A. Poleschuk, M. Popescu, E. G. Popova, A. Porelli, E. B. Postnikov, V. V. Prosin, V. S. Ptuskin, A. A. Pushnin, R. I. Raikin, G. I. Rubtsov, E. V. Ryabov, Y. I. Sagan, V. S. Samoliga, L. G. Sveshnikova, A. A. Silaev, A. Yu. Sidorenkov, A. V. Skurikhin, M. Slunecka, A. V. Sokolov, Ya. V. Suvorkin, V. A. Tabolenko, A. B. Tanaev, B. A. Tarashansky, M. Yu. Ternovoy, L. G. Tkachev, M. Tluczykont, N. A. Ushakov, D. Horns, D. V. Chernov, and I. I. Yashin
Subjects: General Physics and Astronomy
Published: 2022
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4. Cosmic Ray Study at the Astrophysical Complex TAIGA: Results and Plans

Author: L. A. Kuzmichev, I. I. Astapov, P. A. Bezyazeekov, M. Blank, E. A. Bonvech, A. N. Borodin, M. Brueckner, N. M. Budnev, A. V. Bulan, D. V. Chernov, A. Chiavassa, A. N. Dyachok, A. R. Gafarov, A. Yu. Garmash, V. M. Grebenyuk, O. A. Gress, T. I. Gress, A. A. Grinyuk, O. G. Grishin, D. Horns, A. L. Ivanova, N. N. Kalmykov, V. V. Kindin, S. N. Kiryuhin, R. P. Kokoulin, K. G. Kompaniets, E. E. Korosteleva, V. A. Kozhin, E. A. Kravchenko, A. P. Kryukov, A. A. Lagutin, M. V. Lavrova, Yu. Lemeshev, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, A. D. Lukanov, D. Lukyantsev, R. R. Mirgazov, R. Mirzoyan, R. D. Monkhoev, E. A. Osipova, A. L. Pakhorukov, A. Pan, L. V. Pankov, A. D. Panov, A. A. Petrukhin, D. A. Podgrudkov, V. A. Poleschuk, E. G. Popova, A. Porelli, E. B. Postnikov, V. V. Prosin, V. S. Ptuskin, A. A. Pushnin, R. I. Raikin, A. Razumov, E. Rjabov, G. I. Rubtsov, Y. I. Sagan, V. S. Samoliga, A. Yu. Sidorenkov, A. A. Silaev, A. V. Skurikhin, M. Slunecka, A. V. Sokolov, Y. Suvorkin, L. G. Sveshnikova, V. A. Tabolenko, A. B. Tanaev, B. A. Tarashansky, M. Ternovoy, L. G. Tkachev, M. Tluczykont, N. Ushakov, A. Vaidyanathan, P. A. Volchugov, N. V. Volkov, D. Voronin, R. Wischnewski, I. I. Yashin, A. V. Zagorodnikov, and D. P. Zhurov
Subjects: Nuclear and High Energy Physics, Atomic and Molecular Physics, and Optics
Published: 2021
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5. Detecting Gamma Rays with Energies Greater than 3–4 ТeV from the Crab Nebula and Blazar Markarian 421 by Imaging Atmospheric Cherenkov Telescopes in the TAIGA Experiment

Author: L. G. Sveshnikova, I. I. Astapov, P. A. Bezyazeekov, M. Blank, A. N. Borodin, M. Brückner, N. M. Budnev, A. Bulan, A. Vaidyanathan, R. Wischnewski, P. Volchugov, D. Voronin, A. R. Gafarov, A. Yu. Garmash, V. M. Grebenyuk, O. A. Gress, T. I. Gress, A. A. Grinyuk, O. G. Grishin, A. N. Dyachok, D. P. Zhurov, A. V. Zagorodnikov, A. L. Ivanova, N. N. Kalmykov, V. V. Kindin, S. N. Kiryukhin, V. A. Kozhin, R. P. Kokoulin, K. G. Kompaniets, E. E. Korosteleva, E. A. Kravchenko, A. P. Kryukov, L. A. Kuzmichev, A. Chiavassa, M. Lavrova, A. A. Lagutin, Yu. Lemeshev, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, R. R. Mirgazov, R. Mirzoyan, R. D. Monkhoev, E. A. Osipova, A. Pan, M. I. Panasyuk, L. V. Pankov, A. L. Pakhorukov, A. A. Petrukhin, V. A. Poleschuk, M. Popesku, E. G. Popova, A. Porelli, E. B. Postnikov, V. V. Prosin, V. S. Ptuskin, A. A. Pushnin, R. I. Raikin, G. I. Rubtsov, E. V. Rjabov, Ya. I. Sagan, V. S. Samoliga, A. Yu. Sidorenkov, A. A. Silaev, A. V. Skurikhin, M. Slunecka, A. V. Sokolov, Ya. Suvorkin, V. A. Tabolenko, A. Tanaev, B. A. Tarashansky, M. Ternovoy, L. G. Tkachev, M. Tluczykont, N. Ushakov, D. Horns, and I. I. Yashin
Subjects: 010302 applied physics, 010308 nuclear & particles physics, 0103 physical sciences, General Physics and Astronomy, 01 natural sciences
Published: 2021
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6. First Results from Operating a Prototype Wide-Angle Telescope for the TAIGA Installation

Author: D. A. Podgrudkov, E. A. Bonvech, I. V. Vaiman, D. V. Chernov, I. I. Astapov, P. A. Bezyazeekov, M. Blank, A. N. Borodin, M. Brückner, N. M. Budnev, A. V. Bulan, A. Vaidyanathan, R. Wischnewski, P. A. Volchugov, D. M. Voronin, A. R. Gafarov, O. A. Gress, T. I. Gress, O. G. Grishin, A. Yu. Garmashi, V. M. Grebenyuk, A. V. Grinyuk, A. N. Dyachok, D. P. Zhurov, A. V. Zagorodnikov, A. L. Ivanova, N. N. Kalmykov, V. V. Kindin, S. N. Kiryuhin, R. L. Kokoulin, K. G. Kompaniets, E. E. Korosteleva, V. A. Kozhin, E. A. Kravchenko, A. P. Kryukov, L. A. Kuzmichev, A. Chiavassa, M. Lavrova, A. A. Lagutin, Yu. E. Lemeshev, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, R. R. Mirgazov, R. Mirzoyan, R. D. Monkhoev, E. A. Osipova, A. L. Pakhorukov, A. Pan, M. I. Panasyuk, L. V. Pankov, A. A. Petrukhin, V. A. Poleschuk, M. Popesku, E. G. Popova, A. Porelli, E. B. Postnikov, V. V. Prosin, V. S. Ptuskin, A. A. Pushnin, R. I. Raikin, G. I. Rubtsov, E. V. Ryabov, Ya. I. Sagan, V. S. Samoliga, A. A. Silaev, A. Yu. Sidorenkov, A. V. Skurikhin, M. Slunecka, A. V. Sokolov, L. G. Sveshnikova, Ya. V. Suvorkin, V. A. Tabolenko, A. V. Tanaev, B. A. Tarashansky, M. Yu. Ternovoy, L. G. Tkachev, M. Tluczykont, N. A. Ushakov, D. Horns, and I. V. Yashin
Subjects: 010302 applied physics, 010308 nuclear & particles physics, 0103 physical sciences, General Physics and Astronomy, 01 natural sciences
Published: 2021
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7. Status of the TAIGA Experiment: From Cosmic-Ray Physics to Gamma Astronomy in Tunka Valley

Author: Dmitry Chernov, A. V. Skurikhin, Andrey Sokolov, M. Slunecka, Grigory Rubtsov, N. N. Kalmykov, B. A. Tarashchansky, D. A. Podgrudkov, V. A. Poleschuk, Y. Suvorkin, P. Volchugov, A. L. Pakhorukov, Dieter Horns, N. M. Budnev, A. Tanaev, Roman Raikin, A. N. Dyachok, M. Tluczykont, A. A. Grinyuk, R. R. Mirgazov, A. Haungs, Evgeny Postnikov, N. B. Lubsandorzhiev, A. Pan, T. Marshalkina, Oleg Fedorov, V. Samoliga, V. S. Ptuskin, M. Kleifges, A. Chiavassa, Y. Sagan, R. Mirzoyan, A. Porelli, M. Brueckner, N. Ushakov, T. I. Gress, A. Borodin, V. Lenok, Aleksandr Gafarov, R. Togoo, A. Garmash, Dmitry Zhurov, A. A. Silaev, D. Kostyunin, L. G. Tkachev, A. V. Zagorodnikov, E. A. Osipova, V. Kiryuhin, E. V. Ryabov, Pavel Bezyazeekov, O. G. Grishin, D. Shipilov, A. Ivanova, E. Popova, O. A. Gress, L. G. Sveshnikova, A. Vaidyanathan, L. V. Pankov, B. K. Lubsandorzhiev, V. A. Kozhin, V. V. Kindin, M. Ternovoy, L. A. Kuzmichev, V. M. Grebenyuk, I. I. Astapov, R. Wischnewski, Mikhail Panasyuk, Frank G. Schröder, A. Pushnin, A. Bulan, A. Bonvech, K. G. Kompaniets, D. Voronin, V.A. Tabolenko, E. A. Kravchenko, D. Chernykh, E. E. Korosteleva, S. Malakhov, R. P. Kokoulin, A. A. Petrukhin, Yulia Kazarina, Ig. Yashin, Yu. Lemeshev, V. V. Prosin, Anatoly Lagutin, T. Huege, R. D. Monkhoev, Alexander Kryukov, and A. Sidorenkov
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Observatory, 0103 physical sciences, Taiga, Astronomy, Cosmic ray, Radiation, 010306 general physics, Hybrid approach, 01 natural sciences, Atomic and Molecular Physics, and Optics
Abstract: The importance and advantages of the hybrid approach developed within the TAIGA project for studying the high-energy section of the spectrum of gamma radiation in the Universe are discussed. The pilot complex of the TAIGA gamma observatory with an area of 1 km $${}^{2}$$ is briefly described along with the lines of its development, and the first results obtained on this basis are given.
Published: 2020
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8. A Search for Electron Neutrino Transitions to Sterile States in the BEST Experiment

Author: V. V. Barinov, S. N. Danshin, V. N. Gavrin, V. V. Gorbachev, D. S. Gorbunov, T. V. Ibragimova, Yu. P. Kozlova, L. V. Kravchuk, V. V. Kuzminov, B. K. Lubsandorzhiev, Yu. M. Malyshkin, I. N. Mirmov, A. A. Shikhin, E. P. Veretenkin, B. T. Cleveland, H. Ejiri, S. R. Elliott, I. Kim, R. Massarczyk, D. Frekers, W. C. Haxton, V. A. Matveev, G. V. Trubnikov, J. S. Nico, A. L. Petelin, V. A. Tarasov, A. I. Zvir, R. G. H. Robertson, D. Sinclair, and J. F. Wilkerson
Subjects: High Energy Physics - Experiment (hep-ex), High Energy Physics::Phenomenology, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment, High Energy Physics - Experiment
Abstract: The Baksan Experiment on Sterile Transitions (BEST) probes the gallium anomaly and its possible connections to oscillations between active and sterile neutrinos. Based on the Gallium-Germanium Neutrino Telescope (GGNT) technology of the SAGE experiment, BEST employs two zones of liquid Ga target to explore neutrino oscillations on the meter scale. Oscillations on this short scale could produce deficits in the $^{71}$Ge production rates within the two zones, as well as a possible rate difference between the zones. From July 5th to October 13th 2019, the two-zone target was exposed to a primarily monoenergetic, 3.4-MCi $^{51}$Cr neutrino source 10 times for a total of 20 independent $^{71}$Ge extractions from the two Ga targets. The $^{71}$Ge production rates from the neutrino source were measured from July 2019 to March 2020. At the end of these measurements, the counters were filled with $^{71}$Ge doped gas and calibrated during November 2020. In this paper, results from the BEST sterile neutrino oscillation experiment are presented in details. The ratio of the measured $^{71}$Ge production rates to the predicted rates for the inner and the outer target volumes are calculated from the known neutrino capture cross section. Comparable deficits in the measured ratios relative to predicted values are found for both zones, with the $4 \sigma$ deviations from unity consistent with the previously reported gallium anomaly. If interpreted in the context of neutrino oscillations, the deficits give best fit oscillation parameters of $\Delta m^2=3.3^{+\infty}_{-2.3}$ eV$^2$ and sin$^2 2\theta=0.42^{+0.15}_{-0.17}$, consistent with $\nu_e \rightarrow \nu_s$ oscillations governed by a surprisingly large mixing angle.
Published: 2022
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9. Gamma/Hadron Separation for a Ground Based IACT in Experiment TAIGA Using Machine Learning Methods

Author: Maria Vasyutina, L. Sveshnikova, I. I. Astapov, P. A. Bezyazeekov, M. Blank, E. A. Bonvech, A. N. Borodin, M. Brueckner, N. M. Budnev, A. V. Bulan, D. V. Chernov, A. Chiavassa, A. N. Dyachok, A. R. Gafarov, A. Yu. Garmash, V. M. Grebenyuk, O. A. Gress, T. I. Gress, A. A. Grinyuk, O. G. Grishin, Dieter Horns, A. L. Ivanova, N. N. Kalmykov, V. V. Kindin, S. N. Kiryuhin, R. P. Kokoulin, K. G. Kompaniets, E. E. Korosteleva, V. A. Kozhin, E. A. Kravchenko, A. P. Kryukov, L. A. Kuzmichev, A. A. Lagutin, M. V. Lavrova, Yu. Lemeshev, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, A. D. Lukanov, D. Lukyantsev, R. R. Mirgazov, R. Mirzoyan, R. D. Monkhoev, E. A. Osipova, A. L. Pakhorukov, L. A. Panasenko, A. Pan, L. V. Pankov, A. D. Panov, A. A. Petrukhin, D. A. Podgrudkov, V. A. Poleschuk, M. Popesku, E. G. Popova, A. Porelli, E. B. Postnikov, V. V. Prosin, V. S. Ptuskin, A. A. Pushnin, R. I. Raikin 𝑗, A. Razumov, E. Rjabov, G. I. Rubtsov, Y. I. Sagan, V. S. Samoliga, Andrei Sidorenkov, A. A. Silaev, A. A. Silaev jr, A. V. Skurikhin, M. Slunecka, A. V. Sokolov, Y. Suvorkin, V. A. Tabolenko, A. B. Tanaev, B. A. Tarashansky, M. Ternovoy, L. G. Tkachev, M. Tluczykont, N. Ushakov, A. Vaidyanathan, P. A. Volchugov, N. V. Volkov, D. Voronin, R. Wischnewski, I. I. Yashin, A. V. Zagorodnikov, and D. P. Zhurov
Subjects: Computer science, Hadron, Taiga, Separation (aeronautics), IACT, Random forest, Remote sensing
Published: 2021
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10. Depth of the Maximum of Extensive Air Showers (EASes) and the Mean Mass Composition of Primary Cosmic Rays in the 1015–1018 eV Range of Energies, According to Data from the TUNKA-133 and TAIGA-HiSCORE Arrays for Detecting EAS Cherenkov Light in the Tunkinsk Valley

Author: V. V. Prosin, I. I. Astapov, P. A. Bezyazeekov, A. N. Borodin, M. Brückner, N. M. Budnev, A. Bulan, A. Vaidyanathan, R. Wischnewski, P. Volchugov, D. Voronin, A. R. Gafarov, A. Yu. Garmash, V. M. Grebenyuk, O. A. Gress, T. I. Gress, A. A. Grinyuk, O. G. Grishin, A. N. Dyachok, D. P. Zhurov, A. V. Zagorodnikov, A. L. Ivanova, N. N. Kalmykov, V. V. Kindin, S. N. Kiryuhin, V. A. Kozhin, R. P. Kokoulin, K. G. Kompaniets, E. E. Korosteleva, E. A. Kravchenko, A. P. Kryukov, L. A. Kuzmichev, A. Chiavassa, M. Lavrova, A. A. Lagutin, Yu. Lemeshev, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, R. R. Mirgazov, R. Mirzoyan, R. D. Monkhoev, E. A. Osipova, A. Pan, M. I. Panasyuk, L. V. Pankov, A. L. Pakhorukov, A. A. Petrukhin, V. A. Poleschuk, M. Popesku, E. G. Popova, A. Porelli, E. B. Postnikov, V. S. Ptuskin, A. A. Pushnin, R. I. Raikin, G. I. Rubtsov, E. V. Ryabov, Ya. I. Sagan, V. S. Samoliga, L. G. Sveshnikova, A. Yu. Sidorenkov, A. A. Silaev, A. V. Skurikhin, M. Slunecka, A. V. Sokolov, Y. Suvorkin, V. A. Tabolenko, A. Tanaev, B. A. Tarashansky, M. Ternovoy, L. G. Tkachev, M. Tluczykont, N. Ushakov, D. Horns, and I. I. Yashin
Subjects: 010302 applied physics, 010308 nuclear & particles physics, 0103 physical sciences, General Physics and Astronomy, 01 natural sciences
Published: 2021
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11. Results from the Baksan Experiment on Sterile Transitions (BEST)

Author: V. V. Barinov, B. T. Cleveland, S. N. Danshin, H. Ejiri, S. R. Elliott, D. Frekers, V. N. Gavrin, V. V. Gorbachev, D. S. Gorbunov, W. C. Haxton, T. V. Ibragimova, I. Kim, Yu. P. Kozlova, L. V. Kravchuk, V. V. Kuzminov, B. K. Lubsandorzhiev, Yu. M. Malyshkin, R. Massarczyk, V. A. Matveev, I. N. Mirmov, J. S. Nico, A. L. Petelin, R. G. H. Robertson, D. Sinclair, A. A. Shikhin, V. A. Tarasov, G. V. Trubnikov, E. P. Veretenkin, J. F. Wilkerson, and A. I. Zvir
Subjects: High Energy Physics - Experiment (hep-ex), hep-ex, FOS: Physical sciences, General Physics and Astronomy, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), nucl-ex, Nuclear Experiment, Particle Physics - Experiment, High Energy Physics - Experiment
Abstract: The Baksan Experiment on Sterile Transitions (BEST) was designed to investigate the deficit of electron neutrinos, $\nu_{e}$, observed in previous gallium-based radiochemical measurements with high-intensity neutrino sources, commonly referred to as the \textit{gallium anomaly}, which could be interpreted as evidence for oscillations between $\nu_e$ and sterile neutrino ($\nu_s$) states. A 3.414-MCi \nuc{51}{Cr} $\nu_e$ source was placed at the center of two nested Ga volumes and measurements were made of the production of \nuc{71}{Ge} through the charged current reaction, \nuc{71}{Ga}($\nu_e$,e$^-$)\nuc{71}{Ge}, at two average distances. The measured production rates for the inner and the outer targets respectively are ($54.9^{+2.5}_{-2.4}(\mbox{stat})\pm1.4 (\mbox{syst})$) and ($55.6^{+2.7}_{-2.6}(\mbox{stat})\pm1.4 (\mbox{syst})$) atoms of \nuc{71}{Ge}/d. The ratio ($R$) of the measured rate of \nuc{71}{Ge} production at each distance to the expected rate from the known cross section and experimental efficiencies are $R_{in}=0.79\pm0.05$ and $R_{out}= 0.77\pm0.05$. The ratio of the outer to the inner result is 0.97$\pm$0.07, which is consistent with unity within uncertainty. The rates at each distance were found to be similar, but 20-24\% lower than expected, thus reaffirming the anomaly. These results are consistent with $\nu_e \rightarrow \nu_s$ oscillations with a relatively large $\Delta m^2$ ($>$0.5 eV$^2$) and mixing sin$^2 2\theta$ ($\approx$0.4)., Comment: Paper updated to final version
Published: 2021

12. Evaluation of large area photomultipliers for use in a new Baksan Large Neutrino Telescope project

Author: A. N. Fazliakhmetov, V. N. Gavrin, Arslan Lukanov, A. A. Shikhin, T. V. Ibragimova, Dmitry Voronin, Nikita Ushakov, B. K. Lubsandorzhiev, and Andrei Sidorenkov
Subjects: Physics, Nuclear physics, Photomultiplier, Muon, Neutrino detector, Physics::Instrumentation and Detectors, Observatory, Liquid scintillation counting, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, High Energy Physics::Experiment, Quantum efficiency, Neutrino
Abstract: The Baksan Large Neutrino Telescope is a liquid scintillation neutrino detector with a target mass of 10 kt, which is proposed to be constructed at the Baksan Neutrino Observatory of the Russian Academy of Sciences at a depth of 4700 m.w.e. In addition to the main full-scale detector, this project includes prototypes with target masses of 0.5, 5 and 100 t. This article evaluates photomultipliers (PMTs) Hamamatsu R7081-100 WA-S70 that are used in the first two phases of the project as the main ones. Also this article evaluates PMTs Hamamatsu R5912-100 WA-S70 used for the muon veto system for the 5-t detector prototype. To evaluate the PMTs, the quantum efficiency, single photoelectron response, timing characteristics, anode dark count rate, linearity and long afterpulses were measured.
Published: 2021
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13. Calibration system of EAS Cherenkov arrays using commercial drone helicopter

Author: Dmitry Voronin, B. K. Lubsandorzhiev, Andrei Sidorenkov, A. N. Fazliakhmetov, Nikita Ushakov, and Arslan Lukanov
Subjects: Calibration (statistics), Environmental science, Cherenkov radiation, Drone, Remote sensing
Published: 2021
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14. TAIGA-IACT pointing control and monitoring software status

Author: Dmitriy Zhurov, O. A. Gress, D. S. Lukyantsev, I. I. Astapov, A. K. Awad, P. A. Bezyazeekov, M. Blank, E. A. Bonvech, A. N. Borodin, A. V. Bulan, M. Brueckner, N. M. Budnev, A. Chiavassa, D. V. Chernov, A. N. Dyachok, A. R. Gafarov, A. Yu. Garmash, V. M. Grebenyuk, E. Gress, T. I. Gress, O. G. Grishin, A. A. Grinyuk, Dieter Horns, N. N. Kalmykov, V. V. Kindin, S. N. Kiryuhin, R. P. Kokoulin, K. G. Kompaniets, E. E. Korosteleva, V. A. Kozhin, E. A. Kravchenko, A. P. Kryukov, L. A. Kuzmichev, A. A. Lagutin, M. Lavrova, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, A. D. Lukanov, R. R. Mirgazov, R. Mirzoyan, R. D. Monkhoev, E. A. Osipova, A. L. Pakhorukov, A. Pan, L. V. Pankov, A. D. Panov, A. A. Petrukhin, D. A. Podgrudkov, V. A. Poleschuk, M. Popesku, E. G. Popova, A. Porelli, E. B. Postnikov, V. V. Prosin, V. S. Ptuskin, A. A. Pushnin, R. I. Raikin, A. Y. Razumov, G. I. Rubtsov, E. V. Ryabov, Y. I. Sagan, V. S. Samoliga, A. A. Silaev, A. A. junior Silaev, Andrei Sidorenkov, A. V. Skurikhin, M. Slunecka, A. V. Sokolov, L. G. Sveshnikova, V. A. Tabolenko, B. A. Tarashansky, L. G. Tkachev, R. Togoo, M. Tluczykont, N. Ushakov, A. Vaidyanathan, P. A. Volchugov, N. V. Volkov, D. Voronin, R. Wischnewski, A. V. Zagorodnikov, and I. I. Yashin
Published: 2021
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15. Light concentrators for large-volume detector at the Baksan Neutrino Observatory

Author: T. V. Ibragimova, A. N. Fazliakhmetov, B. K. Lubsandorzhiev, Dmitry Voronin, Arslan Lukanov, O. Smirnov, Nikita Ushakov, Yu. M. Malyshkin, V. N. Gavrin, E. P. Veretenkin, Andrei Sidorenkov, and A. A. Shikhin
Subjects: Physics, Observatory, Astronomy, Neutrino, Large Volume Detector
Published: 2021
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16. A new Baksan Large Neutrino Telescope: the project's status

Author: Dmitry Voronin, Oleg Smirnov, Andrei Sidorenkov, V. N. Gavrin, Evgeniy Veretenkin, T. V. Ibragimova, Arslan Lukanov, B. K. Lubsandorzhiev, Evgeniy Yanovich, V. V. Kuzminov, V. B. Petkov, A. N. Fazliakhmetov, A. M. Gangapshev, Nikita Ushakov, Mahti Kochkarov, V. V. Kazalov, Galina Novikova, Yuri Malyshkin, and A. A. Shikhin
Subjects: Physics, Neutrino telescope, Astronomy
Published: 2021
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17. Development of calibration system for a project of a new Baksan Large Neutrino Telescope

Author: A. A. Shikhin, Andrei Sidorenkov, Dmitry Voronin, A. N. Fazliakhmetov, Nikita Ushakov, B. K. Lubsandorzhiev, Arslan Lukanov, T. V. Ibragimova, and V. N. Gavrin
Subjects: Physics, Calibration (statistics), Neutrino telescope, Astronomy
Published: 2021
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18. Study of Earth’s Heat Flux by Means of Geoneutrino Detection

Author: I. R. Barabanov, V. Sinev, V. P. Zavarzina, B. K. Lubsandorzhiev, A. K. Mezhokh, A. S. Kurlovich, L. B. Bezrukov, V. P. Morgalyuk, and I. S. Karpikov
Subjects: Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Geoneutrino, Astrophysics::High Energy Astrophysical Phenomena, Potassium-40, Atomic and Molecular Physics, and Optics, Physics::Geophysics, Nuclear physics, Flux (metallurgy), Heat flux, Neutrino detector, Internal heating, Borexino, Radioactive decay
Abstract: The heat flux from the Earth’s interior and its connection with the number of neutrinos recorded by detectors at the Earth’s surface are discussed. The values predicted for the geoneutrino fluxes may be matched with experimental data, but the observed flux of the Earth’s internal heat requires the presence of a larger amount of radioactive elements. The amount of uranium and thorium within the Earth is constrained by measurements performed with the aid of modern geoneutrino detectors. This makes it possible to explain completely a flux of 50 TW. There are indications that the flux from the Earth’s interior is 200 to 250 TW. Such a flux could be explained only by the presence of a substantially larger amount of potassium in the Earth. In order to determine precisely the heat flux from the Earth’s interior, it is necessary to measure completely the flux of antineutrinos from all heat-releasing isotopes, including the flux of neutrinos from 40K decay. Possibly, this flux has already been observed at the Borexino detector.
Published: 2019
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19. Geo-Neutrinos and the Earth’s Internal Heat Flux

Author: A. K. Mezhokh, B. K. Lubsandorzhiev, V. P. Zavarzina, V. Sinev, V. P. Morgalyuk, A. S. Kurlovich, and L. B. Bezrukov
Subjects: Physics, Nuclear and High Energy Physics, 010504 meteorology & atmospheric sciences, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Mode (statistics), Crust, Mechanics, Kola Superdeep Borehole, 01 natural sciences, Physics::Geophysics, Thermal conductivity, Flux (metallurgy), Physics::Space Physics, 0103 physical sciences, Astrophysics::Earth and Planetary Astrophysics, Neutrino, Internal heating, Earth (classical element), 0105 earth and related environmental sciences
Abstract: Predictions of geo-neutrino fluxes and the Earth’s internal heat flux made by the Hydride Earth model are discussed. The prediction of geo-neutrino fluxes can be consistent with experimental measured fluxes. The predicted value of the Earth’s internal heat flux is significantly larger than the value experimentally obtained under the assumption that the main mode of heat transport is thermal conductivity. We consider another mode of heat transport in the Earth’s crust: heat transport by hot gases created in the Earth’s crust at great depth. We discuss also experimental data supporting this idea, particularly the temperature profiles obtained in the Kola superdeep borehole.
Published: 2018
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20. Large-volume detector at the Baksan Neutrino Observatory for studies of natural neutrino fluxes for purposes of geo- and astrophysics

Author: P. Yu. Naumov, V. P. Zavarzina, V. I. Gurentsov, V. Sinev, A. M. Pshukov, V. B. Petkov, I. R. Barabanov, B. K. Lubsandorzhiev, A. K. Mezhokh, Sh. I. Umerov, A. M. Gangapshev, Sultim Lubsandorzhiev, V. P. Morgalyuk, Jari Joutsenvaara, V. V. Kazalov, E. A. Yanovich, G. Ya. Novikova, V. V. Kuzminov, A. V. Veresnikova, L. B. Bezrukov, V. Yu. Grishina, T. Enquist, A. Yu. Sidorenkov, A. Virkajarvi, Yu. M. Gavrilyuk, Pasi Kuusiniemi, S. Krokhaleva, and A. S. Kurlovich
Subjects: Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, High Energy Physics::Phenomenology, Astrophysics, Solar neutrino problem, 01 natural sciences, Atomic and Molecular Physics, and Optics, Nuclear physics, Neutrino detector, 0103 physical sciences, Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, Neutrino astronomy, Neutrino oscillation, Large Volume Detector, 010303 astronomy & astrophysics
Abstract: At the Baksan Neutrino Observatory (Institute for Nuclear Research, Russian Academy of Sciences, Moscow) deployed in the Caucasus mountains, it is proposed to create, at a depth corresponding to 4760 mwe, a large-volume neutrino detector on the basis of a liquid scintillator with a target mass of 10 kt. The detector in question is intended for recording natural fluxes of neutrinos whose energy may be as low as 100MeV. Neutrino fluxes from various sources are considered in the present study, and the expected effect in the proposed detector is estimated. The detector hat is being developed at the Baksan Neutrino Observatorywill become part of the world network of neutrino detectors for studying natural neutrino fluxes.
Published: 2017
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21. The TAIGA-HiSCORE array prototype: Status and first results

Author: I. I. Astapov, N. S. Barbashina, A. G. Bogdanov, V. Boreyko, N. M. Budnev, R. Wischnewski, A. R. Gafarov, V. Grebenyuk, O. A. Gress, T. I. Gress, A. A. Grinyuk, O. G. Grishin, N. Gorbunov, A. N. Dyachok, S. N. Epimakhov, A. V. Zagorodnikov, V. L. Zurbanov, A. L. Ivanova, Y. A. Kazarina, N. N. Kalmykov, N. I. Karpov, V. V. Kindin, S. N. Kiryuhin, R. P. Kokoulin, K. G. Kompaniets, E. E. Korosteleva, V. A. Kozhin, E. Kravchenko, M. Kunnas, L. A. Kuzmichev, A. Chiavassa, V. V. Lenok, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, R. R. Mirgazov, R. Mirzoyan, R. D. Monkhoev, R. Nachtigall, A. L. Pakhorukov, E. A. Osipova, M. I. Panasyuk, L. V. Pankov, A. A. Petrukhin, M. Popescu, A. Porelli, A. A. Pushnin, V. A. Poleschuk, E. G. Popova, E. B. Postnikov, V. V. Prosin, V. S. Ptuskin, G. I. Rubtsov, V. S. Samoliga, Y. A. Semeney, A. A. Silaev, A. V. Skurikhin, L. G. Sveshnikova, A. Sokolov, V. A. Tabolenko, B. A. Tarashchansky, L. G. Tkachev, A. V. Tkachenko, M. Tluczykont, O. L. Fedorov, D. Horns, C. Spiering, K. Yurin, and I. I. Yashin
Subjects: 010308 nuclear & particles physics, Observatory, 0103 physical sciences, Taiga, Gamma ray, General Physics and Astronomy, 010303 astronomy & astrophysics, 01 natural sciences, Geology, Remote sensing
Abstract: The design for the TAIGA-HiSCORE array, a part of the TAIGA Gamma Ray Observatory, is considered. The observatory is being constructed in the Tunka Valley, 50 km from Lake Baikal. Preliminary results obtained using the first 28 optical stations of the array are presented.
Published: 2017
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22. On the Negatively Charged Layer of the Earth’s Electric Field

Author: V. P. Zavarzina, V. Sinev, L. B. Bezrukov, A. K. Mezhokh, V. P. Morgaluk, A. S. Kurlovich, and B. K. Lubsandorzhiev
Subjects: Physics, 010504 meteorology & atmospheric sciences, Computational Mechanics, General Physics and Astronomy, Charge (physics), Crust, Electron, Geophysics, 01 natural sciences, Physics::Geophysics, law.invention, Capacitor, Mechanics of Materials, law, Electric field, Physics::Space Physics, 0103 physical sciences, Electrode, Astrophysics::Earth and Planetary Astrophysics, Precipitation, 010303 astronomy & astrophysics, Physics::Atmospheric and Oceanic Physics, Earth (classical element), 0105 earth and related environmental sciences
Abstract: Based on the hydridic Earth model, we propose a hydridic model of the Earth’s electric field. The model predicts that the negative electrode of the Earth’s capacitor is located under the Earth’s crust and the Earth’s fluids carry a positive charge. We have observed an excess of positive charge in the Earth’s crust down to kilometer depths. The model explains the unitary variation of the fair-weather atmospheric electric field strength, the change in atmospheric electric field strength and the precipitation of high-energy electrons during earthquakes.
Published: 2018
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23. Modeling of a MeV-scale Particle Detector Based on Organic Liquid Scintillator

Author: A. N. Fazliakhmetov, V. B. Petkov, V. N. Gavrin, A. M. Gangapshev, T. V. Ibragimova, V. V. Kazalov, D. Yu Kudrin, V. V. Kuzminov, G. Ya. Novikova, B. K. Lubsandorzhiev, Nikita Ushakov, A. Yu. Sidorenkov, E. A. Yanovich, Yu. M. Malyshkin, M. M. Kochkarov, Dmitry Voronin, A. A. Shikhin, and E. P. Veretenkin
Subjects: Physics, Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Physics::Instrumentation and Detectors, Monte Carlo method, Detector, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Scintillator, 01 natural sciences, Particle detector, Optics, Neutrino detector, Observatory, 0103 physical sciences, High Energy Physics::Experiment, Neutrino, 010306 general physics, business, Neutrino oscillation, Instrumentation
Abstract: The detectors based on the liquid scintillator (LS) monitored by an array of photo-multiplier tubes (PMT) are often used in low energy experiments such as neutrino oscillation studies and search for dark matter. Detectors of this kind operate in an energy range spanning from hundreds of keV to a few GeV providing a few percent resolution at energies above 1 MeV and allowing to observe fine spectral features. This article gives a brief overview of relevant physical processes and introduces a new universal simulation tool LSMC (Liquid Scintillator Monte Carlo) for simulation of LS-based detectors equipped with PMT arrays. This tool is based on the Geant4 framework and provides supplementing functionality for ease of configuration and comprehensive output. The usage of LSMC is illustrated by modeling and optimization of a compact detector prototype currently being built at Baksan Neutrino Observatory.
Published: 2019

24. New large-volume detector at the Baksan Neutrino Observatory: Detector prototype

Author: D. Yu Kudrin, Nikita Ushakov, E. A. Yanovich, Arslan Lukanov, A. Yu. Sidorenkov, V. V. Kuzminov, A. A. Shikhin, Dmitry Voronin, V. Kazalov, A. N. Fazliakhmetov, M. M. Kochkarov, V. N. Gavrin, Yu. M. Malyshkin, V. B. Petkov, A. M. Gangapshev, E. P. Veretenkin, B. K. Lubsandorzhiev, T. V. Ibragimova, and G. Ya. Novikova
Subjects: Physics, History, Physics::Instrumentation and Detectors, Observatory, Detector, Astronomy, High Energy Physics::Experiment, Neutrino, Large Volume Detector, Computer Science Applications, Education
Abstract: At the Baksan Neutrino Observatory (Institute for Nuclear Research of the Russian Academy of Sciences, Moscow) deployed in the Caucasus mountains, it is proposed to create, at a depth corresponding to about 4700 mwe (meter water equivalent), a large-volume neutrino detector on the basis of a liquid scintillator with a target mass of 10 kt. This article describes the current state of the first stage of the project, namely a prototype detector with a scintillator mass of 0.5 t. The design of the detector, the equipment and methods used are described.
Published: 2021
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25. First detection of gamma-ray sources at TeV energies with the first imaging air Cherenkov telescope of the TAIGA installation

Author: M. Popesku, V. S. Ptuskin, A. Pushnin, M. Slunecka, M. V. Lavrova, A. Petrukhin, M. Tluczykont, A. Silaev junior, Andrey Sokolov, Grigory Rubtsov, A. N. Dyachok, N. N. Kalmykov, L. A. Kuzmichev, B.A. Tarashansky, V. M. Grebenyuk, M. Ternovoy, N. Ushakov, O. A. Gress, V. A. Kozhin, O. G. Grishin, R. R. Mirgazov, V. Samoliga, A. Ivanova, L. V. Pankov, T. I. Gress, L. G. Sveshikova, N. B. Lubsandorzhiev, Y. Suvorkin, A. Borodin, Aleksandr Gafarov, Evgeny Postnikov, V. A. Poleschuk, E. A. Osipova, Mikhail Panasyuk, A. Bulan, Pavel Bezyazeekov, A. A. Silaev, A. V. Zagorodnikov, D. Zhurov, D. Voronin, A. Chiavassa, A. Porelli, V. V. Kindin, B. K. Lubsandorzhiev, R. Mirzoyan, V.A. Tabolenko, Y. Sagan, A. Yu. Garmash, E. A. Kravchenko, E. E. Korosteleva, L. G. Tkachev, R. P. Kokoulin, K. G. Kompaniets, A. V. Skurikhin, P. Volchugov, A. Pan, A. L. Pakhorukov, Evgenii V Rjabov, N. M. Budnev, A. Tanaev, A. Yu. Sidorenkov, Dieter Horns, A. Vaidyanathan, Roman Raikin, E.G. Popova, A. A. Grinyuk, R. Wischnewski, R. D. Monkhoev, I. I. Yashin, Alexander Kryukov, M. Brückner, Anatoly Lagutin, Yu. Lemeshev, S. Kiryuhin, V. V. Prosin, M. Blank, and I. I. Astapov
Subjects: Telescope, Physics, History, law, Astrophysics::High Energy Astrophysical Phenomena, Taiga, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Astronomy, Cherenkov radiation, Computer Science Applications, Education, law.invention
Abstract: TAIGA array addresses gamma-ray astronomy at energies from a few TeV to several PeV as well as cosmic ray physics from 100 TeV to several EeV. A 1 km2 TAIGA setup will consist of 120 wide-angle detectors of the Cherenkov timing array TAIGA-HiSCORE and three imaging air Cherenkov telescopes with the field of view diameter of 9.6°. In this paper, first experimental results of the first operation stage are presented: signal detection from two gamma-ray sources, the Crab Nebula and Markarian 421, by the first IACT in stand-alone mode. The detected signal is shown to be in agreement with the Monte Carlo expectation. In future, gamma-ray signal will be detected by a larger number of TAIGA telescopes as well as the TAIGA-HiSCORE array, that is, in combined operation mode.
Published: 2020
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26. Development of a novel wide-angle gamma-ray imaging air Cherenkov telescope with SiPM-based camera for the TAIGA hybrid installation

Author: A. Chiavassa, E. A. Bonvech, Anatoly Lagutin, T. I. Gress, Dmitry Chernov, R. D. Monkhoev, R. Mirzoyan, Mihai Popescu, I. I. Yashin, A. Sidorenkov, L. G. Sveshnikova, D. Zhurov, V. Samoliga, V. A. Poleschuk, A. V. Skurikhin, A. Garmash, L. G. Tkachev, N. B. Lubsandorzhiev, E. A. Osipova, R. R. Mirgazov, D. Chernukh, Roman Raikin, Aleksandr Gafarov, Grigory Rubtsov, Oleg Fedorov, Pavel Bezyazeekov, N. N. Kalmykov, D. Voronin, Y. Sagan, A. A. Silaev, A. V. Zagorodnikov, Dieter Horns, A. A. Grinyuk, Mikhail Panasyuk, D. A. Podgrudkov, V. Vorobiov, A. Borodin, A. N. Dyachok, E. A. Kravchenko, B. K. Lubsandorzhiev, M. Brueckner, E. E. Korosteleva, O. A. Gress, A. Pushnin, B.A. Tarashansky, E. Popova, A. A. Petrukhin, Evgeny Postnikov, R. P. Kokoulin, P. Volchugov, V. A. Kozhin, A. L. Pakhorukov, V. V. Kindin, M. Tluczykont, A. Tanaev, Yulia Kazarina, I. I. Astapov, V.A. Tabolenko, R. Wischnewski, Yu. Lemeshev, V. Slunecka, E. Rybov, V. S. Ptuskin, S. Kiryuhin, V. V. Prosin, N. Ushakov, L. V. Pankov, L. M. Ternovoy, Andrey Sokolov, K. G. Kompaniets, A. Ivanova, A. Vaidyanathan, O. Grishin, A. Porelli, A. Pan, N. M. Budnev, L. A. Kuzmichev, V. M. Grebenyuk, Y. Suvorkin, and A. Krykov
Subjects: Physics, Data processing, business.industry, Gamma ray, Cosmic ray, Electromagnetic radiation, law.invention, Telescope, Optics, Silicon photomultiplier, Data acquisition, law, business, Instrumentation, Mathematical Physics, Cherenkov radiation
Published: 2020
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27. An approach for identification of ultrahigh energy extensive air showers with scintillation detectors at TAIGA experiment

Author: T. I. Gress, A. Chiavassa, E. Popova, Y. Suvorkin, E. A. Osipova, A. V. Skurikhin, Pavel Bezyazeekov, V. Slunecka, B.A. Tarashansky, V. A. Poleschuk, V. S. Ptuskin, V. Vorobyev, L. G. Tkachev, Mihai Popescu, Dieter Horns, D. Voronin, B. K. Lubsandorzhiev, M. Brueckner, Mikhail Panasyuk, D. Zhurov, D. Chernukh, A. Garmash, A. Ivanova, E. A. Kravchenko, E. E. Korosteleva, Y. Sagan, R. P. Kokoulin, N. B. Lubsandorzhiev, Andrey Sokolov, V. V. Lenok, V. Samoliga, L. G. Sveshnikova, A. Krykov, R. Wischnewski, R. Mirzoyan, A. Pushnin, A. Bulan, M. Tluczykont, P. Volchugov, A. L. Pakhorukov, Anatoly Lagutin, Roman Raikin, R. R. Mirgazov, A. Tanaev, O. A. Gress, L. A. Kuzmichev, V. M. Grebenyuk, A. Pan, Oleg Fedorov, V. A. Kozhin, V. V. Kindin, A. Porelli, N. M. Budnev, A. A. Grinyuk, A. Silaev junior, A. Borodin, R. D. Monkhoev, A. Vaidyanathan, K. G. Kompaniets, I. I. Yashin, A. Sidorenkov, O. Grishin, Aleksandr Gafarov, A. N. Dyachok, A. A. Silaev, A. V. Zagorodnikov, Evgeny Postnikov, N. Ushakov, A. A. Petrukhin, L. V. Pankov, Yulia Kazarina, L. M. Ternovoy, Yu. Lemeshev, S. Kiryuhin, V. V. Prosin, I. I. Astapov, Grigory Rubtsov, N. N. Kalmykov, E. Rybov, and V.A. Tabolenko
Subjects: Scintillation, Detector, Scintillation counter, Taiga, Measuring instrument, Environmental science, Cosmic ray, Ultrahigh energy, Instrumentation, Mathematical Physics, Particle detector, Remote sensing
Published: 2020
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28. Baksan large volume scintillation telescope: a current status

Author: A. N. Fazliakhmetov, Nikita Ushakov, E. P. Veretenkin, V. B. Petkov, G. Ya. Novikova, V. Kazalov, A. M. Gangapshev, A. A. Shikhin, D. Yu Kudrin, A. Yu. Sidorenkov, V. V. Kuzminov, E. A. Yanovich, Yu. M. Malyshkin, T. V. Ibragimova, V. N. Gavrin, Dmitry Voronin, B. K. Lubsandorzhiev, and M. M. Kochkarov
Subjects: Physics, History, Scintillation, Physics::Instrumentation and Detectors, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Physics::Geophysics, Computer Science Applications, Education, law.invention, Telescope, Optics, Volume (thermodynamics), law, Current (fluid), business
Abstract: A current status of the project of a large volume scintillation telescope at the Baksan neutrino observatory is presented. The main research activities of the BLVST are low- energy neutrino physics, astrophysics and geophysics. To detect geoneutrinos, large-scale new- generation scintillator detectors located at large depths in the regions with a low background level from nuclear reactors are required. The Baksan Neutrino Observatory is geographically located in one of these places. Recently resumed R&D activities are aimed at the creation of new-generation telescope with a target mass of 10 kt at a depth of 4800 m.w.e. A small scale prototype is already under construction.
Published: 2020
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29. First results from the operation of the prototype Tunka-HiSCORE array

Author: S. F. Berezhnev, N. M. Budnev, M. Büker, M. Brückner, R. Wischnewski, A. V. Gafarov, O. A. Gress, T. Gress, A. N. Dyachok, S. N. Epimakhov, A. V. Zagorodnikov, V. L. Zurbanov, N. N. Kalmykov, N. I. Karpov, E. N. Konstantinov, E. E. Korosteleva, V. A. Kozhin, M. Kunnas, L. A. Kuzmichev, A. Chiavassa, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, R. R. Mirgazov, R. D. Monkhoev, R. Nachtigall, A. L. Pakhorukov, M. I. Panasyuk, L. V. Pankov, A. Porelli, V. A. Poleshchuk, E. G. Popova, V. V. Prosin, V. S. Ptuskin, M. Rueger, G. I. Rubtsov, Yu. A. Semeney, A. A. Silaev, A. V. Skurikhin, L. G. Sveshnikova, M. Tluczykont, D. Hampf, D. Horns, and O. A. Chvalaev
Subjects: Physics, Data processing, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, General Physics and Astronomy, Astronomy, Cosmic ray, Differential spectrum, Observatory, Angle of arrival, Cherenkov radiation, Energy (signal processing), Remote sensing
Abstract: The Tunka-HISCORE wide-angle Cherenkov array, one part of the planned TAIGA integrated gamma observatory intended for investigations in the field of high-energy (>30 TeV) gamma-ray astronomy and cosmic-ray physics, is deployed in the Tunka Valley (Buryat Republic). The first results from operating a prototype array composed of nine stations spread over an area of ∼0.1 square kilometers during the winter of 2013–2014 are presented. Data processing techniques are described, along with data on the accuracy of reconstructing the position of a shower’s axis, energy, and angle of arrival. The differential spectrum of all cosmic-ray particles in a shower in the energy range of 2 × 1014 to 2 × 1016 eV is presented and compared to the available data.
Published: 2015
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30. Energy spectrum and mass composition of cosmic rays, by the data of the Tunka-133 array

Author: S. F. Berezhnev, N. M. Budnev, O. A. Gress, A. N. Dyachok, S. N. Epimakhov, A. V. Zagorodnikov, N. N. Kalmykov, N. I. Karpov, V. A. Kozhin, E. N. Konstantinov, A. V. Korobchenko, E. E. Korosteleva, L. A. Kuzmichev, A. Chiavassa, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, R. R. Mirgazov, R. D. Monkhoev, E. A. Osipova, M. I. Panasyuk, L. V. Pankov, A. L. Pakhorukov, E. G. Popova, V. V. Prosin, V. S. Ptuskin, L. G. Sveshnikova, Yu. A. Semeney, A. A. Silaev, A. V. Skurikhin, O. A. Chvalaev, C. Spiering, and I. V. Yashin
Subjects: Core (optical fiber), Physics, Range (particle radiation), Air shower, Primary energy, General Physics and Astronomy, Direction of arrival, Cosmic ray, Astrophysics, Energy (signal processing), Cherenkov radiation, Computational physics
Abstract: The Tunka-133 Cherenkov light array for the detection of extensive air showers (EAS) acquires data over the five winters from 2009 to 2014. The direction of arrival, the shower core coordinates on the plane of observation, the primary energy, and the depth of the shower maximum are reconstructed for each EAS. A differential all-particle energy spectrum is obtained in the energy range of 6 × 1015–3 × 1018 eV over 1540 h, along with the energy dependence of the average depth of the shower maximum in the range of 6 × 1016–3 × 1018 eV. Based on this dependence, the variation in the average composition of the primary cosmic rays is estimated as a function of energy.
Published: 2015
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31. Cosmic-muon characterization and annual modulation measurement with Double Chooz detectors

Author: I. Gil-Botella, A.V. Etenko, C. Veyssiere, Tobias Lachenmaier, Daniel M. Kaplan, M. Kaneda, T. Miletic, A. Minotti, Michael Wurm, B. Reinhold, B. Svoboda, M. Obolensky, F. Yermia, K. Kale, I. Stancu, T. Hara, Manfred Lindner, Z. Djurcic, Achim Stahl, A. Oralbaev, E. Blucher, E. Chauveau, Masahiro Kuze, V. Sinev, Luis González, Ernesto Kemp, H. Gomez, V. Sibille, C. Lastoria, G. Mention, M. Skorokhvatov, S. Appel, Lydie Giot, J. Jochum, C. Mariani, Cécile Jollet, M. Gögger-Neff, J. M. López-Castaño, S. V. Sukhotin, Christopher Wiebusch, Maury Goodman, Muriel Fallot, Anatael Cabrera, A. Givaudan, P. Chimenti, Masaki Ishitsuka, J. Dhooghe, J. Maeda, T.J.C. Bezerra, G. Pronost, T. Matsubara, H. de Kerret, J. Maricic, J.V. Dawson, D. Franco, O. Corpace, I. M. Pepe, R. Santorelli, D. Navas-Nicolás, J. I. Crespo-Anadón, A. Hourlier, V. Zimmer, M. Cerrada, R. Carr, Y. Sakamoto, J. Busenitz, Stephen Robert Wagner, Eric Baussan, Christian Buck, B. Rybolt, F. Suekane, J. C. dos Anjos, P. Novella, M. Soiron, L.F.F. Stokes, T. Sumiyoshi, J. Haser, D. Lhuillier, A. Tonazzo, D. Kryn, L. Oberauer, I. Bekman, T. Abrahão, G. Yang, M. Vivier, B. K. Lubsandorzhiev, Stefan Schoppmann, Anselmo Meregaglia, M. Franke, Ying Sun, P. Soldin, C. E. Lane, Stefan Schönert, Yasushi Nagasaka, John M. LoSecco, T. Brugière, H. Almazan, P. Kampmann, D. Hellwig, H. P. Lima, T. Laserre, M. Dracos, Matthew L Strait, L. Camilleri, Takeo Kawasaki, C. Palomares, A. Onillon, R. Sharankova, H. Furuta, L. B. Bezrukov, Abrahao, T, Almazan, H, Dos Anjos, J, Appel, S, Baussan, E, Bekman, I, Bezerra, T, Bezrukov, L, Blucher, E, Brugiere, T, Buck, C, Busenitz, J, Cabrera, A, Camilleri, L, Carr, R, Cerrada, M, Chauveau, E, Chimenti, P, Corpace, O, Crespo-Anadon, J, Dawson, J, Dhooghe, J, Djurcic, Z, Dracos, M, Etenko, A, Fallot, M, Franco, D, Franke, M, Furuta, H, Gil-Botella, I, Giot, L, Givaudan, A, Gogger-Neff, M, Gomez, H, Gonzalez, L, Goodman, M, Hara, T, Haser, J, Hellwig, D, Hourlier, A, Ishitsuka, M, Jochum, J, Jollet, C, Kale, K, Kampmann, P, Kaneda, M, Kaplan, D, Kawasaki, T, Kemp, E, De Kerret, H, Kryn, D, Kuze, M, Lachenmaier, T, Lane, C, Laserre, T, Lastoria, C, Lhuillier, D, Lima, H, Lindner, M, Lopez-Castano, J, Losecco, J, Lubsandorzhiev, B, Maeda, J, Mariani, C, Maricic, J, Matsubara, T, Mention, G, Meregaglia, A, Miletic, T, Minotti, A, Nagasaka, Y, Navas-Nicolas, D, Novella, P, Oberauer, L, Obolensky, M, Onillon, A, Oralbaev, A, Palomares, C, Pepe, I, Pronost, G, Reinhold, B, Rybolt, B, Sakamoto, Y, Santorelli, R, Schonert, S, Schoppmann, S, Sharankova, R, Sibille, V, Sinev, V, Skorokhvatov, M, Soiron, M, Soldin, P, Stahl, A, Stancu, I, Stokes, L, Strait, M, Suekane, F, Sukhotin, S, Sumiyoshi, T, Sun, Y, Svoboda, B, Tonazzo, A, Veyssiere, C, Vivier, M, Wagner, S, Wiebusch, C, Wurm, M, Yang, G, Yermia, F, Zimmer, V, Institut Pluridisciplinaire Hubert Curien (IPHC), Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Laboratoire SUBATECH Nantes (SUBATECH), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), APC - Neutrinos, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Double Chooz, Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AstroParticule et Cosmologie (APC (UMR_7164)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris
Subjects: Particle physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, cosmic ray experiment, CHOOZ, 01 natural sciences, Measure (mathematics), High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Modulation (music), ddc:530, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Physics, COSMIC cancer database, Muon, 010308 nuclear & particles physics, Detector, Astronomy and Astrophysics, Instrumentation and Detectors (physics.ins-det), Effective temperature, Neutrino detector, neutrino detector, High Energy Physics::Experiment
Abstract: A study on cosmic muons has been performed for the two identical near and far neutrino detectors of the Double Chooz experiment, placed at $\sim$120 and $\sim$300 m.w.e. underground respectively, including the corresponding simulations using the MUSIC simulation package. This characterization has allowed to measure the muon flux reaching both detectors to be (3.64 $\pm$ 0.04) $\times$ 10$^{-4}$ cm$^{-2}$s$^{-1}$ for the near detector and (7.00 $\pm$ 0.05) $\times$ 10$^{-5}$ cm$^{-2}$s$^{-1}$ for the far one. The seasonal modulation of the signal has also been studied observing a positive correlation with the atmospheric temperature, leading to an effective temperature coefficient of $\alpha_{T}$ = 0.212 $\pm$ 0.024 and 0.355 $\pm$ 0.019 for the near and far detectors respectively. These measurements, in good agreement with expectations based on theoretical models, represent one of the first measurements of this coefficient in shallow depth installations., Comment: 20 pages, 11 figures
Published: 2017
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32. The TAIGA experiment: From cosmic-ray to gamma-ray astronomy in the Tunka valley

Author: A. Haungs, N. B. Lubsandorzhiev, V. Samoliga, Grigory Rubtsov, N. N. Kalmykov, M. Brückner, A Saunkin, E. A. Osipova, D. Voronin, E.G. Popova, Pavel Bezyazeekov, V. Boreyko, O. G. Grishin, R. Hiller, B. K. Lubsandorzhiev, V. A. Poleschuk, A. N. Dyachok, N. V. Gorbunov, N Kirichkov, E. A. Kravchenko, L. Sveshnikova, E. E. Korosteleva, M. Kunnas, N. Karpov, E. Rybov, A. Pakhorukov, R. P. Kokoulin, R. D. Monkhoev, T. I. Gress, E. Fedoseev, A. V. Tkachenko, A. G. Bogdanov, R. Mirzoyan, A. Pushnin, Aleksandr Gafarov, M. Kleifges, R. R. Mirgazov, V.A. Tabolenko, A. Ivanova, Evgeny Postnikov, N. S. Barbashina, V Platonov, A. A. Silaev, A. V. Zagorodnikov, Oleg Fedorov, Y. Kazarina, K. O. Yurin, L. V. Pankov, A. A. Grinyuk, I. I. Astapov, Dmitriy Kostunin, O. A. Gress, V. Zirakashvili, B. A. Tarashchansky, V. A. Kozhin, O. Chvalaev, S.G. Pivovarov, Yu. A. Tikhonov, V. S. Ptuskin, F.G. Schröder, M. Tluczykont, R. Wischnewski, T. Huege, C. Spiering, Andrey Sokolov, N. M. Budnev, I. I. Yashin, A. Barnyakov, Valery Zurbanov, L. G. Tkachev, K. G. Kompaniets, Yu. A. Semeney, V. V. Lenok, A. Porelli, P. Kirilenko, A. V. Skurikhin, L. A. Kuzmichev, V. M. Grebenyuk, R. Nachtigall, Dieter Horns, A. Chiavassa, A. A. Perevalov, A. A. Petrukhin, S. Epimakhov, S. Kiryuhin, V. V. Prosin, and M. I. Panasyuk
Subjects: Nuclear and High Energy Physics, TAIGA, Physics::Instrumentation and Detectors, Cherenkov detector, Astrophysics::High Energy Astrophysical Phenomena, Cosmic ray, IACT, Astrophysics, 01 natural sciences, law.invention, Observatory, law, 0103 physical sciences, 010303 astronomy & astrophysics, Instrumentation, Cherenkov radiation, Physics, Muon, Gamma astronomy, 010308 nuclear & particles physics, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Astronomy, Gamma-ray astronomy
Abstract: We present physical motivations and advantages of the new gamma-observatory TAIGA (Tunka Advanced Instrument for cosmic ray physics and gamma-ray astronomy). TAIGA will be located in the Tunka valley, 50 km to the west of Lake Baikal, at the same place as the integrating air Cherenkov detector for cosmic rays Tunka-133. The TAIGA array is a complex, hybrid detector for ground-based gamma-ray astronomy for energies from a few TeV to several PeV as well as for cosmic ray studies from 100 TeV to several EeV. The array will consist of a wide angle Cherenkov array – TAIGA-HiSCORE with 5km2 area, a net of 16 IACT telescopes (with FOV of about 9.72°×9.72°) as well as muon and other detectors. We present the current status of the array construction.
Published: 2017

33. Measurements of the scintillation decay times of liquid scintillators based on linear alkylbenzene and pseudocumene and developed for neutrino experiments of the next generation

Author: L. B. Bezrukov, B. K. Lubsandorzhiev, E. A. Yanovich, N.B. Lubsandorzhiev, R. V. Poleshchuk, G. Ya. Novikova, and I. R. Barabanov
Subjects: Physics, Scintillation, Linear alkylbenzene, Radioactive source, Time constant, Analytical chemistry, Scintillator, Fluorescence, Nuclear physics, chemistry.chemical_compound, chemistry, Irradiation, Neutrino, Instrumentation
Abstract: The results of studies of the scintillation-light emission kinetics of liquid scintillators, which are based on linear alkylbenzene (LAB) and pseudocumene (PC) with various scintillating fluors under irradiation with γ quanta from a 137Cs radioactive source, are presented. The complex multicomponent character of scintillations that is characterized by the fluorescence time constants τ1 ∼ 2.2–7.0 ns, τ2 ∼ 4.4–14.7 ns, τ3 ∼ 13.8–68.8 ns, and τ4 > 2.2–120.0 ns is demonstrated.
Published: 2013
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34. Extensive studies of MRS APDs for plastic scintillator muon veto detectors of cryogenic experiments

Author: L. B. Bezrukov, B. K. Lubsandorzhiev, B. A. M. Shaibonov, C. Sailer, F. Ritter, K. Freund, R.V. Poleshuk, Josef Jochum, R. Falkenstein, A.V. Golovin, P. Grabmayr, N. B. Lubsandorzhiev, I.N. Polyansky, and V.M. Golovin
Subjects: Physics, Nuclear and High Energy Physics, APDS, Physics::Instrumentation and Detectors, business.industry, Cosmic ray, Scintillator, Avalanche photodiode, Particle detector, Photodiode, law.invention, Nuclear physics, Silicon photomultiplier, Optics, law, Breakdown voltage, business, Instrumentation
Abstract: Low background experiments need active muon veto detectors to shield them from cosmic muons. Plastic scintillator panels with WLS fiber and multi-pixel Geiger-mode avalanche photodiodes readout are widely used in such experiments due to their compactness and robustness. In this paper, results from the study of the basic MRS APD parameters, such as breakdown voltages, quenching resistors, internal gain and dark count rates are presented, as well as temperature dependencies of some of these parameters. In a small fraction of the MRS APDs, some strange dips in the I–V curves just preceding the breakdown voltage point have been observed.
Published: 2012
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35. The Primary CR Spectrum by the Data of the Tunka-133 Array

Author: S. F. Berezhnev, N. M. Budnev, A. Chiavassa, O. A. Chvalaev, O. A. Gress, T. I. Gress, A. N. Dyachok, S. N. Epimakhov, N. I. Karpov, N. N. Kalmykov, E. N. Konstantinov, A. V. Korobchenko, E. E. Korosteleva, V. A. Kozhin, L. A. Kuzmichev, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, R. R. Mirgazov, R. D. Monkhoev, E. A. Osipova, A. L. Pakhorukov, M. I. Panasyuk, L. V. Pankov, E. G. Popova, V. V. Prosin, V. S. Ptuskin, Yu. A. Semeney, A. A. Silaev, A. V. Skurikhin, C. Spiering, L. G. Sveshnikova, and A. V. Zagorodnikov
Subjects: Physics, Data acquisition, Calibration (statistics), Primary (astronomy), Energy spectrum, Astronomy, Astrophysics, Spectrum (topology)
Published: 2016
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36. On Geoneutrinos

Author: L. B. Bezrukov, A. S. Kurlovich, B. K. Lubsandorzhiev, V. V. Sinev, V. P. Zavarzina, and V. P. Morgalyuk
Subjects: 010504 meteorology & atmospheric sciences, 010308 nuclear & particles physics, Physics, QC1-999, 0103 physical sciences, 01 natural sciences, 0105 earth and related environmental sciences
Abstract: Experimental data on geoneutrinos allow to admit that masses of U, Th and K in the Earth can be up to mU = 1.7 · 1017 kg, mTh = 6.7 · 1017 kg and mK/mEarth ~ 2%. These values correspond to intrinsic Earth heat flux in ~300 TW. The most part of this flux goes up in rift zones as a heated gases. Argo Project results and the measurements of the Moon intrinsic heat flux support the existence of such a big flux. So large of U, Th, K abundances were predicted by Adjusted Hydridic Earth model.
Published: 2016

37. Accuracy of time measurements with a QUASAR-370G hybrid vacuum photodetector in Cherenkov detectors of extensive air showers

Author: L. A. Kuzmichev, R. V. Vasiliev, and B. K. Lubsandorzhiev
Subjects: Physics, Observational error, Physics::Instrumentation and Detectors, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Night sky, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Photodetector, Quasar, Photocathode, Amplitude, Optics, Optoelectronics, business, Instrumentation, Cherenkov radiation
Abstract: The accuracy of time measurements in the Cherenkov detectors of extensive air showers, based on QUASAR-370G hybrid vacuum photodetectors with a large-area hemispherical photocathode, is estimated. The dependence of the time measurement error on the amplitude of the output pulses from the photodetector and the light background of the night sky is determined.
Published: 2011
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38. A wide-range time-digital converter

Author: R. V. Poleshchuk and B. K. Lubsandorzhiev
Subjects: Physics, Time-to-digital converter, Differential nonlinearity, Integral nonlinearity, business.industry, Electrical engineering, Range (statistics), Interval (mathematics), business, Integrating ADC, Instrumentation, SINADR, Computer Automated Measurement and Control
Abstract: A time-digital converter is designed for studying events with long delay times between events, which are correlated in time. The measured time interval range is 276 μs, the converter channel width is 67.4 ns, the integral nonlinearity is ≤1%, and the differential nonlinearity is ≤4%. The converter is made in the CAMAC standard.
Published: 2011
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39. Large area photodetectors for astroparticle physics Cherenkov arrays: PMTs vs. HPDs

Author: D. Greiner, Josef Jochum, P. Grabmayr, B. K. Lubsandorzhiev, L. B. Bezrukov, N.B. Lubsandorzhiev, and V. A. Poleshuk
Subjects: Astroparticle physics, Physics, Nuclear physics, Nuclear and High Energy Physics, Optics, business.industry, Photodetector, business, Instrumentation, Cherenkov radiation
Abstract: We review the current status of large area photodetectors for astroparticle physics Cherenkov experiments. Some advantages and disadvantages of classical PMTs and hybrid phototubes are discussed.
Published: 2011
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40. A study of the optical parameters of plastic fiber-optic cables used in calibration systems of astroparticle physics experiments

Author: P. Grabmayr, B. A. M. Shaibonov, N.B. Lubsandorzhiev, Josef Jochum, B. K. Lubsandorzhiev, F. Ritter, and R. V. Vasil'ev
Subjects: Astroparticle physics, Photon, Materials science, Optical fiber, business.industry, Attenuation, Physics::Optics, Plastic fiber, Nanosecond, law.invention, Optics, law, Calibration, Optoelectronics, business, Absorption (electromagnetic radiation), Instrumentation
Abstract: Results of studying the optical properties of plastic fiber-optic cables widely used in astroparticle physics experiments are presented. The absorption of nanosecond light pulses and light dispersion are studied. The influence of mechanical bends of the cables and photon’s launch angles on the transmission time and attenuation of light signals in these cables are also studied.
Published: 2011
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41. How Geoneutrinos can help in understanding of the Earth heat flux

Author: V. P. Morgalyuk, A. S. Kurlovich, L. B. Bezrukov, A. K. Mezhokh, V. Sinev, V. P. Zavarzina, and B. K. Lubsandorzhiev
Subjects: Physics, History, 010308 nuclear & particles physics, Geoneutrino, Astrophysics::High Energy Astrophysical Phenomena, Borehole, Flux, Crust, Mechanics, 01 natural sciences, Physics::Geophysics, Computer Science Applications, Education, Thermal conductivity, Heat flux, 0103 physical sciences, Heat transfer, Astrophysics::Earth and Planetary Astrophysics, 010306 general physics, Earth (classical element)
Abstract: The Hydride Earth model predictions of geoneutrino flux and intrinsic Earth heat flux are discussed. The geoneutrino flux predicted by the model can be adjusted to the experimental one. The predicted intrinsic Earth heat flux is significantly larger than model dependent experimental value obtained under assumption that the main heat transfer mechanism is a thermal conductivity. We introduce an additional mechanism of heat transfer in the Earth's crust, namely the energy transfer by hot gases produced in the Earth crust at great depths. The experimental data supporting this idea, in particular the temperature profiles measured in the Kola super deep borehole, are discussed.
Published: 2017
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42. QUASAR-370 hybrid phototube as a prototype of a photodetector for the next generation of deep underwater neutrino telescopes

Author: B. K. Lubsandorzhiev
Subjects: Astroparticle physics, Physics, Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Neutrino telescope, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy, Photodetector, Quasar, Instrumentation and Detectors (physics.ins-det), Astrophysics, Scintillator, Phototube, Neutrino, Underwater, Instrumentation, Astrophysics::Galaxy Astrophysics
Abstract: In this paper we show that QUASAR-370 large area hybrid phototube developed for and successfully used in a number of astroparticle physics experiments, the lake Baikal deep underwater neutrino experiment among them, could be used as a prototype of a photodetector for the next generation of giant neutrino telescopes., Comment: To be published in NIMA
Published: 2009
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43. Tunka-133: Status 2008 and development of methods for data analysis

Author: N. M. Budnev, R. Wishnevski, O. A. Gress, A. V. Zabolotsky, A. V. Zagorodnikov, N. N. Kalmykov, V. A. Kozhin, E. E. Korosteleva, L. A. Kuzmichev, B. K. Lubsandorzhiev, G. Navarra, R. R. Mirgazov, M. I. Panasyuk, L. V. Pankov, V. V. Prosin, V. S. Ptuskin, Yu. A. Semeney, A. A. Silaev, A. V. Skurikhin, O. A. Chvalaiev, B. A. Shaibonov, Ch. Spierin, and I. V. Yashin
Subjects: Physics, Optics, business.industry, Detector, General Physics and Astronomy, Cosmic ray, business, Cherenkov radiation
Abstract: The activity on creation of a array with an area of 1 km2 for recording extensive air showers using Cherenkov light began in the Tunka valley in 2006. The new array will allow one to study cosmic rays in the energy range 1015–1018 eV by the unified method. In the winter of 2007–2008, the array operated with 4 clusters, 7 detectors in each cluster. Experimental data obtained during 270 h of fair weather in moonless nights demonstrated unique capabilities of the new array, related with the possibility of recording the pulse shape with a step of 5 ns from each detector.
Published: 2009
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44. LED based powerful nanosecond light sources for calibration systems of deep underwater neutrino telescopes

Author: B. A. J. Shaibonov, B. K. Lubsandorzhiev, Y. E. Vyatchin, and R.V. Poleshuk
Subjects: Astroparticle physics, Physics, Nuclear and High Energy Physics, Photon, Physics::Instrumentation and Detectors, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Nanosecond, law.invention, Optics, law, Calibration, Light emission, Underwater, Neutrino, business, Instrumentation, Light-emitting diode
Abstract: Powerful nanosecond light sources based on LEDs have been developed for use in calibration systems of deep underwater neutrino telescopes. The light sources use either matrixes of ultra bright blue InGaN LEDs or new generation high power blue LEDs. It is shown that such light sources have light yield of up to 1010–1012 photons per pulse with very fast light emission kinetics. The developed light sources are currently used in a number of astroparticle physics experiments, namely: the lake Baikal neutrino experiment, the TUNKA EAS experiment, etc.
Published: 2009
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45. Hybrid phototubes in neutrino telescopes: Experience and perspectives

Author: B. K. Lubsandorzhiev
Subjects: Physics, Nuclear and High Energy Physics, Operational principle, Optics, Neutrino detector, business.industry, Photodetector, Astronomy, Neutrino, Underwater, business, Instrumentation
Abstract: In this paper we review hybrid phototubes with luminescent screens used in deep underwater neutrino telescopes. The operational principle and the main characteristics of the phototubes are described. Their advantages and disadvantages are discussed. It is shown that the phototubes suit very well to such kind of application.
Published: 2009
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46. Scintillator counters with multi-pixel avalanche photodiode readout for the ND280 detector of the T2K experiment

Author: M. Taguchi, V. M. Golovin, T. Kutter, Yu.V. Musienko, V. Mayatski, A. O. Izmailov, T. Nobuhara, E. Gushchin, G. B. Bondarenko, Yu. Kudenko, B. K. Lubsandorzhiev, O. V. Mineev, Y. Kurimoto, M. M. Khabibullin, A. N. Khotjantsev, Masashi Yokoyama, Tsuyoshi Nakaya, A. Shaikhiev, N. Yershov, A. Afanasjev, and B.A.J. Shaibonov
Subjects: Physics, Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, business.industry, Detector, T2K experiment, FOS: Physical sciences, Photodetector, Instrumentation and Detectors (physics.ins-det), Scintillator, Avalanche photodiode, law.invention, Optics, Neutrino detector, law, Geiger counter, High Energy Physics::Experiment, Neutrino oscillation, business, Instrumentation
Abstract: The Tokai-to-Kamioka (T2K) experiment is a second generation long baseline neutrino oscillation experiment which aims at a sensitive search for the nu_e appearance. The main design features of the T2K near detectors located at 280 m from the target are presented. Scintillator counters developed for the T2K near detectors are described. Readout of the counters is provided via WLS fibers embedded into S-shape grooves in a scintillator and viewed from both ends by multi-pixel avalanche photodiodes operating in a limited Geiger mode. A desription, operational principles and the results of tests of photosensors with a sensitive area of 1.1 mm^2 are presented. A time resolution of 1.5 ns, a spatial resolution of 9.9-12.4 cm, and a MIP detection efficiency of more than 99% were obtained for scintillator detectors in a beam test., Comment: 23 pages, 20 figures, 2 tables
Published: 2007
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47. The Baikal Neutrino experiment: NT200+ and beyond

Author: K.V. Golubkov, A. A. Pavlov, V. A. Poleschuk, T. I. Gress, V. M. Aynutdinov, V.F. Kulepov, R. Vasiliev, O. G. Grishin, A. V. Shirokov, K.V. Konischev, Yu. A. Semeney, B.A. Tarashansky, V. Rubtzov, A. Kochanov, R. R. Mirgazov, V.A. Balkanov, E.G. Popova, A.P. Koshechkin, S.V. Fialkovsky, E.N. Pliskovsky, O. N. Gaponenko, Ya. Davidov, I. A. Belolaptikov, D. Borschov, A. M. Klabukov, G. Pan'kov, V. A. Zhukov, A. I. Panfilov, M.I. Rozanov, E. A. Osipova, A. I. Klimov, L. V. Pankov, L. B. Bezrukov, N. M. Budnev, B. K. Lubsandorzhiev, D. P. Petukhov, A. A. Doroshenko, A. N. Dyachok, Zh.-A.M. Dzhilkibaev, R. Wischnewski, V. V. Prosin, Ch. Spiering, L. A. Kuzmichev, T. Mikolajski, S. Mikheyev, S. I. Klimushin, P. G. Pokhil, I. A. Danilchenko, B. A. M. Shaibonov, G.V. Domogatsky, M.B. Milenin, O. A. Gress, and I. V. Yashin
Subjects: Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astrophysics, Solar neutrino problem, law.invention, Telescope, Neutrino detector, law, Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, Neutrino astronomy, Neutrino oscillation, Instrumentation
Abstract: The 10 Mton scale Neutrino telescope NT 200 + is operating in Lake Baikal since April, 2005. It's main physics goal is the detection of high energy neutrino cascades in the 10 2 – 10 5 TeV energy range. The NT 200 + sensitivity to astrophysical diffuse neutrinos is four times that of it's predecessor NT200 the telescope that has been operating since 1998, yielding a variety of physics results. A km-scale (Gigaton Volume) Neutrino telescope in Lake Baikal is planned, the R&D phase has started in 2006. We give the basic layout of this Baikal km3-detector, which will be made of building blocks similar to NT 200 + .
Published: 2007
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48. The BAIKAL neutrino experiment: From NT200 to NT200+

Author: E. A. Osipova, B. K. Lubsandorzhiev, P. G. Pokhil, V.F. Kulepov, B.A. Tarashansky, K.V. Konischev, D. Borschov, Yu. A. Semeney, N. M. Budnev, V. A. Poleschuk, I. I. Yashin, B. A. M. Shaibonov, A. A. Doroshenko, V.A. Balkanov, T. Mikolajski, D. P. Petukhov, I. A. Danilchenko, V. M. Aynutdinov, L. V. Pankov, M.B. Milenin, G.V. Domogatsky, A. A. Pavlov, A. I. Panfilov, A. I. Klimov, Zh.-A.M. Dzhilkibaev, M.I. Rozanov, V. V. Prosin, A. N. Dyachok, O. A. Gress, A.P. Koshechkin, Ch. Spiering, E.G. Popova, S. I. Klimushin, O. N. Gaponenko, V. Rubtzov, Ya. Davidov, R. Vasiliev, S.V. Fialkovsky, V. A. Zhukov, K.V. Golubkov, I. A. Belolaptikov, L. B. Bezrukov, E.N. Pliskovsky, A. M. Klabukov, O. G. Grishin, Ralf Wischnewski, L. A. Kuzmichev, S. Mikheyev, A. Kochanov, R. R. Mirgazov, T. I. Gress, A. V. Shirokov, and G. Pan'kov
Subjects: Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy, Solar neutrino problem, Astrophysics, law.invention, Telescope, Neutrino detector, law, Measurements of neutrino speed, ddc:530, High Energy Physics::Experiment, Neutrino, Neutrino astronomy, Neutrino oscillation, Instrumentation
Abstract: The Baikal neutrino telescope NT200 takes data since 1998. In 2005, the deployment of three additional strings for common operation with NT200 was finished. We describe the physics program and the design of the new telescope named NT200+ and present selected physical results obtained with NT200. First results from NT200+ will be presented at the conference., Comment: 4 pages, 5 figures, Proceedings of 29th International Cosmic Ray Conference (ICRC) 2005, Pune, India
Published: 2006
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49. BAIKAL experiment: Main results obtained with the neutrino telescope NT200

Author: A.P. Koshechkin, K.V. Konischev, Yu. A. Semeney, V.A. Balkanov, K.V. Golubkov, V.F. Kulepov, A. I. Panfilov, M.B. Milenin, M.I. Rozanov, S. I. Klimushin, V. Rubtzov, B.A. Tarashansky, G. Pan'kov, P. G. Pokhil, Ya. Davidov, V. A. Poleschuk, I. A. Belolaptikov, S.V. Fialkovsky, D. Borschov, A. A. Pavlov, R. Vasiliev, V. A. Zhukov, L. B. Bezrukov, N. M. Budnev, A. Kochanov, R. R. Mirgazov, D. P. Petukhov, O. N. Gaponenko, A. A. Doroshenko, E.G. Popova, O. A. Gress, E. A. Osipova, I. A. Danilchenko, E.N. Pliskovsky, Zh.-A.M. Dzhilkibaev, A. M. Klabukov, V. V. Prosin, L. A. Kuzmichev, S. Mikheyev, B. K. Lubsandorzhiev, I. I. Yashin, R. Wischnewski, V. M. Aynutdinov, A. N. Dyachok, O. G. Grishin, T. I. Gress, A. I. Klimov, Ch. Spiering, A. V. Shirokov, L. V. Pankov, T. Mikolajski, B. A. M. Shaibonov, and G.V. Domogatsky
Subjects: Physics, Nuclear and High Energy Physics, Solar neutrino, Astrophysics (astro-ph), Neutrino telescope, FOS: Physical sciences, Astronomy, Astrophysics, Solar neutrino problem, Particle detector, Neutrino detector, ddc:530, Neutrino astronomy, Neutrino, Instrumentation, Lepton
Abstract: The Baikal Neutrino Telescope NT200 takes data since April 1998. On April 9th, 2005, the 10 Mton scale detector NT200$+$ was put into operation in Lake Baikal. Selected results obtained during 1998-2002 with the neutrino telescope NT200 are presented., 6 pages, 7 figures, presented at 2nd VLVNT Workshop on Very Large Volume Neutrino Telescope (VLVNT2), Catania, Italy, 8-11 Nov. 2005
Published: 2006
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50. Development of a hybrid phototube with ZnO:Ga luminescent screen and GaN photocathode

Author: J. Nause, L.M. Balyasny, Josef Jochum, V. Rengarajan, N.B. Lubsandorzhiev, S.A. Belyanchenko, B. K. Lubsandorzhiev, L. B. Bezrukov, R. Falkenstein, B. Nemeth, Sergei Ivanovich Dolinsky, V. Poleshchuk, and P. Grabmayr
Subjects: Physics, Nuclear and High Energy Physics, business.industry, Photodetector, Phosphor, Scintillator, Cathode, Photocathode, law.invention, Phototube, Crystal, law, Optoelectronics, business, Luminescence, Instrumentation
Abstract: We present results of the development of a hybrid phototube with luminescent screen based on a fast ZnO:Ga scintillator crystal.
Published: 2012
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