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1. High-Energy Neutrino Follow-up at the Baikal-GVD Neutrino Telescope

Author

Z. Bardačová, T. I. Gress, M. S. Katulin, K. V. Konishchev, K.V. Golubkov, Lukas Fajt, Mark Shelepov, E. V. Ryabov, A. V. Skurikhin, M.M. Kolbin, W. Noga, B. A. Tarashchansky, V. A. Kozhin, D. N. Zaborov, A.P. Koshechkin, T. V. Elzhov, V. Ya. Dik, G.B. Safronov, A.V. Avrorin, Aleksandr Gafarov, E.N. Pliskovsky, O.G. Kebkal, V.D. Rushay, M.I. Rozanov, A. A. Doroshenko, Zh.-A.M. Dzhilkibaev, R. R. Mirgazov, A.G. Solovjev, V. Nazari, V. B. Brudanin, V.F. Kulepov, N. M. Budnev, S. V. Fialkovski, E.V. Khramov, Fedor Šimkovic, D. P. Petukhov, V. M. Aynutdinov, Yu. V. Yablokova, Sergey Yakovlev, K. A. Kopański, N.S. Gorshkov, R. Bannasch, E. O. Sushenok, R. Dvornicky, A.V. Korobchenko, I. A. Belolaptikov, Konstantin Kebkal, I. Stekl, R. Ivanov, V.A. Tabolenko, Dmitry V. Naumov, A.D. Avrorin, G.V. Domogatsky, B.A. Shaybonov, A. N. Dyachok, E. Eckerová, Olga Suvorova, M.K. Kryukov, M. V. Milenin, M.N. Sorokovikov, and M.V. Kruglov

Subjects
Physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Detector, Neutrino telescope, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astronomy and Astrophysics, 01 natural sciences, Monitoring program, law.invention, Telescope, Data acquisition, Space and Planetary Science, law, 0103 physical sciences, Neutrino, Underwater, 010303 astronomy & astrophysics, Event reconstruction
Abstract

The Baikal-GVD deep underwater neutrino experiment participates in the international multi-messenger program to detect the astrophysical sources of high- and ultrahigh-energy cosmic-ray particles, being at the stage of array deployment and a step-by-step increase of the telescope’s effective volume to the scale of a cubic kilometer. At present, the telescope consists of seven clusters containing 2016 photodetectors. The effective volume of the detector has reached 0.35 km $${}^{3}$$ for the selection of shower events from neutrino interactions in Baikal water. The experimental data have been accumulated in a continuous exposure mode since 2015, allowing a prompt data analysis and a celestial-sphere monitoring program to be implemented in real time. We discuss the structure of the data acquisition system, describe the physical event reconstruction procedure in the mode of fast response to alerts, and present the results of our analysis of nine alerts from the polar IceCube telescope from early September to late October 2020.

Published
2021

2. Neutrino Telescope in Lake Baikal: Present and Nearest Future

Author

M.B. Milenin, Ivan Štekl, V. Y. Dik, I. A. Belolaptikov, V. A. Kozhin, V.D. Rushay, V. Nazari, Mark Shelepov, V. B. Brudanin, V.F. Kulepov, I. V. Borina, D. N. Zaborov, O.G. Kebkal, A. P. Stromakov, M.I. Rozanov, A.P. Koshechkin, B.A. Tarashansky, Yury Malyshkin, A. E. Sirenko, A. A. Doroshenko, A.G. Solovjev, Zh.-A.M. Dzhilkibaev, Z. Bardаčová, Aleksandr Gafarov, K.V. Golubkov, M.V. Kruglov, А. D. Avrorin, K.V. Konischev, Pa. Malecki, B.A. Shaybonov, Evgeniy Khramov, A. V. Skurikhin, M.N. Sorokovikov, T. V. Elzhov, A. N. Dyachok, V.A. Tabolenko, Konstantin Kebkal, W. Noga, T. I. Gress, Lukas Fajt, G.B. Safronov, A.V. Korobchenko, R. R. Mirgazov, E. V. Ryabov, Rastislav Dvornický, N. M. Budnev, E. Eckerová, M.M. Kolbin, A.V. Avrorin, E.N. Pliskovsky, Olga Suvorova, D. P. Petukhov, G.V. Domogatsky, M. S. Katulin, V. M. Aynutdinov, K. A. Kopański, Sergey Yakovlev, M.K. Kryukov, Dmitry V. Naumov, V. A. Allakhverdyan, Fedor Šimkovic, N.S. Gorshkov, Y. V. Yablokova, R. Bannasch, S.V. Fialkovsky, and E. O. Sushenok

Subjects
Physics, Neutrino telescope, Astronomy
Published
2021

3. Observations of track-like neutrino events with Baikal-GVD

Author

Dmitry Zaborov, V.A. Allakhverdyan, A.D. Avrorin, A.V. Avrorin, V.M. Aynutdinov, R. Bannasch, Zuzana Bardačová, I.A. Belolaptikov, I.V. Borina, V.B. Brudanin, N.M. Budnev, V.Y. Dik, G.V. Domogatsky, A.A. Doroshenko, Rastislav Dvornicky, A.N. Dyachok, Zh.-A.M. Dzhilkibaev, Eliška Eckerová, T.V. Elzhov, L. Fajt, Stanislav Vasilevich Fialkovsky, A.R. Gafarov, K.V. Golubkov, N.S. Gorshkov, T.I. Gress, M.S. Katulin, K.G. Kebkal, O.G. Kebkal, E.V. Khramov, M.M. Kolbin, K.V. Konischev, K.A. Kopański, A.V. Korobchenko, A.P. Koshechkin, V.A. Kozhin, M.V. Kruglov, M.K. Kryukov, V.F. Kulepov, Pa. Malecki, Y.M. Malyshkin, M.B. Milenin, R.R. Mirgazov, D.V. Naumov, V. Nazari, W. Noga, D.P. Petukhov, E.N. Pliskovsky, M.I. Rozanov, V.D. Rushay, E.V. Ryabov, G.B. Safronov, B.A. Shaybonov, M.D. Shelepov, Fedor Šimkovic, A.E. Sirenko, A.V. Skurikhin, A.G. Solovjev, M.N. Sorokovikov, Ivan Štekl, A.P. Stromakov, E.O. Sushenok, O.V. Suvorova, V.A. Tabolenko, B.A. Tarashansky, Y.V. Yablokova, and S.A. Yakovlev

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Muon, Physics::Instrumentation and Detectors, Track (disk drive), Astrophysics::High Energy Astrophysical Phenomena, Detector, Monte Carlo method, FOS: Physical sciences, Flux, Reconstruction algorithm, Nuclear physics, Neutrino detector, High Energy Physics::Experiment, Neutrino, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract

The Baikal Gigaton Volume Detector (Baikal-GVD) is a km$^3$-scale neutrino detector currently under construction in Lake Baikal, Russia. The detector currently consists of 2304 optical modules arranged on 64 vertical strings. Further extension of the array is planned for March 2022. The data from the partially complete array have been analyzed using a $\chi^2$-based track reconstruction algorithm. After suppression of the downward-going atmospheric muon background, a flux of upward-going neutrino events is observed, dominated by the atmospheric neutrinos. The observed flux is in good agreement with Monte Carlo predictions., Comment: 8 pages, 5 figures, to be published in Proceedings of the 37th International Cosmic Ray Conference (ICRC-2021), 12-23 July 2021

Published
2021

4. Positioning system for Baikal-GVD

Author

A. A. Doroshenko, K.V. Konischev, Zh.-A.M. Dzhilkibaev, N.S. Gorshkov, Dmitry V. Naumov, B.A. Shaybonov, M.B. Milenin, D. N. Zaborov, Fedor Šimkovic, A.P. Koshechkin, A. E. Sirenko, A. P. Stromakov, A. N. Dyachok, Y. V. Yablokova, G.B. Safronov, A. V. Skurikhin, N. M. Budnev, Rastislav Dvornický, Evgeniy Khramov, I. A. Belolaptikov, R. R. Mirgazov, A.V. Avrorin, V.D. Rushay, B.A. Tarashansky, D. P. Petukhov, Konstantin Kebkal, W. Noga, V. A. Kozhin, V. A. Allakhverdyan, K. A. Kopański, Yury Malyshkin, E. Eckerová, V. Nazari, Olga Suvorova, V. Y. Dik, E.N. Pliskovsky, Mark Shelepov, O.G. Kebkal, M.I. Rozanov, I. V. Borina, M.V. Kruglov, S.V. Fialkovski, R. Bannasch, E. O. Sushenok, A.G. Solovjev, Pa. Malecki, I. Stekl, M.K. Kryukov, V.A. Tabolenko, T. I. Gress, Lukas Fajt, K.V. Golubkov, E. V. Ryabov, M.M. Kolbin, M.N. Sorokovikov, T. V. Elzhov, V. M. Aynutdinov, Sergey Yakovlev, A.V. Korobchenko, A.D. Avrorin, G.V. Domogatsky, V. B. Brudanin, V.F. Kulepov, Aleksandr Gafarov, M. S. Katulin, and Z. Bardačová

Subjects
Photomultiplier, Physics - Instrumentation and Detectors, Positioning system, Neutrino telescope, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), law.invention, Telescope, Upgrade, law, Acoustic modem, Polling, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Trilateration, Geology, Remote sensing
Abstract

Baikal-GVD is a kilometer scale neutrino telescope currently under construction in Lake Baikal. Due to water currents in Lake Baikal, individual photomultiplier housings are mobile and can drift away from their initial position. In order to accurately determine the coordinates of the photomultipliers, the telescope is equipped with an acoustic positioning system. The system consists of a network of acoustic modems, installed along the telescope strings and uses acoustic trilateration to determine the coordinates of individual modems. This contribution discusses the current state of the positioning in Baikal-GVD, including the recent upgrade to the acoustic modem polling algorithm., Presented at 37th International Cosmic Ray Conference (ICRC 2021)

Published
2021

5. Experimental string with fiber optic data acquisition for Baikal-GVD

Author

Vladimir Aynutdinov, A. Allakhverdyan, A.D. Avrorin, A.V. Avrorin, R. Bannasch, Z. Bardаčová, I.A. Belolaptikov, I.V. Borina, V.B. Brudanin, N.M. Budnev, V.Y. Dik, G.V. Domogatsky, A.A. Doroshenko, Rastislav Dvornicky, A.N. Dyachok, Zh.-A.M. Dzhilkibaev, Eliška Eckerová, T.V. Elzhov, L. Fajt, Stanislav Vasilevich Fialkovsky, A.R. Gafarov, K.V. Golubkov, N.S. Gorshkov, T.I. Gress, M.S. Katulin, K.G. Kebkal, O.G. Kebkal, E.V. Khramov, M.M. Kolbin, K.V. Konischev, K.A. Kopanski, A.V. Korobchenko, A.P. Koshechkin, V.A. Kozhin, M.V. Kruglov, M.K. Kryukov, V.F. Kulepov, Pa. Malecki, Y.M. Malyshkin, M.B. Milenin, R.R. Mirgazov, D.V. Naumov, V. Nazari, W. Noga, D.P. Petukhov, E.N. Pliskovsky, M.I. Rozanov, V.D. Rushay, E.V. Ryabov, G.B. Safronov, B.A. Shaybonov, M.D. Shelepov, Fedor Šimkovic, A.E. Sirenko, A.V. Skurikhin, A.G. Solovjev, M.N. Sorokovikov, Ivan Štekl, A.P. Stromakov, E.O. Sushenok, O.V. Suvorova, V.A. Tabolenko, B.A. Tarashansky, Y.V. Yablokova, S.A. Yakovlev, and D.N. Zaborov

Published
2021

6. Performance of the muon track reconstruction with the Baikal-GVD neutrino telescope

Author

Grigory Safronov, V.A. Allakhverdyan, A.D. Avrorin, A.V. Avrorin, V.M. Aynutdinov, R. Bannasch, Zuzana Bardačová, I.A. Belolaptikov, V.B. Brudanin, N.M. Budnev, V.Y. Dik, G.V. Domogatsky, A.A. Doroshenko, Rastislav Dvornicky, A.N. Dyachok, Zh.-A.M. Dzhilkibaev, Eliška Eckerová, T.V. Elzhov, L. Fajt, Stanislav Vasilevich Fialkovsky, A.R. Gafarov, K.V. Golubkov, N.S. Gorshkov, T.I. Gress, M.S. Katulin, K.G. Kebkal, O.G. Kebkal, E.V. Khramov, M.M. Kolbin, K.V. Konischev, K.A. Kopański, A.V. Korobchenko, A.P. Koshechkin, V.A. Kozhin, M.V. Kruglov, M.K. Kryukov, V.F. Kulepov, Pa. Malecki, Y.M. Malyshkin, M.B. Milenin, R.R. Mirgazov, D.V. Naumov, V. Nazari, W. Noga, D.P. Petukhov, E.N. Pliskovsky, M.I. Rozanov, V.D. Rushay, E.V. Ryabov, B.A. Shaybonov, M.D. Shelepov, Fedor Šimkovic, A.E. Sirenko, A.V. Skurikhin, A.G. Solovjev, M.N. Sorokovikov, Ivan Štekl, A.P. Stromakov, E.O. Sushenok, O.V. Suvorova, V.A. Tabolenko, B.A. Tarashansky, Y.V. Yablokova, S.A. Yakovlev, and D.N. Zaborov

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Particle physics, Muon, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Track (disk drive), Monte Carlo method, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Classifier (linguistics), High Energy Physics::Experiment, Gradient boosting, Neutrino, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Selection (genetic algorithm)
Abstract

Baikal-GVD is a km$^3$-scale neutrino telescope being constructed in Lake Baikal. Muon and partially tau (anti)neutrino interactions near the detector through the W$^{\pm}$-boson exchange are accompanied by muon tracks. Reconstructed direction of the track is arguably the most precise probe of the neutrino direction attainable in Cerenkov neutrino telescopes. Muon reconstruction techniques adopted by Baikal-GVD are discussed in the present report. Performance of the muon reconstruction is studied using realistic Monte Carlo simulation of the detector. The algorithms are applied to real data from Baikal-GVD and the results are compared with simulations. The performance of the neutrino selection based on a boosted decision tree classifier is discussed., 8 pages, 5 figures. Poster presented at 37th International Cosmic Ray Conference (ICRC 2021), July 12th - 23rd, 2021, Online - Berlin, Germany. PoS(ICRC2021)1080

Published
2021

7. Time synchronization of Baikal-GVD clusters

Author

Vladimir Aynutdinov, V.A. Allakhverdyan, A.D. Avrorin, A.V. Avrorin, R. Bannasch, Z. Bardаčová, I.A. Belolaptikov, I.V. Borina, V.B. Brudanin, N.M. Budnev, V.Y. Dik, G.V. Domogatsky, A.A. Doroshenko, Rastislav Dvornicky, A.N. Dyachok, Zh.-A.M. Dzhilkibaev, Eliška Eckerová, T.V. Elzhov, L. Fajt, Stanislav Vasilevich Fialkovsky, A.R. Gafarov, K.V. Golubkov, N.S. Gorshkov, T.I. Gress, M.S. Katulin, K.G. Kebkal, O.G. Kebkal, E.V. Khramov, M.M. Kolbin, K.V. Konischev, K.A. Kopanski, A.V. Korobchenko, A.P. Koshechkin, V.A. Kozhin, M.V. Kruglov, M.K. Kryukov, V.F. Kulepov, Pa. Malecki, Y.M. Malyshkin, M.B. Milenin, R.R. Mirgazov, D.V. Naumov, V. Nazari, W. Noga, D.P. Petukhov, E.N. Pliskovsky, M.I. Rozanov, V.D. Rushay, E.V. Ryabov, G.B. Safronov, B.A. Shaybonov, M.D. Shelepov, Fedor Šimkovic, A.E. Sirenko, A.V. Skurikhin, A.G. Solovjev, M.N. Sorokovikov, Ivan Štekl, A.P. Stromakov, E.O. Sushenok, O.V. Suvorova, V.A. Tabolenko, B.A. Tarashansky, Y.V. Yablokova, S.A. Yakovlev, and D.N. Zaborov

Published
2021

8. The Baikal-GVD neutrino telescope: search for high-energy cascades

Author

Zhan-Arys Magysovich Dzhilkibaev, V.A. Allakhverdyan, А.D. Avrorin, A.V. Avrorin, V.M. Aynutdinov, R. Bannasch, Z. Bardаčová, I.A. Belolaptikov, I.V. Borina, V.B. Brudanin, N.M. Budnev, V.Y. Dik, G.V. Domogatsky, A.A. Doroshenko, Rastislav Dvornicky, A.N. Dyachok, Zh.-A.M. Dzhilkibaev, Eliška Eckerová, T.V. Elzhov, L. Fajt, Stanislav Vasilevich Fialkovsky, A.R. Gafarov, K.V. Golubkov, N.S. Gorshkov, T.I. Gress, M.S. Katulin, K.G. Kebkal, O.G. Kebkal, E.V. Khramov, M.M. Kolbin, K.V. Konischev, K.A. Kopański, A.V. Korobchenko, A.P. Koshechkin, V.A. Kozhin, M.V. Kruglov, M.K. Kryukov, V.F. Kulepov, Pa. Malecki, Y.M. Malyshkin, M.B. Milenin, R.R. Mirgazov, D.V. Naumov, V. Nazari, W. Noga, D.P. Petukhov, E.N. Pliskovsky, M.I. Rozanov, V.D. Rushay, E.V. Ryabov, G.B. Safronov, B.A. Shaybonov, M.D. Shelepov, Fedor Šimkovic, A.E. Sirenko, A.V. Skurikhin, A.G. Solovjev, M.N. Sorokovikov, Ivan Štekl, A.P. Stromakov, E.O. Sushenok, O.V. Suvorova, V.A. Tabolenko, B.A. Tarashansky, Y.V. Yablokova, S.А. Yakovlev, D.N. Zaborov, Yu.A. Kovalev, Yu.Yu. Kovalev, A.V. Plavin, S.V. Troitsky, A.K. Erkenov, T.V. Mufakharov, Yu.V. Sotnikova, T. Hovatta, S. Kiehlmann, and A.C.S. Readhead

Published
2021

9. Follow up of the IceCube alerts with the Baikal-GVD telescope

Author

V.Y. Dik, V.A. Allakhverdyan, A.D. Avrorin, A.V. Avrorin, V.M. Aynutdinov, R. Bannasch, Z. Bardačová, I.A. Belolaptikov, I.V. Borina, V.B. Brudanin, N.M. Budnev, G.V. Domogatsky, A.A. Doroshenko, R. Dvornický, A.N. Dyachok, Zh.-A.M. Dzhilkibaev, E. Eckerová, T.V. Elzhov, L. Fajt, S.V. Fialkovski, A.R. Gafarov, K.V. Golubkov, N.S. Gorshkov, T.I. Gress, M.S. Katulin, K.G. Kebkal, O.G. Kebkal, E.V. Khramov, M.M. Kolbin, K.V. Konischev, K.A. Kopański, A.V. Korobchenko, A.P. Koshechkin, V.A. Kozhin, M.V. Kruglov, M.K. Kryukov, V.F. Kulepov, Pa. Malecki, Y.M. Malyshkin, M.B. Milenin, R.R. Mirgazov, D.V. Naumov, V. Nazari, W. Noga, D.P. Petukhov, E.N. Pliskovsky, M.I. Rozanov, V.D. Rushay, E.V. Ryabov, G.B. Safronov, B.A. Shaybonov, M.D. Shelepov, F. Šimkovic, A.E. Sirenko, A.V. Skurikhin, A.G. Solovjev, M.N. Sorokovikov, I. Štekl, A.P. Stromakov, E.O. Sushenok, O.V. Suvorova, V.A. Tabolenko, B.A. Tarashansky, Y.V. Yablokova, S.A. Yakovlev, and D.N. Zaborov

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, High Energy Physics::Experiment, Astrophysics - High Energy Astrophysical Phenomena, Instrumentation, Mathematical Physics
Abstract

The high-energy muon neutrino events of the IceCube telescope, that are triggered as neutrino alerts in one of two probability ranks of astrophysical origin, "gold" and "bronze", have been followed up by the Baikal-GVD in a fast quasi-online mode since September 2020. Search for correlations between alerts and GVD events reconstructed in two modes, muon-track and cascades (electromagnetic or hadronic showers), for the time windows $ \pm $ 1 h and $ \pm $ 12 h does not indicate statistically significant excess of the measured events over the expected number of background events. Upper limits on the neutrino fluence will be presented for each alert., Comment: 5 pages, 5 figures, Proceedings for the VLVnT 2021 conference, submitted to JINST

Published
2021
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10. Multi-messenger and real-time astrophysics with the Baikal-GVD telescope

Author

K.V. Konischev, K.V. Golubkov, B.A. Tarashansky, Y. V. Yablokova, A. E. Sirenko, V. B. Brudanin, V.F. Kulepov, Z. Bardаčová, V. Nazari, V. Y. Dik, V.D. Rushay, N. M. Budnev, V. A. Allakhverdyan, T. V. Elzhov, Aleksandr Gafarov, R. R. Mirgazov, D. P. Petukhov, A.V. Korobchenko, Mark Shelepov, D. N. Zaborov, A.P. Koshechkin, A.V. Avrorin, A.D. Avrorin, G.B. Safronov, K. A. Kopański, M.V. Kruglov, Fedor Šimkovic, I. Stekl, S.V. Fialkovski, V.A. Tabolenko, Rastislav Dvornický, G.V. Domogatsky, E.N. Pliskovsky, A. A. Doroshenko, E. Eckerová, R. Bannasch, Zh.-A.M. Dzhilkibaev, E. O. Sushenok, Pa. Malecki, Yury Malyshkin, A. P. Stromakov, A. V. Skurikhin, Olga Suvorova, W. Noga, O.G. Kebkal, T. I. Gress, M.I. Rozanov, M.K. Kryukov, A.G. Solovjev, Lukas Fajt, M.N. Sorokovikov, B.A. Shaybonov, A. N. Dyachok, E. V. Ryabov, M.M. Kolbin, M. S. Katulin, V. M. Aynutdinov, Sergey Yakovlev, I. V. Borina, V. A. Kozhin, M.B. Milenin, N.S. Gorshkov, Evgeniy Khramov, I. A. Belolaptikov, Konstantin Kebkal, and Dmitry V. Naumov

Subjects
Physics, High Energy Astrophysical Phenomena (astro-ph.HE), COSMIC cancer database, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Celestial sphere, Astrophysics, Magnetar, law.invention, Telescope, Cascade, law, Muon neutrino, High Energy Physics::Experiment, Neutrino, Gamma-ray burst, Astrophysics - High Energy Astrophysical Phenomena
Abstract

The Baikal-GVD deep underwater neutrino experiment participates in the international multi-messenger program on discovering the astrophysical sources of high energy fluxes of cosmic particles, while being at the stage of deployment with a gradual increase of its effective volume to the scale of a cubic kilometer. In April 2021 the effective volume of the detector has been reached 0.4 km3 for cascade events with energy above 100 TeV generated by neutrino interactions in Lake Baikal. The alarm system in real-time monitoring of the celestial sphere was launched at the beginning of 2021, that allows to form the alerts of two ranks like "muon neutrino" and "VHE cascade". Recent results of fast follow-up searches for coincidences of Baikal-GVD high energy cascades with ANTARES/TAToO high energy neutrino alerts and IceCube GCN messages will be presented, as well as preliminary results of searches for high energy neutrinos in coincidence with the magnetar SGR 1935+2154 activity in period of radio and gamma burst in 2020., Comment: Submitted to Proc. of the 37th International Cosmic Ray Conference (ICRC 2021), PoS-0946, July 12th -- 23rd, 2021, Online -- Berlin, Germany. 8 pages, 5 figures

Published
2021
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11. Baikal-GVD: status and first results

Author

Grigory Safronov, A.D. Avrorin, A.V. Avrorin, V.M. Aynutdinov, Z. Bardáčová, R. Bannasch, I.A. Belolaptikov, V.B. Brudanin, N.M. Budnev, G.V. Domogatsky, E. Eckerová, T.V. Elzhov, L. Fajt, S.V. Fialkovski, A.R. Gafarov, K.V. Golubkov, N.S. Gorshkov, T.I. Gress, R.A. Ivanov, M.S. Katulin, K.G. Kebkal, O.G. Kebkal, E.V. Khramov, M.M. Kolbin, K.V. Konischev, K.A. Kopański, A.V. Korobchenko, A.P. Koshechkin, V.A. Kozhin, M.K. Kryukov, M.V. Kruglov, V.F. Kulepov, M.B. Milenin, R.R. Mirgazov, D.V. Naumov, V. Nazari, W. Noga, D.P. Petukhov, E.N. Pliskovsky, M.I. Rozanov, V.D. Rushay, E.V. Ryabov, G.B. Safronov, B.A. Shaybonov, M.D. Shelepov, F. Šimkovic, A.V. Skurikhin, A.G. Solovjev, M.N. Sorokovikov, I. Štekl, E.O. Sushenok, O.V. Suvorova, V.A. Tabolenko, B.A. Tarashansky, Y.V. Yablokova, S. Yakovlev, and D.N. Zaborov𝑎

Published
2020

12. Technique for suppression of background cascades produced by atmospheric muon bundles in the Baikal-GVD

Author

V.A. Allakhverdyan, A.D. Avrorin, A.V. Avrorin, V.M. Aynutdinov, R. Bannasch, Z. Bardačová, I.A. Belolaptikov, I.V. Borina, V.B. Brudanin, N.M. Budnev, V.Y. Dik, G.V. Domogatsky, A.A. Doroshenko, R. Dvornický, A.N. Dyachok, Zh.-A.M. Dzhilkibaev, E. Eckerová, T.V. Elzhov, L. Fajt, S.V. Fialkovski, A.R. Gafarov, K.V. Golubkov, N.S. Gorshkov, T.I. Gress, M.S. Katulin, K.G. Kebkal, O.G. Kebkal, E.V. Khramov, M.M. Kolbin, K.V. Konischev, K.A. Kopański, A.V. Korobchenko, A.P. Koshechkin, V.A. Kozhin, M.V. Kruglov, M.K. Kryukov, V.F. Kulepov, Pa. Malecki, Y.M. Malyshkin, M.B. Milenin, R.R. Mirgazov, D.V. Naumov, V. Nazari, W. Noga, D.P. Petukhov, E.N. Pliskovsky, M.I. Rozanov, V.D. Rushay, E.V. Ryabov, G.B. Safronov, B.A. Shaybonov, M.D. Shelepov, F. Šimkovic, A.E. Sirenko, A.V. Skurikhin, A.G. Solovjev, M.N. Sorokovikov, I. Štekl, A.P. Stromakov, E.O. Sushenok, O.V. Suvorova, V.A. Tabolenko, B.A. Tarashansky, Y.V. Yablokova, S.A. Yakovlev, and D.N. Zaborov

Subjects
Physics::Instrumentation and Detectors, Instrumentation, Mathematical Physics
Abstract

Baikal-GVD (Gigaton Volume Detector) is a neutrino telescope located in pure water of Lake Baikal. At the current stage (season 2021), detector is composed of 2304 optical modules arranged in 8 clusters. In searching for neutrino cascade events, light patterns produced via discrete stochastic energy losses along muon tracks create the most abundant background. Methods to separate cascade-like events from tracks and neutrino cascades in a single cluster have been developed and optimized. One of the method tries to find the maximum number of track hits amongst cascade hits, which are present in the muon bundle event. Other ones rely on the distributions of charges and positions of hits on optical modules associated with cascade events. All suppression methods were optimized by the Monte Carlo simulation datasets.

Published
2022

13. Method and portable bench for tests of the laser optical calibration system components for the Baikal-GVD underwater neutrino Cherenkov telescope

Author

V.A. Allakhverdyan, A.D. Avrorin, A.V. Avrorin, V.M. Aynutdinov, R. Bannasch, Z. Bardačová, I.A. Belolaptikov, I.V. Borina, V.B. Brudanin, N.M. Budnev, V.Y. Dik, G.V. Domogatsky, A.A. Doroshenko, R. Dvornický, A.N. Dyachok, Zh.-A.M. Dzhilkibaev, E. Eckerová, T.V. Elzhov, L. Fajt, S.V. Fialkovski, A.R. Gafarov, K.V. Golubkov, N.S. Gorshkov, T.I. Gress, M.S. Katulin, K.G. Kebkal, O.G. Kebkal, E.V. Khramov, M.M. Kolbin, K.V. Konischev, K.A. Kopański, A.V. Korobchenko, A.P. Koshechkin, V.A. Kozhin, M.V. Kruglov, M.K. Kryukov, V.F. Kulepov, Pa. Malecki, Y.M. Malyshkin, M.B. Milenin, R.R. Mirgazov, D.V. Naumov, V. Nazari, W. Noga, D.P. Petukhov, E.N. Pliskovsky, M.I. Rozanov, V.D. Rushay, E.V. Ryabov, G.B. Safronov, B.A. Shaybonov, M.D. Shelepov, F. Šimkovic, A.E. Sirenko, A.V. Skurikhin, A.G. Solovjev, M.N. Sorokovikov, I. Štekl, A.P. Stromakov, E.O. Sushenok, O.V. Suvorova, V.A. Tabolenko, B.A. Tarashansky, Y.V. Yablokova, S.A. Yakovlev, and D.N. Zaborov

Subjects
Physics - Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Instrumentation, Mathematical Physics
Abstract

The large-scale deep underwater Cherenkov neutrino telescopes like Baikal-GVD, ANTARES or KM3NeT, require calibration and testing methods of their optical modules. These methods usually include laser-based systems which allow to check the telescope responses to the light and for real-time monitoring of the optical parameters of water such as absorption and scattering lengths, which show seasonal changes in natural reservoirs of water. We will present a testing method of a laser calibration system and a set of dedicated tools developed for Baikal- GVD, which includes a specially designed and built, compact, portable, and reconfigurable scanning station. This station is adapted to perform fast quality tests of the underwater laser sets just before their deployment in the telescope structure, even on ice, without darkroom. The testing procedure includes the energy stability test of the laser device, 3D scan of the light emission from the diffuser and attenuation test of the optical elements of the laser calibration system. The test bench consists primarily of an automatic mechanical scanner with a movable Si detector, beam splitter with a reference Si detector and, optionally, Q-switched diode-pumped solid-state laser used for laboratory scans of the diffusers. The presented test bench enables a three-dimensional scan of the light emission from diffusers, which are designed to obtain the isotropic distribution of photons around the point of emission. The results of the measurement can be easily shown on a 3D plot immediately after the test and may be also implemented to a dedicated program simulating photons propagation in water, which allows to check the quality of the diffuser in the scale of the Baikal-GVD telescope geometry., Comment: Presented at the VLVnT - Very Large Volume Neutrino Telescope Workshop, Valencia, 18-21 May 2021

Published
2021

14. Luminescence of Baikal water as a dynamic background of the Baikal-GVD Neutrino Telescope

Author

V.A. Allakhverdyan, A.D. Avrorin, A.V. Avrorin, V.M. Aynutdinov, R. Bannasch, Z. Bardačová, I.A. Belolaptikov, I.V. Borina, V.B. Brudanin, N.M. Budnev, V.Y. Dik, G.V. Domogatsky, A.A. Doroshenko, R. Dvornický, A.N. Dyachok, Zh.-A.M. Dzhilkibaev, E. Eckerová, T.V. Elzhov, L. Fajt, S.V. Fialkovski, A.R. Gafarov, K.V. Golubkov, N.S. Gorshkov, T.I. Gress, M.S. Katulin, K.G. Kebkal, O.G. Kebkal, E.V. Khramov, M.M. Kolbin, K.V. Konischev, K.A. Kopański, A.V. Korobchenko, A.P. Koshechkin, V.A. Kozhin, M.V. Kruglov, M.K. Kryukov, V.F. Kulepov, Pa. Malecki, Y.M. Malyshkin, M.B. Milenin, R.R. Mirgazov, D.V. Naumov, V. Nazari, W. Noga, D.P. Petukhov, E.N. Pliskovsky, M.I. Rozanov, V.D. Rushay, E.V. Ryabov, G.B. Safronov, B.A. Shaybonov, M.D. Shelepov, F. Šimkovic, A.E. Sirenko, A.V. Skurikhin, A.G. Solovjev, M.N. Sorokovikov, I. Štekl, A.P. Stromakov, E.O. Sushenok, O.V. Suvorova, V.A. Tabolenko, B.A. Tarashansky, Y.V. Yablokova, S.A. Yakovlev, and D.N. Zaborov

Subjects
Instrumentation, Mathematical Physics
Abstract

The Baikal-GVD is a neutrino telescope situated in the deepest freshwater lake in the world — Lake Baikal. The design of the Baikal-GVD trigger system allows also to study the ambient light of the lake. The analysis of the optical light activity of Baikal water, particularly, time and spatial variations of the luminescence activity for data collected in years 2018, 2019, and 2020 is presented. For the first time we observed highly luminescent layer moving upwards with maximal speed of 28 m/day in January 2021.

Published
2021

15. Time synchronization system of Baikal-GVD

Author

T. I. Gress, A.V. Avrorin, Lukas Fajt, V. M. Aynutdinov, Sergey Yakovlev, E. V. Ryabov, M.M. Kolbin, Aleksandr Gafarov, M.N. Sorokovikov, T. V. Elzhov, O.G. Kebkal, R. R. Mirgazov, R. Bannasch, M.I. Rozanov, Z. Bardačová, Mark Shelepov, S.V. Fialkovsky, A. P. Stromakov, E. O. Sushenok, Dmitry V. Naumov, V. B. Brudanin, V.F. Kulepov, A.G. Solovjev, Evgeniy Khramov, Pa. Malecki, A. V. Skurikhin, A. A. Doroshenko, I. A. Belolaptikov, Konstantin Kebkal, I. Stekl, V.A. Tabolenko, Zh.-A.M. Dzhilkibaev, V. Y. Dik, W. Noga, Y. V. Yablokova, V.D. Rushay, V. A. Allakhverdyan, N.S. Gorshkov, Yury Malyshkin, B.A. Tarashansky, N. M. Budnev, K.V. Golubkov, D. P. Petukhov, A. E. Sirenko, K. A. Kopański, E.N. Pliskovsky, A.D. Avrorin, G.B. Safronov, G.V. Domogatsky, M. S. Katulin, M.V. Kruglov, Rastislav Dvornický, A.V. Korobchenko, Fedor Šimkovic, V. A. Kozhin, M.B. Milenin, K.V. Konischev, I. V. Borina, D. N. Zaborov, A.P. Koshechkin, V. Nazari, B.A. Shaybonov, A. N. Dyachok, E. Eckerová, Olga Suvorova, and M.K. Kryukov

Subjects
Physics, Neutrino detector, Electronic engineering, Instrumentation, Mathematical Physics, Time synchronization
Published
2021

16. The optical noise monitoring systems of the Lake Baikal environment for the Baikal-GVD telescope

Author

T. I. Gress, V. B. Brudanin, V.F. Kulepov, K.V. Golubkov, Lukas Fajt, Evgeniy Khramov, I. A. Belolaptikov, A. V. Skurikhin, M.N. Sorokovikov, A.V. Avrorin, Konstantin Kebkal, M.M. Kolbin, B.A. Tarashansky, Evgenii V Rjabov, A.D. Avrorin, A.P. Koshechkin, G.V. Domogatsky, V.D. Rushay, V. M. Aynutdinov, M.V. Kruglov, Sergey Yakovlev, K.V. Konischev, A. A. Doroshenko, Zh.-A.M. Dzhilkibaev, M.B. Milenin, R. Bannash, Fedor Šimkovic, I. Stekl, R. Ivanov, V.A. Tabolenko, V. Nazari, E.N. Pliskovsky, B.A. Shaybonov, A. N. Dyachok, N.S. Gorshkov, A.V. Kozhin, Olga Suvorova, G.B. Safronov, Rastislav Dvornický, M.K. Kryukov, S.V. Fialkovsky, E. O. Sushenok, Mark Shelepov, N. M. Budnev, D. P. Petukhov, A.V. Korobchenko, A. I. Panfilov, O.G. Kebkal, M.I. Rozanov, A.G. Solovjev, R. R. Mirgazov, and Aleksandr Gafarov

Subjects
Physics, Telescope, Optics, law, business.industry, Neutrino telescope, Cluster (physics), Optical noise, Monitoring system, Luminescence, business, Light field, law.invention
Abstract

We present data on the luminescence of the Baikal water medium collected with the Baikal-GVD neutrino telescope. This three-dimensional array of light sensors allows the observation of time and spatial variations of the ambient light field. We report on observation of an increase of luminescence activity in 2016 and 2018. On the contrary, we observed practically constant optical noise in 2017. An agreement has been found between two independent optical noise data sets. These are data collected with online monitoring system and the trigger system of the cluster.

Published
2019

17. The Baikal-GVD neutrino telescope: First results of multi-messenger study

Author

R. R. Mirgazov, A.V. Avrorin, T. I. Gress, Lukas Fajt, B.A. Tarashansky, M.M. Kolbin, G.B. Safronov, M.V. Kruglov, Rastislav Dvornický, Fedor Šimkovic, K.V. Golubkov, Aleksandr Gafarov, M.N. Sorokovikov, S.V. Fialkovsky, E. O. Sushenok, V. M. Aynutdinov, A.D. Avrorin, A.V. Korobchenko, Sergey Yakovlev, Evgeniy Khramov, Mark Shelepov, I. A. Belolaptikov, Konstantin Kebkal, V. B. Brudanin, V.F. Kulepov, A. V. Skurikhin, G.V. Domogatsky, N.S. Gorshkov, Zhan-Arys Magysovich Dzhilkibaev, V.D. Rushay, M.B. Milenin, Evgenii V Rjabov, E.N. Pliskovsky, A. I. Panfilov, O.G. Kebkal, M.I. Rozanov, R. Bannash, A.G. Solovjev, V. Nazari, N. M. Budnev, I. Stekl, D. P. Petukhov, R. Ivanov, V.A. Tabolenko, A.P. Koshechkin, A. A. Doroshenko, K.V. Konischev, B.A. Shaybonov, A. N. Dyachok, A.V. Kozhin, Olga Suvorova, and M.K. Kryukov

Subjects
Physics, Physics::Instrumentation and Detectors, Gravitational wave, Astrophysics::High Energy Astrophysical Phenomena, media_common.quotation_subject, Astrophysics::Instrumentation and Methods for Astrophysics, Cosmic ray, Astrophysics, Coincidence, Universe, law.invention, Telescope, Neutrino detector, law, High Energy Physics::Experiment, Neutrino, Zenith, media_common
Abstract

Multi-messenger astronomy is a powerful tool to study the physical processes driving the non-thermal Universe. A combination of observations in cosmic rays, neutrinos, photons of all wavelengths and gravitational waves is expected. The alert system of the Baikal-GVD detector under construction will allow for a fast, on-line reconstruction of neutrino events recorded by the Baikal-GVD telescope and - if predefined conditions are satisfied - for the formation of an alert message to other communities. The preliminary results of searches for high-energy neutrinos in coincidence with GW170817/GRB170817A using the cascade mode of neutrino detection are discussed. Two Baikal-GVD clusters were operating during 2017. The zenith angle of NGC 4993 at the detection time of the GW170817 was 93.3 degrees. No events spatially coincident with GRB170817A were found. Given the non-detection of neutrino events associated with GW170817, upper limits on the neutrino fluence were established.

Published
2019

18. Baikal-GVD: first results and prospects

Author

R. Dvornicky, V.F. Kulepov, Valery Zurbanov, A.P. Koshechkin, T. I. Gress, Lukas Fajt, A.V. Skurihin, M.M. Kolbin, V.B. Brudanin, A.V. Kozhin, A.V. Avrorin, Olga Suvorova, V.D. Rushay, Fedor Šimkovic, E. A. Osipova, L. V. Pankov, G.B. Safronov, K.V. Golubkov, Aleksandr Gafarov, B.A. Tarashansky, R. R. Mirgazov, A. V. Zagorodnikov, K.V. Konischev, A. I. Panfilov, E.N. Pliskovsky, A. A. Doroshenko, I. A. Belolaptikov, O.G. Kebkal, Konstantin Kebkal, Zh.-A.M. Dzhilkibaev, M.I. Rozanov, B.A. Shaybonov, A.G. Solovjev, A. N. Dyachok, M.N. Sorokovnikov, E.V. Khramov, V. M. Aynutdinov, Sergey Yakovlev, Z. Honz, M.B. Milenin, A.D. Avrorin, G.V. Domogatsky, R. Bannash, I. Stekl, V.A. Tabolenko, Evgenii V Rjabov, Mark Shelepov, A.V. Korobchenko, D.A. Kuleshov, N. M. Budnev, and S.V. Fialkovsky

Subjects
Physics, Shore, geography, geography.geographical_feature_category, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, QC1-999, Neutrino telescope, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, 01 natural sciences, law.invention, Relativistic particle, Telescope, law, 0103 physical sciences, Cluster (physics), High Energy Physics::Experiment, Neutrino, 010306 general physics, Effective volume
Abstract

Next generation cubic kilometer scale neutrino telescope Baikal-GVD is currently under construction in Lake Baikal. The detector is specially designed for search for high energies neutrinos whose sources are not yet reliably identified. Since April 2018 the telescope has been successfully operated in complex of three functionally independent clusters i.e. sub-arrays of optical modules (OMs) where now are hosted 864 OMs on 24 vertical strings. Each cluster is connected to shore by individual electro-optical cables. The effective volume of the detector for neutrino initiated cascades of relativistic particles with energy above 100 TeV has been increased up to about 0.15 km3. Preliminary results obtained with data recorded in 2016 and 2017 are discussed.

Published
2019

19. Neutrino signal at Baikal from dark matter in the Galactic Center

Author

M.B. Milenin, D.Yu. Bogorodsky, B.A. Tarashansky, V.I. Ljashuk, A.V. Avrorin, A. I. Panfilov, Aleksandr Gafarov, O.G. Kebkal, V. A. Kozhin, A.V. Korobchenko, A.P. Koshechkin, M.I. Rozanov, A. V. Zagorodnikov, Mark Shelepov, B.A. Shaybonov, V.B. Brudanin, A.D. Avrorin, N. M. Budnev, G.V. Domogatsky, R. R. Mirgazov, O. N. Gaponenko, A.A. Smagina, A. N. Dyachok, E.N. Pliskovsky, V.F. Kulepov, Evgenii V Rjabov, D.A. Kuleshov, K.V. Golubkov, F.K. Koshel, Valery Zurbanov, K.V. Konischev, T. I. Gress, I. A. Belolaptikov, Konstantin Kebkal, A.V. Skurihin, A.A. Sheifler, E. A. Osipova, A. A. Doroshenko, Zh.-A.M. Dzhilkibaev, R. Bannasch, S.V. Fialkovsky, V. A. Zhukov, Olga Suvorova, L. V. Pankov, I. A. Danilchenko, V. M. Aynutdinov, Sergey Yakovlev, Zdenek Hons, and Sergei Demidov

Subjects
Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Galactic Center, Dark matter, Scalar field dark matter, Astronomy, Elementary particle, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Galaxy, Massless particle, 0103 physical sciences, High Energy Physics::Experiment, Neutrino, 010306 general physics, Astrophysics::Galaxy Astrophysics, Lepton
Abstract

We discuss neutrinos originating from dark matter in the Galactic Center and present sensitivity of Baikal Gigaton Volume Detector to this signal.

Published
2016

20. A search for neutrino signal from dark matter annihilation in the center of the Milky Way with Baikal NT200

Author

M.B. Milenin, T. I. Gress, E.N. Pliskovsky, Mark Shelepov, A.V. Skurihin, V.B. Brudanin, D.A. Kuleshov, F.K. Koshel, Sergei Demidov, A.V. Avrorin, N. M. Budnev, Aleksandr Gafarov, A.V. Korobchenko, R. R. Mirgazov, A.D. Avrorin, A. V. Zagorodnikov, A.A. Sheifler, B.A. Tarashansky, O. N. Gaponenko, A. I. Panfilov, A.P. Koshechkin, V.F. Kulepov, Evgenii V Rjabov, V. M. Aynutdinov, G.V. Domogatsky, Sergey Yakovlev, Z. Honz, I. A. Danilchenko, O.G. Kebkal, M.I. Rozanov, K.V. Konischev, I. A. Belolaptikov, Konstantin Kebkal, K.V. Golubkov, Valery Zurbanov, V.I. Ljashuk, D.Yu. Bogorodsky, E. A. Osipova, V.A. Tabolenko, R. Bannasch, S.V. Fialkovsky, V. A. Zhukov, A. A. Doroshenko, Zh.-A.M. Dzhilkibaev, A.A. Smagina, A.V. Kozhin, Olga Suvorova, L. V. Pankov, B.A. Shaybonov, and A. N. Dyachok

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Hot dark matter, Dark matter, Scalar field dark matter, FOS: Physical sciences, Astronomy, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Dark matter halo, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Neutrino detector, 0103 physical sciences, Warm dark matter, Neutrino, Astrophysics - High Energy Astrophysical Phenomena, 010306 general physics, Light dark matter
Abstract

We reanalyze the dataset collected during the years 1998--2003 by the deep underwater neutrino telescope NT200 in the lake Baikal with the low energy threshold (10 GeV) in searches for neutrino signal from dark matter annihilations near the center of the Milky Way. Two different approaches are used in the present analysis: counting events in the cones around the direction towards the Galactic Center and the maximum likelihood method. We assume that the dark matter particles annihilate dominantly over one of the annihilation channels $b\bar{b}$, $W^+W^-$, $\tau^+\tau^-$, $\mu^+\mu^-$ or $\nu\bar{\nu}$. No significant excess of events towards the Galactic Center over expected neutrino background of atmospheric origin is found and we derive 90% CL upper limits on the annihilation cross section of dark matter., Comment: 15 pages, 14 figures, published version

Published
2016

21. Gigaton Volume Detector in Lake Baikal: status of the project

Author

V. A. Kozhin, M.B. Milenin, K.V. Golubkov, Mark Shelepov, Evgenii V Rjabov, I. A. Danilchenko, K.V. Konischev, Aleksandr Gafarov, Olga Suvorova, G.B. Safronov, A. I. Panfilov, Zdenek Hons, B.A. Tarashansky, D.A. Kuleshov, R. Bannash, Rastislav Dvornický, Aleksandr Valentinovich Avrovin, L. V. Pankov, G.V. Domogatsky, A.D. Avrorin, F.K. Koshel, R. R. Mirgazov, Aleksey Zagorodnikov, Ivan Štekl, O.G. Kebkal, V.F. Kulepov, M.I. Rozanov, E. A. Osipova, B.A. Shaybonov, V.A. Tabolenko, Valery Zurbanov, A. A. Doroshenko, A. N. Dyachok, A.P. Koshechkin, S.V. Fialkovsky, Fedor Šimkovic, E.N. Pliskovsky, A.V. Korobchenko, Zhan Dzhilkibaev, N. M. Budnev, I. A. Belolaptikov, Sergey Yakovlev, Konstantin Kebkal, V.B. Brudanin, D. P. Petukhov, V.M. Aynutdinov, T. I. Gress, Lukas Fajt, A.V. Skurihin, and M.M. Kolbin

Subjects
Nuclear physics, Physics, Neutrino detector, Neutrino telescope, Detector, Cluster (physics), Volume (compression)
Abstract

Baikal-GVD is a kilometer-scale neutrino telescope under construction in Lake Baikal, which will be formed by multi-megaton subarrays – clusters of strings. A first demonstration cluster “Dubna” has been deployed in 2015 and comprises 192 optical modules (OMs). In 2016 this cluster was upgraded to the baseline configuration which comprises 288 OMs arranged at eight strings. The second full-scale GVD-cluster was deployed and put in operation in 2017. We review the present activity towards the GVD implementation and discuss some selected results obtained with the “Dubna” cluster.

Published
2018

22. Sensitivity of the Baikal-GVD neutrino telescope to neutrino emission toward the center of the galactic dark matter halo

Author

B.A. Shaybonov, I. A. Danilchenko, A. N. Dyachok, Aleksandr Gafarov, A. V. Zagorodnikov, R. Bannasch, A. A. Perevalov, Sergei Demidov, A.A. Sheifler, A.P. Koshechkin, S.V. Fialkovsky, B.A. Tarashansky, A. A. Doroshenko, T. I. Gress, Zh.-A.M. Dzhilkibaev, E.N. Pliskovsky, A.V. Skurihin, V. Yu. Rubtzov, A.V. Kozhin, A.A. Smagina, V.I. Ljashuk, V.B. Brudanin, Olga Suvorova, V. A. Zhukov, K.V. Konischev, A.D. Avrorin, M.B. Milenin, L. V. Pankov, Valery Zurbanov, V.F. Kulepov, K.V. Golubkov, G.V. Domogatsky, E. A. Osipova, A. I. Panfilov, V. M. Aynutdinov, A.V. Korobchenko, Sergey Yakovlev, O.G. Kebkal, Z. Honz, M.I. Rozanov, I. A. Belolaptikov, Konstantin Kebkal, R. R. Mirgazov, D.Yu. Bogorodsky, E. N. Konstantinov, N. M. Budnev, D.A. Kuleshov, F.K. Koshel, O. N. Gaponenko, Evgenii V Rjabov, and A.V. Avrorin

Subjects
Physics, Annihilation, Physics and Astronomy (miscellaneous), Solid-state physics, Astrophysics::High Energy Astrophysical Phenomena, Galactic Center, Dark matter, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, law.invention, Dark matter halo, Telescope, law, High Energy Physics::Experiment, Neutrino, Sensitivity (electronics)
Abstract

We analyze sensitivity of the gigaton volume telescope Baikal-GVD for detection of neutrino signal from dark matter annihilations or decays in the Galactic Center. Expected bounds on dark matter annihilation cross section and its lifetime are found for several annihilation/decay channels.

Published
2015

23. Status and recent results of the BAIKAL-GVD project

Author

V.B. Brudanin, I. A. Danilchenko, R. R. Mirgazov, D.Yu. Bogorodsky, A. V. Skurikhin, A.A. Smagina, A. A. Doroshenko, A. A. Perevalov, Zh.-A.M. Dzhilkibaev, A.D. Avrorin, K. V. Konishchev, I. A. Belolaptikov, Konstantin Kebkal, G.V. Domogatsky, T. I. Gress, N. M. Budnev, E. A. Osipova, E.N. Pliskovsky, A.A. Sheifler, Zdenek Hons, A. I. Panfilov, D.A. Kuleshov, A.P. Koshechkin, O.G. Kebkal, E. N. Konstantinov, Valery Zurbanov, V. Yu. Rubtsov, M.I. Rozanov, F.K. Koshel, Aleksandr Gafarov, R. Bannasch, S.V. Fialkovsky, A. V. Zagorodnikov, A.V. Korobchenko, V. M. Aynutdinov, V. A. Zhukov, Sergey Yakovlev, B.A. Shaybonov, V.F. Kulepov, A. N. Dyachok, Olga Suvorova, L. V. Pankov, V. A. Kozhin, M.B. Milenin, O. N. Gaponenko, Evgenii V Rjabov, B. A. Tarashchansky, V.I. Ljashuk, A.V. Avrorin, K.V. Golubkov, and V.A. Poleshuk

Subjects
Physics, Nuclear and High Energy Physics, business.industry, Software deployment, Detector, business, Computer hardware
Abstract

The Prototyping phase of the BAIKAL-GVD project has been started in April 2011 with the deployment of first autonomous engineering array which comprises all basic elements and systems of the Gigaton Volume Detector (GVD) in Lake Baikal. The prototyping phase will be concluded with deployment of the GVD demonstration cluster “DUBNA” in 2015, which will comprise 192 light sensors arranged at 8 strings. The first stage of the GVD demonstration cluster which consists of three strings was deployed in April 2013 and successfully operated up to February 2014. We review the prototyping phase of the BAIKAL-GVD project and describe the configuration and design of the 2013 engineering array.

Published
2015

24. Baikal-GVD: Time Calibrations in 2016

Author

Aleksandr Gafarov, A.P. Koshechkin, Evgenii V Rjabov, B.A. Shaybonov, V.F. Kulepov, Fedor Šimkovic, A. N. Dyachok, N. M. Budnev, M.B. Milenin, I. A. Danilchenko, A.V. Korobchenko, V.M. Aynutdinov, Zdenek Hons, Mark Shelepov, A. A. Doroshenko, I. A. Belolaptikov, Konstantin Kebkal, A.D. Avrorin, E. A. Osipova, B.A. Tarashansky, D.A. Kuleshov, Valery Zurbanov, F.K. Koshel, Zhan Dzhilkibaev, O V Surovova, A. I. Panfilov, K.V. Konischev, Sergey Yakovlev, Anatoly Kozhin, A.V. Avrorin, O.G. Kebkal, M.I. Rozanov, Aleksey Zagorodnikov, E.N. Pliskovsky, G.B. Safronov, Rastislav Dvornický, L. V. Pankov, G.V. Domogatsky, K.V. Golubkov, D. P. Petukhov, S.V. Fialkovsky, Ivan Štekl, R. Bannash, V.A. Tabolenko, T. I. Gress, Lukas Fajt, A.V. Skurihin, M.M. Kolbin, V.B. Brudanin, and R. R. Mirgazov

Subjects
Neutrino telescope, Detector, Calibration, Cluster (physics), Volume (computing), Environmental science, Angular resolution, Effective volume, Remote sensing
Abstract

In April 2015, the first part (cluster) of the newly constructed next-generation neutrino telescope, Gigaton Volume Detector (GVD), was put into operation in the lake Baikal and started with data taking followed by another cluster installed in April 2017 thus doubling the number of installed Optical Modules (OMs) and instrumented volume. Moreover, the substantial extension of this detector is planned in the next few years. Specifically, another two clusters are going to be installed every consecutive year. In total 8 clusters consisting of 2304 OMs with overall effective volume ~0.4 km3 is going to be deployed by 2020. The vital condition for high angular resolution of reconstructed tracks of particles detected in GVD is a precise timing of individual channels which can be achieved with specialized time calibration systems. In this article, the different light sources and procedures used for time calibration of the GVD in the past as well as the newly developed ones are described and the results of the 2016 time calibration of the cluster Dubna are presented, especially the precision of intra and intersection calibrations and variations of calibration parameters in time.

Published
2017

25. Calibration and monitoring units of the Baikal-GVD neutrino telescope

Author

K.V. Golubkov, Evgenii V Rjabov, E. A. Osipova, A. A. Doroshenko, A.V. Korobchenko, A.V. Avrorin, M.B. Milenin, I. A. Belolaptikov, G.V. Domogatsky, Aleksey Zagorodnikov, Konstantin Kebkal, B.A. Shaybonov, Mark Shelepov, D.A. Kuleshov, A. N. Dyachok, Aleksandr Gafarov, Ivan Štekl, E.N. Pliskovsky, F.K. Koshel, A.V. Kozhin, V.M. Aynutdinov, Olga Suvorova, L. V. Pankov, B.A. Tarashansky, T. I. Gress, S.V. Fialkovsky, A.P. Koshechkin, D. P. Petukhov, Lukas Fajt, N. M. Budnev, A.V. Skurihin, A.D. Avrorin, Fedor Šimkovic, A. I. Panfilov, M.M. Kolbin, O.G. Kebkal, M.I. Rozanov, R. Bannash, Sergey Yakovlev, Z. Honz, V.A. Tabolenko, K.V. Konischev, Zhan Dzhilkibaev, Valery Zurbanov, R. R. Mirgazov, G.B. Safronov, Rastislav Dvornický, V.B. Brudanin, I. A. Danilchenko, and V.F. Kulepov

Subjects
Physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, System of measurement, Neutrino telescope, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Calibration, Neutrino astronomy, Neutrino, Charged particle, Cherenkov radiation, Remote sensing
Abstract

The Baikal-GVD is a cubic kilometer scale neutrino telescope which is deployed in Lake Baikal, that will perform neutrino astronomy studies. It consists of sub-arrays - clusters of about 300 optical modules each, that detect the Cherenkov light radiated by charged particles induced by neutrino interactions with the surrounding medium. The performance of the neutrino telescope relies on the precise timing and positioning calibration of the detector elements, continuous control and monitoring of a behavior of measuring systems, as well as environmental conditions which may affect light detection and event selection. This contribution describes the units which are used in GVD for calibration and monitoring purposes.

Published
2017

26. Search for cascade events with Baikal-GVD demonstration cluster 'Dubna'

Author

A. A. Doroshenko, A. I. Panfilov, O.G. Kebkal, D.A. Kuleshov, M.I. Rozanov, B.A. Shaybonov, F.K. Koshel, V.F. Kulepov, Zdenek Hons, A. N. Dyachok, K.V. Konischev, D. P. Petukhov, Aleksandr Valentinovich Avrovin, M.B. Milenin, I. A. Belolaptikov, Konstantin Kebkal, Olga Suvorova, Aleksandr Gafarov, R. Bannash, K.V. Golubkov, Sergey Yakovlev, L. V. Pankov, A.P. Koshechkin, Aleksey Zagorodnikov, N. M. Budnev, V.A. Tabolenko, A.D. Avrorin, Fedor Šimkovic, R. R. Mirgazov, G.V. Domogatsky, V.M. Aynutdinov, Ivan Štekl, V. A. Kozhin, G.B. Safronov, Evgenii V Rjabov, Rastislav Dvornický, A.V. Korobchenko, T. I. Gress, Mark Shelepov, Lukas Fajt, V.B. Brudanin, A.V. Skurihin, E. A. Osipova, M.M. Kolbin, E.N. Pliskovsky, Valery Zurbanov, Zhan Dzhilkibaev, I. A. Danilchenko, B.A. Tarashansky, and S.V. Fialkovsky

Subjects
Cascade, Neutrino telescope, Cluster (physics), Underwater, Geology, Remote sensing
Abstract

Deep underwater neutrino telescope „Dubna“ – the first, demonstration cluster of Baikal-GVD, has been deployed in April 2015 and was operating up to February 2016 in Lake Baikal. In 2016 this array was upgraded to baseline configuration of GVD-cluster by adding additional 96 optical modules. The next step of array extension was provided in 2017 by deployment of second GVD-cluster in Lake Baikal. We present here preliminary results of a search for cascade events using data sample recorded in 2015 by Dubna array and corresponding to 41 live days of data taking.

Published
2017

27. Data management and processing system for the Baikal-GVD telescope

Author

Valery Zurbanov, R. R. Mirgazov, Fedor Šimkovic, A.D. Avrorin, I. A. Belolaptikov, M.B. Milenin, Konstantin Kebkal, A. I. Panfilov, T. I. Gress, O.G. Kebkal, Olga Suvorova, Lukas Fajt, Sergey Yakovlev, Mark Shelepov, A.V. Skurihin, M.I. Rozanov, R. Bannash, L. V. Pankov, Evgenii V Rjabov, I. A. Danilchenko, M.M. Kolbin, Aleksandr Gafarov, K.V. Konischev, Zdenek Hons, V.A. Tabolenko, K.V. Golubkov, A. A. Doroshenko, B.A. Tarashansky, V.M. Aynutdinov, V. A. Kozhin, D. P. Petukhov, Aleksandr Valentinovich Avrovin, G.V. Domogatsky, Aleksey Zagorodnikov, S.V. Fialkovsky, B.A. Shaybonov, E.N. Pliskovsky, V.B. Brudanin, A. N. Dyachok, Ivan Štekl, V.F. Kulepov, A.P. Koshechkin, A.V. Korobchenko, E. A. Osipova, G.B. Safronov, Rastislav Dvornický, Zhan Dzhilkibaev, N. M. Budnev, D.A. Kuleshov, and F.K. Koshel

Subjects
Telescope, Flexibility (engineering), Software, business.industry, law, Event (computing), Data management, Real-time computing, Point (geometry), Event loop, Raw data, business, law.invention
Abstract

The Baikal-GVD neutrino telescope is being constructed in lake Baikal. The robust Baikal Analysis and Reconstruction Software (BARS) has been developed to convert raw data into physics results. To provide a stable and continuous analysis of all the data an automatic data processing using database is developed. The flexibility of the concept makes it easy to add new steps at any point of the analysis chain. The software is ROOT based collection of C++ classes driven by a central event loop. Now the basic algorithms have been implemented in the system such as event building, signal extraction, background rejection and simple reconstruction.

Published
2017

28. STATUS OF THE BAIKAL-GVD PROJECT: FIRST CLUSTER DUBNA

Author

M.B. Milenin, A.V. Avrorin, V. M. Aynutdinov, I. A. Danilchenko, Sergey Yakovlev, Z. Honz, V.I. Ljashuk, Sergei Demidov, E. A. Osipova, B.A. Tarashansky, S.V. Fialkovsky, V. A. Zhukov, A.D. Avrorin, V.F. Kulepov, I. A. Belolaptikov, Konstantin Kebkal, G.V. Domogatsky, K.V. Konischev, A. I. Panfilov, O.G. Kebkal, D.A. Kuleshov, M.I. Rozanov, N. M. Budnev, F.K. Koshel, Aleksandr Gafarov, K.V. Golubkov, A. V. Zagorodnikov, E.N. Pliskovsky, A.A. Sheifler, O. N. Gaponenko, Evgenii V Rjabov, A.P. Koshechkin, A. A. Doroshenko, D.Yu. Bogorodsky, R. Bannash, Zh.-A.M. Dzhilkibaev, V.B. Brudanin, V.A. Tabolenko, T. I. Gress, A.V. Skurihin, A.A. Smagina, Valery Zurbanov, R. R. Mirgazov, A.V. Kozhin, Olga Suvorova, Mark Shelepov, L. V. Pankov, B.A. Shaybonov, A. N. Dyachok, and A.V. Korobchenko

Subjects
Nuclear physics, Physics, Cluster (physics)
Published
2017

29. Baikal-GVD

Author

A.D. Avrorin, A.V. Avrorin, V.M. Aynutdinov, R. Bannash, I.A. Belolaptikov, V.B. Brudanin, N.M. Budnev, I.A. Danilchenko, S.V. Demidov, G.V. Domogatsky, A.A. Doroshenko, R. Dvornicky, A.N. Dyachok, Zh.-A.M. Dzhilkibaev, L. Fajt, S.V. Fialkovsky, A.R. Gafarov, O.N. Gaponenko, K.V. Golubkov, T.I. Gress, Z. Honz, K.G. Kebkal, O.G. Kebkal, K.V. Konischev, A.V. Korobchenko, A.P. Koshechkin, F.K. Koshel, A.V. Kozhin, V.F. Kulepov, D.A. Kuleshov, M.B. Milenin, R.A. Mirgazov, E.R. Osipova, A.I. Panfilov, L.V. Pan’kov, E.N. Pliskovsky, M.I. Rozanov, E.V. Rjabov, F.A. Shamakhov, B.A. Shaybonov, A.A. Sheifler, M.D. Shelepov, F. Simkovic, A.V. Skurihin, A.A. Smagina, I. Stekl, O.V. Suvorova, V.A. Tabolenko, B.A. Tarashansky, S.A. Yakovlev, A.V. Zagorodnikov, and V.L. Zurbanov

Subjects
Physics, QC1-999, 0103 physical sciences, 010306 general physics, 010303 astronomy & astrophysics, 01 natural sciences
Abstract

We present the status of the Gigaton Volume Detector in Lake Baikal (Baikal-GVD) designed for the detection of high energy neutrinos of astrophysical origin. The telescope consists of functionally independent clusters, sub-arrays of optical modules (OMs), which are connected to shore by individual electro-optical cables. During 2015 the GVD demonstration cluster, comprising 192 OMs, has been successfully operated in Lake Baikal. In 2016 this array was upgraded to baseline configuration of GVD cluster with 288 OMs arranged on eight vertical strings. Thus the instrumented water volume has been increased up to about 5.9 Mtons. The array was commissioned in early April 2016 and takes data since then. We describe the configuration and design of the 2016 array. Preliminary results obtained with data recorded in 2015 are also discussed.

Published
2017

30. The prototyping/early construction phase of the BAIKAL-GVD project

Author

K.V. Golubkov, V. M. Aynutdinov, Sergey Yakovlev, I. A. Belolaptikov, Konstantin Kebkal, A. I. Panfilov, A.V. Korobchenko, E.N. Pliskovsky, V.F. Rubtsov, Z. Honz, M.B. Milenin, O.G. Kebkal, Aleksandr Gafarov, A. V. Skurikhin, M.I. Rozanov, Olga Suvorova, A. V. Zagorodnikov, L. V. Pankov, T. I. Gress, R. Bannasch, V.A. Poleshuk, I. A. Danilchenko, A.P. Koshechkin, S.V. Fialkovsky, K. V. Konishchev, V. A. Zhukov, N. M. Budnev, D.Yu. Bogorodsky, O. N. Gaponenko, V. A. Kozhin, Evgenii V Rjabov, A.D. Avrorin, R. R. Mirgazov, B. A. Tarashchansky, Valery Zurbanov, G.V. Domogatsky, A. A. Perevalov, E. N. Konstantinov, B.A. Shaybonov, V.I. Ljashuk, A. N. Dyachok, D.A. Kuleshov, V.F. Kulepov, V.B. Brudanin, F.K. Koshel, A.A. Sheifler, A.V. Avrorin, A.A. Smagina, A. A. Doroshenko, Zh.-A.M. Dzhilkibaev, E. A. Osipova, and A. I. Lolenko

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Nuclear and High Energy Physics, Engineering drawing, String (computer science), Detector, Phase (waves), FOS: Physical sciences, Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Instrumentation and Methods for Astrophysics (astro-ph.IM), Instrumentation
Abstract

The Prototyping phase of the BAIKAL-GVD project has been started in April 2011 with the deployment of a three string engineering array which comprises all basic elements and systems of the Gigaton Volume Detector (GVD) in Lake Baikal. In April 2012 the version of engineering array which comprises the first full-scale string of the GVD demonstration cluster has been deployed and operated during 2012. The first stage of the GVD demonstration cluster which consists of three strings is deployed in April 2013. We review the Prototyping phase of the BAIKAL-GVD project and describe the configuration and design of the 2013 engineering array., Proceedings of the RICAP 2013 Conference, Rome, Italy, May 22-24, 2013, 7 pages, 12 figures

Published
2014

31. Dark matter constraints from an observation of dSphs and the LMC with the Baikal NT200

Author

D.A. Kuleshov, F.K. Koshel, E. A. Osipova, R. Bannasch, S.V. Fialkovsky, R. R. Gafarov, M. V. Milenin, K. V. Konishchev, A.A. Sheifler, E.N. Pliskovsky, R. Dvornicky, B.A. Shaybonov, V.B. Brudanin, A. N. Dyachok, A. A. Doroshenko, A.D. Avrorin, I. A. Danilchenko, G.V. Domogatsky, Zh.-A.M. Dzhilkibaev, A.V. Kozhin, A.V. Avrorin, Olga Suvorova, A.P. Koshechkin, K.V. Golubkov, R. R. Mirgazov, L. V. Pankov, A. V. Zagorodnikov, V. M. Aynutdinov, V.F. Kulepov, A. I. Panfilov, T. I. Gress, Sergey Yakovlev, O.G. Kebkal, M.I. Rozanov, Z. Honz, Lukas Fajt, A.V. Skurihin, I. A. Belolaptikov, Konstantin Kebkal, Sergei Demidov, Valery Zurbanov, O. N. Gaponenko, Evgenii V Rjabov, B. A. Tarashchansky, V.A. Tabolenko, Mark Shelepov, N. M. Budnev, and A.V. Korobchenko

Subjects
Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Annihilation, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, General Physics and Astronomy, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Galaxy, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Neutrino detector, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Neutrino, Large Magellanic Cloud, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, Southern Hemisphere, Astrophysics::Galaxy Astrophysics, Dwarf galaxy
Abstract

In present analysis we complete search for a dark matter signal with the Baikal neutrino telescope NT200 from potential sources in the sky. We use five years of data and look for neutrinos from dark matter annihilations in the dwarfs spheroidal galaxies in the Southern hemisphere and the Large Magellanic Cloud known as the largest and close satellite galaxy of the Milky Way. We do not find any excess in observed data over expected background from the atmospheric neutrinos towards the LMC or any of tested 22 dwarfs. We perform a joint likelihood analysis on the sample of five selected dwarfs and found a concordance of the data with null hypothesis of the background-only observation. We derive 90% CL upper limits on the cross section of annihilating dark matter particles of mass between 30 GeV and 10 TeV into several channels both in our combined analysis of the dwarfs and in a particular analysis towards the LMC., 15 pages, 11 figures

Published
2016

32. Spatial positioning of underwater components for Baikal- GVD

Author

Aleksandr Gafarov, A. V. Zagorodnikov, R. R. Mirgazov, Mark Shelepov, E.N. Pliskovsky, A.V. Skurichin, T.I. Gres, K.V. Golubkov, K.V. Konischev, R. Bannash, B.A. Shaybonov, V.F. Kulepov, D. P. Petukhov, Evgenii V Rjabov, A. N. Dyachok, A.D. Avrorin, V. A. Kozhin, V.A. Tabolenko, I. Shtekl, M.V. Kruglov, I. A. Belolaptikov, Konstantin Kebkal, Olga Suvorova, A.V. Avrorin, V.D. Rushay, S.V. Fialkovsky, V.M. Aynutdinov, M.N. Sorokovikov, M.K. Kryukov, V.B. Brudanin, A. I. Panfilov, B.A. Tarashansky, Lukas Fajt, A. A. Doroshenko, O.G. Kebkal, M.B. Milenin, M.I. Rozanov, M.M. Kolbin, A.V. Korobchenko, Zh.-A.M. Dzhilkibaev, V. Nazari, G.V. Domogatsky, A.G. Solovjev, G.B. Safronov, Rastislav Dvornický, N.S. Gorshkov, A.P. Koshechkin, E.V. Khramov, Sergey Yakovlev, Fedor Šimkovic, N. M. Budnev, and D.A. Kuleshov

Subjects
Spatial positioning, Positioning system, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Orientation (computer vision), Astrophysics::High Energy Astrophysical Phenomena, Physics, QC1-999, Detector, Neutrino telescope, Astrophysics::Instrumentation and Methods for Astrophysics, Geodesy, 01 natural sciences, Acceleration, Timing error, 0103 physical sciences, Underwater, 010306 general physics
Abstract

Baikal-GVD is a cubic kilometer-scale neutrino telescope currently under construction in Lake Baikal. The detector’s components are mobile and may drift from their initial coordinates or change their spatial orientation. This introduces a reconstruction error, particularly a timing error for PMT hits. This problem is mitigated by a combination of a hydroacoustic positioning system and per-component acceleration and orientation sensors. Under regular conditions, the average positioning accuracy for a GVD component is estimated to be less than 13 cm.

Published
2019

33. Luminescence of water in Lake Baikal observed with the Baikal-GVD neutrino telescope

Author

V.F. Kulepov, R. Bannash, Aleksandr Gafarov, T. I. Gress, I. Stekl, V.A. Tabolenko, A. V. Zagorodnikov, Lukas Fajt, Evgenii V Rjabov, A.V. Avrorin, B.A. Tarashansky, E.V. Khramov, M.M. Kolbin, A.V. Korobchenko, V. M. Aynutdinov, Sergey Yakovlev, D.A. Kuleshov, M.V. Kruglov, V.D. Rushay, A.D. Avrorin, V. Nazari, I. A. Belolaptikov, Konstantin Kebkal, R. R. Mirgazov, K.V. Golubkov, G.V. Domogatsky, M.N. Sorokovikov, A. A. Doroshenko, Zh.-A.M. Dzhilkibaev, Fedor Šimkovic, K.V. Konischev, A.P. Koshechkin, M.B. Milenin, V. A. Kozhin, B.A. Shaybonov, A. N. Dyachok, G.B. Safronov, Rastislav Dvornický, A. I. Panfilov, Olga Suvorova, O.G. Kebkal, M.I. Rozanov, S.V. Fialkovsky, M.K. Kryukov, A.G. Solovjev, N.S. Gorshkov, E.N. Pliskovsky, N. M. Budnev, D. P. Petukhov, Mark Shelepov, and V. B. Brudanin

Subjects
Physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, QC1-999, Neutrino telescope, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, 01 natural sciences, 0103 physical sciences, 010306 general physics, Luminescence, Light field
Abstract

We present data on the luminescence of the Baikal water medium collected with the Baikal-GVD neutrino telescope. This three-dimensional array of light sensors allows the observation of time and spatial variations of the ambient light field. In 2016, we observed a maximum of luminescence activity between July and October.

Published
2019

34. Status of the Baikal-GVD Neutrino Telescope

Author

N. M. Budnev, A.V. Korobchenko, M.B. Milenin, A.V. Avrorin, Mark Shelepov, K.V. Konischev, R. Bannash, Lukas Fajt, V. A. Kozhin, A.V. Skurichin, M.M. Kolbin, B.A. Tarashansky, M.N. Sorokovikov, A. A. Doroshenko, D.A. Kuleshov, V.F. Kulepov, V.A. Tabolenko, E.V. Khramov, A. I. Panfilov, V.B. Brudanin, Zh.-A.M. Dzhilkibaev, R. R. Mirgazov, T.I. Gres, B.A. Shaybonov, A.P. Koshechkin, S.V. Fialkovsky, O.G. Kebkal, M.I. Rozanov, Fedor Šimkovic, V.D. Rushay, A. N. Dyachok, Sergey Yakovlev, K.V. Golubkov, V.M. Aynutdinov, V. Nazari, A.G. Solovjev, E.N. Pliskovsky, M.V. Kruglov, G.V. Domogatsky, D. P. Petukhov, Olga Suvorova, M.K. Kryukov, Aleksandr Gafarov, A. V. Zagorodnikov, I. Shtekl, A.D. Avrorin, G.B. Safronov, Rastislav Dvornický, I. A. Belolaptikov, Konstantin Kebkal, N.S. Gorshkov, and Evgenii V Rjabov

Subjects
Physics, Scale (ratio), Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Cherenkov detector, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Detector, Neutrino telescope, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, 01 natural sciences, law.invention, law, 0103 physical sciences, High Energy Physics::Experiment, Underwater, 010306 general physics
Abstract

Currently in Lake Baikal a new-generation neutrino telescope is being deployed: Baikal-GVD, a deep underwater Cherenkov detector on the cubic-kilometer scale. This paper presents the status of the detector implementation and the first physical results obtained with the existing configuration.

Published
2019

35. Current status of the BAIKAL-GVD project

Author

A. V. Zagorodnikov, T. I. Gress, A. A. Sheifler, A.P. Koshechkin, D.A. Kuleshov, F.K. Koshel, A. V. Shirokov, V.A. Poleshuk, I. A. Belolaptikov, A. A. Perevalov, Konstantin Kebkal, V.B. Brudanin, V.F. Kulepov, Valery Zurbanov, E.N. Pliskovsky, A. V. Skurikhin, A. I. Panfilov, A. M. Klabukov, M.B. Milenin, O.G. Kebkal, S.V. Fialkovsky, O. N. Gaponenko, M.I. Rozanov, O. G. Grishin, V. A. Zhukov, Evgenii V Rjabov, K.V. Golubkov, G.V. Domogatsky, R. R. Mirgazov, I. A. Danilchenko, B. A. Tarashchansky, K. V. Konishchev, N. M. Budnev, V.I. Ljashuk, A.V. Korobchenko, D. A. Petukhov, O. A. Gress, V. A. Kozhin, V.F. Rubtsov, A. S. Yagunov, E.G. Popova, L. A. Kuzmichev, E. A. Osipova, A. Pan'kov, V. M. Aynutdinov, B.A. Shaybonov, A. N. Dyachok, D.Yu. Bogorodsky, Olga Suvorova, L. V. Pankov, A. Pakhorukov, A. A. Doroshenko, Zh.-A.M. Dzhilkibaev, and A.V. Avrorin

Subjects
Physics, Current (stream), Nuclear and High Energy Physics, Neutrino detector, Neutrino telescope, Systems engineering, Milestone (project management), Astronomy, Instrumentation, Technical design
Abstract

We present a status of the Baikal-GVD Project. The objective of this project is a construction of a km3-scale neutrino telescope in the Lake Baikal. As an important milestone, the first GVD engineering array has been deployed and ran in April, 2011. Application of a completely new technology gave us an opportunity to study all the basic elements of the future full detector and to finalize the GVD technical design. We discuss the configuration and the design of the engineering array as well as data performance with the preliminary results.

Published
2013

36. LED based calibration systems of the Baikal-GVD neutrino telescope

Author

M.B. Milenin, B.A. Shaybonov, D.Yu. Bogorodsky, K.V. Konischev, A.A. Smagina, A. N. Dyachok, B.A. Tarashansky, R. Bannash, A.A. Sheifler, I. A. Danilchenko, Aleksandr Gafarov, A.V. Kozhin, A.P. Koshechkin, A. V. Zagorodnikov, Olga Suvorova, A.V. Korobchenko, A. A. Doroshenko, A.D. Avrorin, E. A. Osipova, L. V. Pankov, K.V. Golubkov, Zh.-A.M. Dzhilkibaev, A.V. Avrorin, V.I. Ljashuk, Mark Shelepov, G.V. Domogatsky, V.A. Tabolenko, A. I. Panfilov, V.F. Kulepov, O.G. Kebkal, M.I. Rozanov, S.V. Fialkovsky, D.A. Kuleshov, Sergey Yakovlev, Z. Honz, F.K. Koshel, V. A. Zhukov, N. M. Budnev, V.B. Brudanin, R. R. Mirgazov, Valery Zurbanov, T. I. Gress, E.N. Pliskovsky, A.V. Skurihin, I. A. Belolaptikov, Konstantin Kebkal, O. N. Gaponenko, Evgenii V Rjabov, and V.M. Aynutdinov

Subjects
Physics, Scale (ratio), Calibration (statistics), Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, QC1-999, Neutrino telescope, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astrophysics, Nonlinear Sciences::Pattern Formation and Solitons
Abstract

Baikal-GVD is a cubic-kilometer scale neutrino telescope, which is currently under construction in Lake Baikal. GVD will consist of an array of optical modules arranged in clusters of strings. The first GVD-cluster has been deployed and put in operation in April 2015. We describe equipment and methods for the calibration of the first GVD-cluster and discuss the accuracy of the calibration procedures.

Published
2016

37. Baikal-GVD: Results, status and plans

Author

A.V. Avrorin, V.F. Kulepov, D.Yu. Bogorodsky, R. Bannash, O. N. Gaponenko, V.A. Tabolenko, K.V. Golubkov, A. A. Doroshenko, Evgenii V Rjabov, Zh.-A.M. Dzhilkibaev, A.P. Koshechkin, A.A. Smagina, V.I. Ljashuk, A.V. Korobchenko, B.A. Tarashansky, Mark Shelepov, N. M. Budnev, A. I. Panfilov, A.D. Avrorin, E. A. Osipova, O.G. Kebkal, M.I. Rozanov, G.V. Domogatsky, Aleksandr Gafarov, Sergey Yakovlev, A. V. Zagorodnikov, E.N. Pliskovsky, Z. Honz, D.A. Kuleshov, A.A. Sheifler, S.V. Fialkovsky, M.B. Milenin, F.K. Koshel, K.V. Konischev, I. A. Danilchenko, I. A. Belolaptikov, Konstantin Kebkal, R. R. Mirgazov, V.B. Brudanin, B.A. Shaybonov, A. N. Dyachok, A.V. Kozhin, Olga Suvorova, Valery Zurbanov, L. V. Pankov, V.M. Aynutdinov, T. I. Gress, and A.V. Skurihin

Subjects
Physics, Modular structure, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, QC1-999, Neutrino telescope, Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics, 01 natural sciences, Software deployment, Functionally independent, 0103 physical sciences, Systems engineering, Neutrino, 010306 general physics, Nonlinear Sciences::Pattern Formation and Solitons
Abstract

The future next-generation neutrino telescope Baikal-GVD will be a km3-scale array aimed at the detection of astrophysical neutrino fluxes. It will have modular structure and consist of functionally independent sub-arrays - clusters of strings of optical modules. The prototyping phase of the project has been concluded in 2015 with the deployment of the first cluster of Baikal-GVD in Lake Baikal. We discuss the current status and perspectives of the Baikal-GVD project.

Published
2016

38. STATUS OF THE BAIKAL-GVD PROJECT

Author

N. M. Budnev, V. A. Kozhin, A.P. Koshechkin, A.A. Sheifler, D.Yu. Bogorodsky, E. A. Osipova, A.A. Smagina, Valery Zurbanov, A.V. Avrorin, A. V. Skurikhin, V. A. Poleshuk, E.N. Pliskovsky, Aleksandr Gafarov, A. I. Panfilov, K. V. Konishchev, V.B. Brudanin, O.G. Kebkal, V. M. Aynutdinov, M.I. Rozanov, A.D. Avrorin, A. V. Zagorodnikov, T. I. Gress, I. A. Danilchenko, Sergey Yakovlev, O. N. Gaponenko, Evgenii V Rjabov, K.V. Golubkov, Z. Honz, G.V. Domogatsky, M.B. Milenin, A. A. Doroshenko, Zh.-A.M. Dzhilkibaev, B. A. Tarashchansky, R. R. Mirgazov, V.F. Rubtsov, V.F. Kulepov, D.A. Kuleshov, F.K. Koshel, A. A. Perevalov, A.V. Korobchenko, I. A. Belolaptikov, Konstantin Kebkal, Olga Suvorova, L. V. Pankov, V.I. Ljashuk, B.A. Shaybonov, A. N. Dyachok, E. N. Konstantinov, R. Bannasch, S.V. Fialkovsky, and V. A. Zhukov

Subjects
Physics
Published
2015

39. Acoustic Search for High Energy Neutrinos in Lake Baikal: Status and Perspectives

Author

A.V. Avrorin, V.F. Kulepov, B.A. Shaybonov, E. A. Osipova, A. N. Dyachok, A. A. Doroshenko, Zh.-A.M. Dzhilkibaev, V.I. Ljashuk, K.V. Golubkov, Mark Shelepov, A.V. Shkurihin, E.N. Pliskovsky, B.A. Tarashansky, A.A. Smagina, I. A. Belolaptikov, Konstantin Kebkal, A.V. Kozhin, Aleksandr Gafarov, D.Yu. Bogorodsky, Olga Suvorova, R. R. Mirgazov, A.D. Avrorin, A. V. Zagorodnikov, L. V. Pankov, G.V. Domogatsky, V.A. Tabolenko, M.B. Milenin, I. A. Danilchenko, V.B. Brudanin, O. N. Gaponenko, Evgenii V Rjabov, Valery Zurbanov, A. I. Panfilov, O.G. Kebkal, M.I. Rozanov, T. I. Gress, A.V. Korobchenko, V. Yu. Rubtzov, N. M. Budnev, V. M. Aynutdinov, Sergey Yakovlev, Z. Honz, D.A. Kuleshov, F.K. Koshel, R. Bannasch, S.V. Fialkovsky, A.A. Sheifler, K.V. Konischev, A.P. Koshechkin, and A. A. Perevalov

Subjects
Physics, High energy, COSMIC cancer database, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Neutrino telescope, Ambient noise level, Astrophysics::Instrumentation and Methods for Astrophysics, 01 natural sciences, 0103 physical sciences, High Energy Physics::Experiment, Neutrino, 010306 general physics, Remote sensing
Abstract

We report theoretical and experimental results of on-going feasibility studies to detect cosmic neutrinos acoustically in Lake Baikal. In order to examine ambient noise conditions and to develop re- spective pulse detection techniques a prototype device was created. The device is operating at a depth of 150 m at the site of the Baikal Neutrino Telescope and is capable to detect and classify acoustic signals with different shapes, as well as signals from neutrino- induced showers.

Published
2017

40. Status and perspectives of the BAIKAL-GVD project

Author

V.F. Kulepov, K.V. Golubkov, I. A. Belolaptikov, A.P. Koshechkin, A.A. Smagina, Konstantin Kebkal, A.V. Avrorin, I. A. Danilchenko, O. N. Gaponenko, R. R. Mirgazov, Evgenii V Rjabov, A.D. Avrorin, K.V. Konischev, G.V. Domogatsky, N. M. Budnev, E. A. Osipova, A.V. Korobchenko, E. N. Konstantinov, A. A. Doroshenko, V.M. Aynutdinov, Sergey Yakovlev, Zh.-A.M. Dzhilkibaev, Aleksandr Gafarov, D.Yu. Bogorodsky, A. I. Panfilov, Z. Honz, T. I. Gress, A. V. Zagorodnikov, R. Bannash, A.A. Sheifler, O.G. Kebkal, S.V. Fialkovsky, M.I. Rozanov, V.B. Brudanin, A.V. Skurihin, B.A. Tarashansky, E.N. Pliskovsky, V. Yu. Rubtzov, V. A. Zhukov, V.I. Ljashuk, V.A. Tabolenko, D.A. Kuleshov, Valery Zurbanov, A. A. Perevalov, F.K. Koshel, M.B. Milenin, A.V. Kozhin, Olga Suvorova, L. V. Pankov, B.A. Shaybonov, and A. N. Dyachok

Subjects
Physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Neutrino telescope, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astrophysics, 01 natural sciences, law.invention, Telescope, law, Software deployment, Functionally independent, 0103 physical sciences, Cluster (physics), Neutrino, 010306 general physics
Abstract

The neutrino telescope Baikal-GVD in Lake Baikal will be a research infrastructure aimed mainly at studying astrophysical neutrino fluxes. The telescope will consist of clusters of strings – functionally independent sub-arrays. The deployment of the first demonstration cluster has been started in April 2013. In 2014 the deployment of the second stage of the demonstration cluster has been performed. We describe the configuration and design of the first GVD cluster and review the current status of cluster deployment in Lake Baikal.

Published
2016

41. The optical module of Baikal-GVD

Author

K.V. Golubkov, A.A. Smagina, E. A. Osipova, A.V. Avrorin, A.V. Korobchenko, V.F. Kulepov, A.D. Avrorin, T. I. Gress, G.V. Domogatsky, A.V. Skurihin, I. A. Danilchenko, I. A. Belolaptikov, Konstantin Kebkal, B.A. Tarashansky, V.B. Brudanin, A. A. Doroshenko, Zh.-A.M. Dzhilkibaev, M.B. Milenin, Aleksandr Gafarov, R. R. Mirgazov, V. M. Aynutdinov, A. V. Zagorodnikov, O. N. Gaponenko, Valery Zurbanov, N. M. Budnev, Evgenii V Rjabov, Sergey Yakovlev, Z. Honz, D.Yu. Bogorodsky, R. Bannash, D.A. Kuleshov, F.K. Koshel, V.A. Tabolenko, A.A. Sheifler, K.V. Konischev, A.P. Koshechkin, V.I. Ljashuk, S.V. Fialkovsky, V. A. Zhukov, B.A. Shaybonov, A. N. Dyachok, E.N. Pliskovsky, A.V. Kozhin, Olga Suvorova, L. V. Pankov, A. I. Panfilov, O.G. Kebkal, M.I. Rozanov, and Mark Shelepov

Subjects
Nuclear and High Energy Physics, Photomultiplier, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, QC1-999, Astrophysics, 01 natural sciences, String (physics), Particle detector, Optical Module, Data acquisition, Optics, 0103 physical sciences, Calibration, Radiology, Nuclear Medicine and imaging, Electronics, 010306 general physics, Nonlinear Sciences::Pattern Formation and Solitons, 010302 applied physics, Physics, Radiation, 010308 nuclear & particles physics, business.industry, Astrophysics::Instrumentation and Methods for Astrophysics, Modular design, Atomic and Molecular Physics, and Optics, Neutrino detector, Measuring instrument, High Energy Physics::Experiment, business, Sensitivity (electronics)
Abstract

In April 2015, the first cluster of Baikal-GVD was deployed in Lake Baikal and put into operation. It comprises eight strings. Each string consists of 24 optical modules. An optical module is a detection element of Baikal-GVD; it includes a Hamamatsu R7081-100 photomultiplier tube with a high quantum sensitivity. We describe the design of the optical module, the front-end electronics, and the laboratory characterization and calibration.

Published
2016

42. The optical detection unit for Baikal-GVD neutrino telescope

Author

R. Bannash, A. I. Panfilov, A.A. Smagina, O.G. Kebkal, M.I. Rozanov, V.A. Tabolenko, V.I. Ljashuk, K.V. Konischev, B.A. Tarashansky, A.P. Koshechkin, A.A. Sheifler, A. A. Doroshenko, R. R. Mirgazov, A.D. Avrorin, Zh.-A.M. Dzhilkibaev, V.M. Aynutdinov, I. A. Danilchenko, G.V. Domogatsky, E.N. Pliskovsky, V.F. Kulepov, A.V. Avrorin, M.B. Milenin, K.V. Golubkov, Valery Zurbanov, E. N. Konstantinov, Sergey Yakovlev, E. A. Osipova, O. N. Gaponenko, A. A. Perevalov, Z. Honz, A.V. Korobchenko, Evgenii V Rjabov, T. I. Gress, A.V. Skurihin, V. Yu. Rubtzov, I. A. Belolaptikov, Konstantin Kebkal, Aleksandr Gafarov, S.V. Fialkovsky, V. A. Zhukov, V.B. Brudanin, A. V. Zagorodnikov, A.V. Kozhin, Olga Suvorova, L. V. Pankov, B.A. Shaybonov, A. N. Dyachok, D.A. Kuleshov, F.K. Koshel, N. M. Budnev, and D.Yu. Bogorodsky

Subjects
Physics, Physics::Instrumentation and Detectors, business.industry, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Neutrino telescope, Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics, String (physics), Optics, Section (archaeology), Calibration, business
Abstract

The first stage of the GVD-cluster composed of five strings was deployed in April 2014. Each string consists of two sections with 12 optical modules per section. A section is the basic detection unit of the Baikal neutrino telescope. We will describe the section design, review its basic elements – optical modules, FADC readout units, slow control and calibration systems, and present selected results for section in-situ tests in Lake Baikal.

Published
2016

43. Status of the Baikal-GVD project

Author

O. N. Gaponenko, Evgenii V Rjabov, A. V. Zagorodnikov, V.I. Ljashuk, B. A. Tarashchansky, A.V. Avrorin, R. R. Mirgazov, A. I. Panfilov, A. A. Doroshenko, I. A. Belolaptikov, Konstantin Kebkal, A. G. Kebkal, V.A. Poleshuk, Zh.-A.M. Dzhilkibaev, M.I. Rozanov, R. Bannasch, D.A. Kuleshov, F.K. Koshel, V.B. Brudanin, O. G. Grishin, S.V. Fialkovsky, K.V. Golubkov, O. A. Gress, V. A. Zhukov, A. S. Yagunov, V. A. Kozhin, N. M. Budnev, S. P. Mikheev, E.N. Pliskovsky, G.V. Domogatsky, V.F. Kulepov, A. M. Klabukov, I. A. Danilchenko, K. V. Konishchev, M.B. Milenin, T. I. Gress, A. A. Sheifler, D. A. Petukhov, A.V. Korobchenko, A. A. Perevalov, A. V. Shirokov, V.F. Rubtsov, A.P. Koshechkin, E.G. Popova, Valery Zurbanov, L. A. Kuzmichev, A. V. Skurikhin, B.A. Shaybonov, A. N. Dyachok, Ch. Spiering, A. Pakhorukov, Olga Suvorova, E. A. Osipova, A. I. Klimov, L. V. Pankov, A. Pan'kov, V. M. Aynutdinov, and D.Yu. Bogorodsky

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Neutrino detector, Pulse circuits, Detector, Neutrino telescope, ddc:530, Underwater, Instrumentation, Technical design, Underwater acoustic communication, Remote sensing
Abstract

The construction of a km 3 -scale neutrino telescope – the Gigaton Volume Detector (GVD) in Lake Baikal – is the central goal of the Baikal collaboration. During the R&D phase of the GVD project in 2008–2010 years the basic elements of GVD – new optical modules, FADC readout units, underwater communications and trigger systems – have been developed, produced and tested in situ by long-term operating prototype strings in Lake Baikal. The prototyping phase of the GVD project has been started in April 2011 with the installation of a three string array (prototype cluster) which comprises all basic elements and systems of the GVD-telescope in Lake Baikal. We describe configuration and technical design of the GVD, present selected results obtained during 2008–2010 with prototype strings, and describe configuration and design of the 2011 prototype cluster.

Published
2012

44. Present status of the BAIKAL-GVD project development

Author

L. A. Kuzmichev, A. I. Panfilov, V.F. Kulepov, K.V. Golubkov, M.I. Rozanov, V. Karnaukhov, Valery Zurbanov, V. A. Kozhin, A.D. Avrorin, A. A. Perevalov, D. P. Petukhov, G.V. Domogatsky, R. Bannasch, S.V. Fialkovsky, Aleksandr Gafarov, V. A. Zhukov, R. R. Mirgazov, K. V. Konishchev, A. V. Zagorodnikov, A.P. Koshechkin, A. V. Skurikhin, D. Bogorodsky, N. M. Budnev, Olga Suvorova, I. A. Danilchenko, T. I. Gress, A. A. Sheifler, E. A. Osipova, L. V. Pankov, V.I. Ljashuk, A. A. Doroshenko, Zh.-A.M. Dzhilkibaev, O. N. Gaponenko, V. Rubzov, D.A. Kuleshov, M.B. Milenin, A.V. Korobchenko, V.B. Brudanin, Evgenii V Rjabov, B.A. Shaybonov, F.K. Koshel, A. N. Dyachok, B. A. Tarashchansky, I. A. Belolaptikov, Konstantin Kebkal, A. G. Kebkal, E.N. Pliskovsky, A. M. Klabukov, A. Pan'kov, V. M. Aynutdinov, Sergey Yakovlev, V Dobrinin, and V.A. Poleshuk

Subjects
History, Engineering, Data acquisition, Neutrino detector, business.industry, Neutrino telescope, Systems engineering, Project management, business, Civil engineering, Technical design, Computer Science Applications, Education
Abstract

We present a current status of the Baikal-GVD Project. The objective of this project is a construction of a km3-scale neutrino telescope in the Baikal lake. Set of prototype arrays which were installed and operated during 2009-2011 in Lake Baikal allowed to study all basic elements of the future full detector and to finalize the GVD technical design. We discuss the configuration and the design of the engineering arrays as well as DAQ performance and the preliminary results.

Published
2013

45. Search for cascade events with Baikal-GVD

Author

Zhan-Arys Magysovich Dzhilkibaev, G.V. Domogatsky, R. R. Mirgazov, N. M. Budnev, A. I. Panfilov, A.V. Korobchenko, O.G. Kebkal, M.I. Rozanov, Ivan Štekl, V. Nazari, I. A. Belolaptikov, B.A. Shaybonov, A.G. Solovjev, A. N. Dyachok, A. A. Doroshenko, Konstantin Kebkal, Evgeny V. Khramov, A.V. Kozhin, A. V. Skurikhin, Olga Suvorova, V.B. Brudanin, G.B. Safronov, M.K. Kryukov, M.B. Milenin, Rastislav Dvornický, K.V. Konischev, K.V. Golubkov, D. P. Petukhov, Sergey Yakovlev, A.D. Avrorin, E.N. Pliskovsky, Evgenii V Rjabov, S.V. Fialkovsky, E. O. Sushenok, R. Bannash, V.D. Rushay, V.M. Aynutdinov, T. I. Gress, Lukas Fajt, A.P. Koshechkin, M.M. Kolbin, B.A. Tarashansky, R. Ivanov, V.A. Tabolenko, N.S. Gorshkov, Aleksandr Gafarov, V.F. Kulepov, M.N. Sorokovikov, M.V. Kruglov, A.V. Avrorin, Fedor Šimkovic, and Mark Shelepov

Subjects
Physics, Physics::Instrumentation and Detectors, Cascade, Astrophysics::High Energy Astrophysical Phenomena, Neutrino telescope, Astrophysics::Instrumentation and Methods for Astrophysics, Mode (statistics), High Energy Physics::Experiment, Astrophysics, Neutrino, Nonlinear Sciences::Pattern Formation and Solitons
Abstract

Baikal-GVD is a next generation, kilometer-scale neutrino telescope currently under construction in Lake Baikal. GVD is formed by multi-megaton subarrays (clusters) and is designed for the detection of astrophysical neutrino fluxes at energies from a few TeV up to 100 PeV. The design of Baikal-GVD allows one to search for astrophysical neutrinos with flux values measured by IceCube already at early phases of the array construction. We present here preliminary results of the search for high-energy neutrinos via the cascade mode with the Baikal-GVD neutrino telescope.

46. Neutrino Telescope in Lake Baikal: Present and Future

Author

M.N. Sorokovikov, M.B. Milenin, N. M. Budnev, A.V. Korobchenko, Evgenii V Rjabov, Mark Shelepov, A. V. Skurikhin, V.B. Brudanin, A.V. Avrorin, N.S. Gorshkov, M.V. Kruglov, V.F. Kulepov, R. R. Mirgazov, G.B. Safronov, Rastislav Dvornický, V. M. Aynutdinov, K.V. Golubkov, T. I. Gress, Sergey Yakovlev, Aleksandr Gafarov, Lukas Fajt, S.V. Fialkovsky, E. O. Sushenok, B.A. Tarashansky, M.M. Kolbin, A.D. Avrorin, G.V. Domogatsky, V.D. Rushay, I. A. Belolaptikov, Konstantin Kebkal, K.V. Konischev, V. Nazari, E.N. Pliskovsky, A.P. Koshechkin, D. P. Petukhov, A. A. Doroshenko, Zh.-A.M. Dzhilkibaev, A. I. Panfilov, O.G. Kebkal, M.I. Rozanov, A.G. Solovjev, B.A. Shaybonov, A. N. Dyachok, R. Bannash, Evgeny V. Khramov, I. Stekl, R. Ivanov, V.A. Tabolenko, A.V. Kozhin, Olga Suvorova, M.K. Kryukov, and Fedor Šimkovic

Subjects
Physics, COSMIC cancer database, Physics::Instrumentation and Detectors, Gravitational wave, Astrophysics::High Energy Astrophysical Phenomena, Neutrino telescope, Astrophysics::Instrumentation and Methods for Astrophysics, Northern Hemisphere, Astronomy, Physics::Geophysics, Relativistic particle, High Energy Physics::Experiment, Neutrino, Effective volume
Abstract

A significant progress in the construction and operation of the Baikal Gigaton Volume Detector in Lake Baikal, the largest and deepest freshwater lake in the world, is reported. The effective volume of the detector for neutrino initiated cascades of relativistic particles with energy above 100 TeV has been increased up to about 0.25 km3. This unique scientific facility, the largest operating neutrino telescope in Northern Hemisphere, allows already to register two to three events per year from astrophysical neutrinos with energies exceeding 100 TeV. Preliminary results obtained with data recorded in 2016-2018 are announced. Multimessenger approach is used to relate finding of cosmic neutrinos with those of classical astronomers, with X-ray or gamma-ray observations and the gravitational wave events.

47. A positioning system for Baikal-GVD

Author

A.V. Avrorin, A.V. Korobchenko, Mark Shelepov, Zhan-Arys Magysovich Dzhilkibaev, B.A. Shaybonov, A.P. Koshechkin, G.B. Safronov, A. N. Dyachok, Rastislav Dvornický, M.V. Kruglov, A. I. Panfilov, Evgeny V. Khramov, R. R. Mirgazov, O.G. Kebkal, A.V. Kozhin, R. Bannash, K.V. Golubkov, Olga Suvorova, M.I. Rozanov, V.F. Kulepov, Evgenii V Rjabov, A.G. Solovjev, B.A. Tarashansky, A. V. Skurikhin, N.S. Gorshkov, V. M. Aynutdinov, E.N. Pliskovsky, Sergey Yakovlev, N. M. Budnev, I. Stekl, R. Ivanov, V.A. Tabolenko, M.K. Kryukov, Aleksandr Gafarov, K.V. Konischev, D. P. Petukhov, T. I. Gress, A. A. Doroshenko, Lukas Fajt, M.N. Sorokovikov, M.M. Kolbin, M.B. Milenin, S.V. Fialkovsky, E. O. Sushenok, V.D. Rushay, V.B. Brudanin, I. A. Belolaptikov, V. Nazari, Konstantin Kebkal, A.D. Avrorin, G.V. Domogatsky, and Fedor Šimkovic

Subjects
Spatial positioning, Timing error, Positioning system, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Detector, Neutrino telescope, Astrophysics::Instrumentation and Methods for Astrophysics, Photodetector, Neutrino, Geology, Cherenkov radiation, Remote sensing
Abstract

A cubic kilometer scale neutrino telescope Baikal-GVD is currently under construction in Lake Baikal. Baikal-GVD is designed to detect Cerenkov radiation from products of astrophysical neutrino interactions with Baikal water by a lattice of photodetectors submerged between the depths of 1275 and 730 m. The detector components are mounted on flexible strings and can drift from their initial positions upwards to tens of meters. This introduces positioning uncertainty which translates into a timing error for Cerenkov signal registration. A spatial positioning system has been developed to resolve this issue. In this contribution, we present the status of this system, results of acoustic measurements and an estimate of positioning error for an individual component.

48. Recent progress of the Baikal-GVD project

Author

Mikhail Kuzmich Kryukov, Aleksandr Gafarov, B.A. Tarashansky, K.V. Konischev, A.D. Avrorin, G.V. Domogatsky, R. R. Mirgazov, A. A. Doroshenko, Alexei Gennadevich Solovjev, G.B. Safronov, Mark Shelepov, Vladimir Dmitrievich Rushay, Vahab Nazari, V.M. Aynutdinov, Maksim Viktorovich Kruglov, I. A. Belolaptikov, Konstantin Kebkal, Vicktor Fedorovich Kulepov, Ivan Štekl, Andrei Petrovich Koshechkin, Andrei Ivanovich Panfilov, Zhan-Arys Magysovich Dzhilkibaev, Fedor Šimkovic, E.N. Pliskovsky, Evgenii V Rjabov, R. Bannash, Euvgenii Vladimirovich Khramov, Dmitrii Petrovich Petukhov, S.V. Fialkovsky, T. I. Gress, M.I. Rozanov, Lukas Fajt, Maksim Nikolaevich Sorokovnikov, A.V. Skurihin, V.A. Tabolenko, A.V. Korobchenko, Euvgenii Olegovich Sushenok, M.M. Kolbin, V.B. Brudanin, N. M. Budnev, K.V. Golubkov, Родион Andreevich Ivanov, Oleksiy Geogievich Kebkal, Sergey Yakovlev, V. A. Kozhin, M.B. Milenin, B.A. Shaybonov, A. N. Dyachok, Aleksandr Valentinovich Avrovin, Rastislav Dvornicky, Olga Suvorova, and Nikita Sergeevich Gorshkov

Subjects
Shore, Physics, geography, geography.geographical_feature_category, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Detector, Neutrino telescope, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, law.invention, Relativistic particle, Telescope, law, Cluster (physics), High Energy Physics::Experiment, Neutrino, Effective volume
Abstract

Cubic kilometer scale neutrino telescope Baikal-GVD is currently under construction in Lake Baikal. The detector is specially designed for search for high energies neutrinos whose sources are not yet reliably identified. Since April 2019 the telescope has been successfully operated in complex of five functionally independent clusters i.e. sub-arrays of optical modules where now are hosted 1440 OMs on 40 vertical strings. Each cluster is connected to shore by individual electro-optical cables. The effective volume of the detector for neutrino initiated cascades of relativistic particles with energy above 100 TeV has been increased up to about 0.25 km$^3$. Preliminary results with data samples of 2015-2018 years are discussed.

49. The Baikal-GVD detector calibrations

Author

A.P. Koshechkin, V. Nazari, K.V. Konischev, Mark Shelepov, Evgeniy Khramov, I. A. Belolaptikov, Konstantin Kebkal, N. M. Budnev, A.V. Avrorin, M.B. Milenin, M.N. Sorokovikov, B.A. Shaybonov, A. N. Dyachok, B.A. Tarashansky, D. P. Petukhov, Evgenii V Rjabov, K.V. Golubkov, R. Bannash, A. V. Skurikhin, I. Stekl, R. Ivanov, V.A. Tabolenko, A.V. Korobchenko, A.D. Avrorin, A.V. Kozhin, G.V. Domogatsky, E.N. Pliskovsky, Olga Suvorova, Aleksandr Gafarov, A. A. Doroshenko, R. R. Mirgazov, V. M. Aynutdinov, Zh.-A.M. Dzhilkibaev, Sergey Yakovlev, M.K. Kryukov, N.S. Gorshkov, V.D. Rushay, A. I. Panfilov, V. B. Brudanin, T. I. Gress, O.G. Kebkal, V.F. Kulepov, M.I. Rozanov, Lukas Fajt, Fedor Šimkovic, A.G. Solovjev, M.M. Kolbin, G.B. Safronov, Rastislav Dvornický, M.V. Kruglov, S.V. Fialkovsky, and E. O. Sushenok

Subjects
Detector, Neutrino telescope, Calibration, Volume (computing), Environmental science, Remote sensing
Abstract

In April 2019, the Baikal-GVD collaboration finished the installation of the fourth and fifth clusters of the neutrino telescope Baikal-GVD. Momentarily, 1440 Optical Modules (OM) are installed in the largest and deepest freshwater lake in the world, Lake Baikal, instrumenting 0.25 km3 of sensitive volume. The Baikal-GVD is thus the largest neutrino telescope on the Northern Hemisphere. The first phase of the detector construction is going to be finished in 2021 with 9 clusters, 2592 OMs in total, however the already installed clusters are stand-alone units which are independently operational and taking data from their commissioning. Huge number of channels as well as strict requirements for the precision of the time and charge calibration (ns, p.e.) make calibration procedures vital and very complex tasks. The inter cluster time calibration is performed with numerous calibration systems. The charge calibration is carried out with a Single Photo-Electron peak. The various data acquired during the last three years in regular and special calibration runs validate successful performance of the calibration systems and of the developed calibration techniques. The precision of the charge calibration has been improved and the time dependence of the obtained calibration parameters have been cross-checked. The multiple calibration sources verified a 1.5 - 2.0 ns precision of the in-situ time calibrations. The time walk effect has been studied in detail with in situ specialized calibration runs.

50. Data quality monitoring system in the Baikal-GVD experiment

Author

Aleksandr Gafarov, D. P. Petukhov, A.V. Kozhin, Olga Suvorova, Evgenii V Rjabov, V.D. Rushay, K.V. Golubkov, E.N. Pliskovsky, N. M. Budnev, R. R. Mirgazov, M.K. Kryukov, V.F. Kulepov, A.P. Koshechkin, T. I. Gress, I. A. Belolaptikov, Konstantin Kebkal, B.A. Shaybonov, B.A. Tarashansky, A.V. Korobchenko, Mark Shelepov, Lukas Fajt, A. N. Dyachok, R. Bannash, M.V. Kruglov, Evgeny V. Khramov, K.V. Konischev, V.B. Brudanin, A. I. Panfilov, O.G. Kebkal, M.M. Kolbin, A. A. Doroshenko, A.D. Avrorin, M.I. Rozanov, I. Stekl, R. Ivanov, Zh.-A.M. Dzhilkibaev, A.G. Solovjev, G.V. Domogatsky, A. V. Skurikhin, V.A. Tabolenko, V. Nazari, V. M. Aynutdinov, M.B. Milenin, Sergey Yakovlev, M.N. Sorokovikov, Fedor Šimkovic, G.B. Safronov, Rastislav Dvornický, A.V. Avrorin, N.S. Gorshkov, S.V. Fialkovsky, and E. O. Sushenok

Subjects
Quality (physics), Computer science, Data quality, Real-time computing, Detector, Experimental data, Monitoring system, Point (geometry)
Abstract

The quality of the incoming experimental data has a significant importance for both analysis and running the experiment. The main point of the Baikal-GVD DQM system is to monitor the status of the detector and obtained data on the run-by-run based analysis. It should be fast enough to be able to provide analysis results to detector shifter and for participation in the global multimessenger system.

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