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1. Microwave Setup of a Megawatt Power Level for the ECR Plasma Heating and Current Drive System of the T-15MD Tokamak

Author

Mikhail I. Bakulin, I. S. Baber, I. I. Leonov, K. A. Zhurin, P. P. Khvostenko, A. G. Eremeev, Gregory G. Denisov, A. V. Chirkov, E. A. Kopelovich, M. Yu. Glyavin, M. V. Kuznetsov, V. I. Malygin, B. Z. Movshevich, N. A. Kirneva, V. I. Belousov, Alexander I. Tsvetkov, E. M. Tai, E. A. Soluyanova, M. M. Troitskiy, N. I. Karpov, I. A. Varygin, I.O. Anashkin, M. Yu. Shmelev, and I. N. Roy

Subjects
Physics, Nuclear and High Energy Physics, Tokamak, Nuclear engineering, Response time, Astronomy and Astrophysics, Statistical and Nonlinear Physics, 01 natural sciences, Aspect ratio (image), 010305 fluids & plasmas, Electronic, Optical and Magnetic Materials, Power (physics), law.invention, Magnetic field, law, Transmission line, Gyrotron, 0103 physical sciences, Electrical and Electronic Engineering, 010306 general physics, Microwave
Abstract

As part of the creation of a unique T-15MD tokamak with a magnetic field of 2 T and an aspect ratio of 2.2, the first one of a series (8 pieces) of microwave setups of a megawatt power level for electron–cyclotron plasma heating and current drive was developed and successfully tested. The setup includes a gyrotron, power supplies, a microwave radiation transmission line, and a fast (response time is no more than 10 μs) gyrotron emergency protection system. The generation regime was experimentally demonstrated with the parameters 1 MW/30 s/82.6 GHz for an efficiency of 57%.

Published
2020

2. TAIGA: A Complex of Hybrid Systems of Cooperating Detectors for Gamma Astronomy and Cosmic Ray Physics in the Tunka Valley

Author

Evgeny Postnikov, Roman Raikin, O. A. Gress, A. A. Grinyuk, V. A. Kozhin, V. V. Kindin, V. Samoliga, V. A. Poleschuk, M. Slunecka, Bayarto Lubsandorzhiev, A. Chiavassa, R. R. Mirgazov, V. S. Ptuskin, R. Mirzoyan, A. Yu. Garmash, V. Prosin, L. A. Kuzmichev, V. M. Grebenyuk, Anatoly Lagutin, Oleg Fedorov, M. Kunnas, L. V. Pankov, E. A. Osipova, Pavel Bezyazeekov, A. A. Petrukhin, Aleksandr Gafarov, Mihai Popescu, R. Wischnewski, A. A. Silaev, M. Tluczykont, A. V. Skurikhin, A. Borodin, Mikhail Panasyuk, R. D. Monkhoev, T. I. Gress, Aleksey Zagorodnikov, A. V. Tkachenko, Dieter Horns, N. B. Lubsandorzhiev, N. V. Gorbunov, Dmitry Zhurov, A. Ivanova, L. G. Sveshnikova, A. Tanaev, I. I. Yashin, N. I. Karpov, E.G. Popova, O. G. Grishin, A. N. Dyachok, R. Nakhtigal, A. Pakhorukov, L. G. Tkachev, V.A. Tabolenko, Y. Sagan, K. G. Kompaniets, A. Porelli, Valery Zurbanov, A. Pushnin, E. A. Kravchenko, A. Yu. Sidorenkov, E. E. Korosteleva, S. Kiryuhin, R. P. Kokoulin, V. P. Sulakov, B.A. Tarashansky, Y. Kazarina, P. Kirilenko, Andrey Sokolov, N. M. Budnev, V. V. Lenok, Grigory Rubtsov, N. N. Kalmykov, C. Spiering, and I. I. Astapov

Subjects
010302 applied physics, COSMIC cancer database, 010308 nuclear & particles physics, Observatory, 0103 physical sciences, Detector, Taiga, Gamma ray detectors, General Physics and Astronomy, Astronomy, Cosmic ray, Radiation, 01 natural sciences
Abstract

The relevance and benefits of the new TAIGA gamma observatory complex in the Tunka Valley (50 km from Lake Baikal) are discussed. The main aim of the TAIGA installation is to study high-energy gamma radiation and search for cosmic pevatrons. The first series of gamma stations was commissioned in 2019 and covers an area of 1 km2. Its expected integral gamma radiation sensitivity at an energy of 100 TeV over 300 h of source monitoring is (2–5) × 10−13 TeV cm−2 s−1. It is planned to expand the effective area of TAIGA gamma observation to 10 km2 in the future.

Published
2019

3. Application of New Approximations of the Lateral Distribution of EAS Cherenkov Light in the Atmosphere

Author

R. R. Mirgazov, V. A. Poleschuk, N. B. Lubsandorzhiev, Oleg Fedorov, A. Pakhorukov, L. G. Tkachev, Evgeny Postnikov, A. V. Tkachenko, M. Slunecka, Bayarto Lubsandorzhiev, A. Borodin, Andrey Sokolov, E.G. Popova, O. A. Gress, L. G. Sveshnikova, Y. Sagan, R. D. Monkhoev, T. I. Gress, E. A. Osipova, V. V. Lenok, A. N. Dyachok, P. S. Kirilenko, O. G. Grishin, Pavel Bezyazeekov, V. Boreyko, M. Tluczykont, V. A. Kozhin, V. V. Kindin, K. G. Kompaniets, A. V. Skurikhin, R. Nachtigall, A. Porelli, R. Mirzoyan, A. Pushnin, L. V. Pankov, Valery Zurbanov, N. V. Gorbunov, B.A. Tarashansky, A. A. Lagutin, Roman Raikin, Aleksandr Gafarov, I. I. Yashin, V. P. Sulakov, M. Popesku, Dieter Horns, A. Sidorenkov, A. A. Grinyuk, A. A. Silaev, Yu. A. Semeney, V. Samoliga, C. Spiering, Mikhail Panasyuk, Aleksey Zagorodnikov, M. Kunnas, V. S. Ptuskin, A. Chiavassa, E. A. Kravchenko, V. Prosin, A. Ivanova, N. I. Karpov, R. Wischnewski, L. A. Kuzmichev, V. M. Grebenyuk, A. A. Petrukhin, A. Sh. M. Elshoukrofy, Yulia Kazarina, N. M. Budnev, S. Kiryuhin, V.A. Tabolenko, E. E. Korosteleva, A. Garmash, Hussein A. Motaweh, R. P. Kokoulin, I. I. Astapov, Grigory Rubtsov, and N. N. Kalmykov

Subjects
Physics, Nuclear and High Energy Physics, Photon, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Cosmic ray, Probability density function, 01 natural sciences, Electromagnetic radiation, Atomic and Molecular Physics, and Optics, Computational physics, Massless particle, Distribution function, 0103 physical sciences, Range (statistics), 010303 astronomy & astrophysics, Cherenkov radiation
Abstract

A new knee-like approximation of the lateral distribution function (LDF) of EAS Cherenkov light in the 30–3000 TeV energy range was proposed and tested with simulated showers in our earlier studies. This approximation fits the LDFs of individual showers accurately for all types of primary particles gamma-rays, protons, and nuclei) and is suitable for reconstructing the shower core, determining the energy, and separating gamma-induced showers from hadron-induced ones. In the present study, the knee-like fitting function is used to determine the parameters of real showers detected by TAIGA-HiSCORE. It is demonstrated that this approximation characterizes properly all types of individual LDFs of experimental events in the 300–1000 TeV range. The accuracy of fit is governed by fluctuations intrinsic to the process of measurement of the Cherenkov photon density. The probability density function of these fluctuations was reconstructed and introduced into simulations. Certain useful methodical applications of the knee-like approximation are con-sidered, and the possibility of shower sorting into nuclei groups is examined. The extensive statistical coverage and detailed LDF measurement data of HiSCORE have provided the first opportunity to examine in depth the LDF of Cherenkov radiation in the 300–1000 TeV range.

Published
2018

4. TAIGA Gamma Observatory: Status and Prospects

Author

M. Kunnas, Roman Raikin, Aleksey Zagorodnikov, A. A. Grinyuk, K. G. Kompaniets, V. Samoliga, A. V. Skurikhin, Evgeny Postnikov, A. N. Dyachok, Y. Sagan, B.A. Tarashansky, S. Kiryuhin, L. A. Kuzmichev, R. Wischnewski, V. M. Grebenyuk, L. V. Pankov, M. Slunecka, N. B. Lubsandorzhiev, Bayarto Lubsandorzhiev, A. V. Tkachenko, R. D. Monkhoev, T. I. Gress, V. A. Poleschuk, M. Popesku, L. G. Sveshnikova, V. S. Ptuskin, R. Nachtigall, E. A. Osipova, A. Chiavassa, V. Prosin, N. I. Karpov, O. A. Gress, M. Tluczykont, Pavel Bezyazeekov, V. Boreyko, O. G. Grishin, V. A. Kozhin, A. Pakhorukov, V. V. Kindin, L. G. Tkachev, Aleksandr Gafarov, N. V. Gorbunov, A. A. Silaev, Valery Zurbanov, A. Pushnin, R. R. Mirgazov, Oleg Fedorov, A. Borodin, E. A. Kravchenko, A. A. Petrukhin, E. E. Korosteleva, A. Sh. M. Elshoukrofy, A. Ivanova, Yulia Kazarina, A. Garmash, R. P. Kokoulin, V.A. Tabolenko, E.G. Popova, V. P. Sulakov, Yu. A. Semeney, A. D. Horns, V. V. Lenok, A. Porelli, P. Kirilenko, C. Spiering, Andrey Sokolov, I. I. Yashin, A. Sidorenkov, Anatoly Lagutin, Grigory Rubtsov, N. N. Kalmykov, I. I. Astapov, N. M. Budnev, R. Mirzoyan, and Mikhail Panasyuk

Subjects
Physics, Nuclear and High Energy Physics, Muon, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Astronomy, IACT, Cosmic ray, 01 natural sciences, Atomic and Molecular Physics, and Optics, Particle detector, Observatory, 0103 physical sciences, Measuring instrument, 010303 astronomy & astrophysics, Cherenkov radiation
Abstract

Over the past few years, the TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma-ray Astronomy) observatory has been being deployed in the Tunka Valley, Republic of Buryatia. It is designed for studying gamma rays of energy above 30 TeV and performing searches for sources of galactic cosmic rays with energies in the vicinity of 1 PeV, which is an energy region around the classic knee in the cosmic-ray energy spectrum. The first phase of the observatory will be situated at a distance of about 50 km from Lake Baikal at the site of the Tunka-133 array. The TAIGA gamma observatory will include a network of 500 wide-angle (0.6 sr) Cherenkov detectors (TAIGA-HiSCORE array) and up to 16 atmospheric Cherenkov telescopes (ACT) designed for analyzing the EAS images (imaging atmospheric Cherenkov telescopes, or IACT) and positioned within an area of 5 km2. The observatory will also include muon detectors of total area 2000 m2 distributed over an area of 1 km2. Within the next three years, it is planned to enhance the area of the TAIGA-HiSCORE array by a factor of four—from 0.25 km2 to 1 km2; to supplement the existing IACT with two new ones; and to deploy new muon detectors with a total coverage of 200 m2. The structure of the new observatory is described along with the data analysis techniques used. The most interesting physical results are presented, and the research program for the future is discussed.

Published
2018

5. The TAIGA-HiSCORE array prototype: Status and first results

Author

I. I. Astapov, N. S. Barbashina, A. G. Bogdanov, V. Boreyko, N. M. Budnev, R. Wischnewski, A. R. Gafarov, V. Grebenyuk, O. A. Gress, T. I. Gress, A. A. Grinyuk, O. G. Grishin, N. Gorbunov, A. N. Dyachok, S. N. Epimakhov, A. V. Zagorodnikov, V. L. Zurbanov, A. L. Ivanova, Y. A. Kazarina, N. N. Kalmykov, N. I. Karpov, V. V. Kindin, S. N. Kiryuhin, R. P. Kokoulin, K. G. Kompaniets, E. E. Korosteleva, V. A. Kozhin, E. Kravchenko, M. Kunnas, L. A. Kuzmichev, A. Chiavassa, V. V. Lenok, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, R. R. Mirgazov, R. Mirzoyan, R. D. Monkhoev, R. Nachtigall, A. L. Pakhorukov, E. A. Osipova, M. I. Panasyuk, L. V. Pankov, A. A. Petrukhin, M. Popescu, A. Porelli, A. A. Pushnin, V. A. Poleschuk, E. G. Popova, E. B. Postnikov, V. V. Prosin, V. S. Ptuskin, G. I. Rubtsov, V. S. Samoliga, Y. A. Semeney, A. A. Silaev, A. V. Skurikhin, L. G. Sveshnikova, A. Sokolov, V. A. Tabolenko, B. A. Tarashchansky, L. G. Tkachev, A. V. Tkachenko, M. Tluczykont, O. L. Fedorov, D. Horns, C. Spiering, K. Yurin, and I. I. Yashin

Subjects
010308 nuclear & particles physics, Observatory, 0103 physical sciences, Taiga, Gamma ray, General Physics and Astronomy, 010303 astronomy & astrophysics, 01 natural sciences, Geology, Remote sensing
Abstract

The design for the TAIGA-HiSCORE array, a part of the TAIGA Gamma Ray Observatory, is considered. The observatory is being constructed in the Tunka Valley, 50 km from Lake Baikal. Preliminary results obtained using the first 28 optical stations of the array are presented.

Published
2017

6. First results from the operation of the prototype Tunka-HiSCORE array

Author

S. F. Berezhnev, N. M. Budnev, M. Büker, M. Brückner, R. Wischnewski, A. V. Gafarov, O. A. Gress, T. Gress, A. N. Dyachok, S. N. Epimakhov, A. V. Zagorodnikov, V. L. Zurbanov, N. N. Kalmykov, N. I. Karpov, E. N. Konstantinov, E. E. Korosteleva, V. A. Kozhin, M. Kunnas, L. A. Kuzmichev, A. Chiavassa, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, R. R. Mirgazov, R. D. Monkhoev, R. Nachtigall, A. L. Pakhorukov, M. I. Panasyuk, L. V. Pankov, A. Porelli, V. A. Poleshchuk, E. G. Popova, V. V. Prosin, V. S. Ptuskin, M. Rueger, G. I. Rubtsov, Yu. A. Semeney, A. A. Silaev, A. V. Skurikhin, L. G. Sveshnikova, M. Tluczykont, D. Hampf, D. Horns, and O. A. Chvalaev

Subjects
Physics, Data processing, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, General Physics and Astronomy, Astronomy, Cosmic ray, Differential spectrum, Observatory, Angle of arrival, Cherenkov radiation, Energy (signal processing), Remote sensing
Abstract

The Tunka-HISCORE wide-angle Cherenkov array, one part of the planned TAIGA integrated gamma observatory intended for investigations in the field of high-energy (>30 TeV) gamma-ray astronomy and cosmic-ray physics, is deployed in the Tunka Valley (Buryat Republic). The first results from operating a prototype array composed of nine stations spread over an area of ∼0.1 square kilometers during the winter of 2013–2014 are presented. Data processing techniques are described, along with data on the accuracy of reconstructing the position of a shower’s axis, energy, and angle of arrival. The differential spectrum of all cosmic-ray particles in a shower in the energy range of 2 × 1014 to 2 × 1016 eV is presented and compared to the available data.

Published
2015

7. Energy spectrum and mass composition of cosmic rays, by the data of the Tunka-133 array

Author

S. F. Berezhnev, N. M. Budnev, O. A. Gress, A. N. Dyachok, S. N. Epimakhov, A. V. Zagorodnikov, N. N. Kalmykov, N. I. Karpov, V. A. Kozhin, E. N. Konstantinov, A. V. Korobchenko, E. E. Korosteleva, L. A. Kuzmichev, A. Chiavassa, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, R. R. Mirgazov, R. D. Monkhoev, E. A. Osipova, M. I. Panasyuk, L. V. Pankov, A. L. Pakhorukov, E. G. Popova, V. V. Prosin, V. S. Ptuskin, L. G. Sveshnikova, Yu. A. Semeney, A. A. Silaev, A. V. Skurikhin, O. A. Chvalaev, C. Spiering, and I. V. Yashin

Subjects
Core (optical fiber), Physics, Range (particle radiation), Air shower, Primary energy, General Physics and Astronomy, Direction of arrival, Cosmic ray, Astrophysics, Energy (signal processing), Cherenkov radiation, Computational physics
Abstract

The Tunka-133 Cherenkov light array for the detection of extensive air showers (EAS) acquires data over the five winters from 2009 to 2014. The direction of arrival, the shower core coordinates on the plane of observation, the primary energy, and the depth of the shower maximum are reconstructed for each EAS. A differential all-particle energy spectrum is obtained in the energy range of 6 × 1015–3 × 1018 eV over 1540 h, along with the energy dependence of the average depth of the shower maximum in the range of 6 × 1016–3 × 1018 eV. Based on this dependence, the variation in the average composition of the primary cosmic rays is estimated as a function of energy.

Published
2015

8. The Primary CR Spectrum by the Data of the Tunka-133 Array

Author

S. F. Berezhnev, N. M. Budnev, A. Chiavassa, O. A. Chvalaev, O. A. Gress, T. I. Gress, A. N. Dyachok, S. N. Epimakhov, N. I. Karpov, N. N. Kalmykov, E. N. Konstantinov, A. V. Korobchenko, E. E. Korosteleva, V. A. Kozhin, L. A. Kuzmichev, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, R. R. Mirgazov, R. D. Monkhoev, E. A. Osipova, A. L. Pakhorukov, M. I. Panasyuk, L. V. Pankov, E. G. Popova, V. V. Prosin, V. S. Ptuskin, Yu. A. Semeney, A. A. Silaev, A. V. Skurikhin, C. Spiering, L. G. Sveshnikova, and A. V. Zagorodnikov

Subjects
Physics, Data acquisition, Calibration (statistics), Primary (astronomy), Energy spectrum, Astronomy, Astrophysics, Spectrum (topology)
Published
2016

9. Results and perspectives of cosmic ray mass composition studies with EAS arrays in the Tunka Valley

Author

V V Prosin, N M Budnev, A Chiavassa, A N Dyachok, S N Epimakhov, F Fenu, Yu A Fomin, O A Gress, T I Gress, N N Kalmykov, N I Karpov, E E Korosteleva, V A Kozhin, L A Kuzmichev, B K Lubsandorzhiev, N B Lubsandorzhiev, R R Mirgazov, R D Monhoev, E A Osipova, M I Panasyuk, L V Pankov, E G Popova, V S Ptuskin, Yu A Semeney, A A Silaev, A V Skurikhin, C Spiering, V P Sulakov, L G Sveshnikova, and A V Zagorodnikov

Subjects
Physics, History, Scintillation, Range (particle radiation), 010308 nuclear & particles physics, Detector, Cosmic ray, Astrophysics, 01 natural sciences, Particle detector, Charged particle, Computer Science Applications, Education, Nuclear physics, 0103 physical sciences, Measuring instrument, 010306 general physics, Cherenkov radiation
Abstract

The study of the cosmic ray mass composition in the energy range 1016 - 1018 eV is one of the main aims of Tunka-133. This EAS Cherenkov array started data acquisition in the Tunka Valley (50 km from Lake Baikal) in autumn 2009. Tunka-133 provides a measurement of the EAS maximum depth (Xmax) with an accuracy of about 30 g/cm2 . Further mass composition analyses at the highest energies (1017 - 1018 eV) will be based on the comparison of primary energy measured by the radio method and the densities of charged particles measured by shielded and unshielded detectors. The high duty cycle of the common operation of the new scintillation array (Tunka-Grande) and the radio extension of the experiment (Tunka-REX) will provide a high statistics of events.

Published
2016

10. The Taiga project

Author

I I Yashin, I I Astapov, N S Barbashina, A G Bogdanov, V Boreyko, N M Budnev, M Büker, M Bruckner, A Chiavassa, O B Chvalaev, A V Gafarov, N Gorbunov, V Grebenyuk, O A Gress, A Grinyuk, O G Grishin, A N Dyachok, S N Epimakhov, T V Eremin, D Horns, A L Ivanova, N N Kalmykov, N I Karpov, Y A Kazarina, V V Kindin, N V Kirichkov, S N Kiryuhin, R P Kokouli, K G Kompaniets, E N Konstantinov, A V Korobchenko, E E Korosteleva, V A Kozhin, M Kunnas, L A Kuzmichev, V V Lenok, B K Lubsandorzhiev, N B Lubsandorzhiev, R R Mirgazov, R Mirzoyan, R D Monkhoev, R Nachtigall, A L Pakhorukov, M I Panasyuk, L V Pankov, A A Perevalov, A A Petrukhin, V A Platonov, V A Poleschuk, M Popescu, E G Popova, A Porelli, V V Prosin, V S Ptuskin, G I Rubtsov, M Rueger, V G Rybov, V S Samoliga, P S Satunin, A Saunkin, V Yu Savinov, Yu A Semeney, B A Shaibonov, A A Silaev, A V Skurikhin, M Slunecka, C Spiering, L G Sveshnikova, V A Tabolenko, A Tkachenko, L G Tkachev, M Tluczykont, A D Veslopopov, E P Veslopopova, D M Voronov, R Wischnewski, K O Yurin, A V Zagorodnikov, V N Zirakashvili, and V L Zurbanov

Subjects
Physics, History, Range (particle radiation), Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Taiga, Detector, Cosmic ray, Astrophysics, 01 natural sciences, Particle detector, Computer Science Applications, Education, 0103 physical sciences, High Energy Physics::Experiment, Ultrahigh energy, 010306 general physics, Cherenkov radiation, Muon detector
Abstract

The TAIGA project is aimed at solving the fundamental problems of gamma-ray astronomy and physics of ultrahigh energy cosmic rays with the help of the complex of detectors, located in the Tunka valley (Siberia, Russia). TAIGA includes a wide-angle large area Tunka-HiSCORE array, designed to detect gamma-rays of ultrahigh energies in the range 20 - 1000 TeV and charged cosmic rays with energies of 100 TeV - 100 PeV, large area muon detector to improve the rejection of background EAS protons and nuclei and a network of imaging atmospheric Cherenkov telescopes for gamma radiation detection. We discuss the goals and objectives of the complex features of each detector and the results obtained in the first stage of the HiSCORE installation.

Published
2016

11. Results from Tunka-133 (5 years observation) and from the Tunka-HiSCORE prototype

Author

Yu. A. Semeney, A. Pakhorukov, A. V. Skurikhin, V. A. Poleschuk, R. Nachtigall, O. A. Gress, A. V. Gafarov, M. Kunnas, A.V. Zurbanov, A. Porelli, S. Kiryuhin, Dieter Horns, V. A. Kozhin, C. Spiering, Bayarto Lubsandorzhiev, M. Tluczykont, M. I. Panasyuk, M. Rüger, A.V. Dyachok, L. G. Sveshnikova, A. Chiavassa, V. Prosin, S. F. Berezhnev, A.V. Korobchenko, S. Epimakhov, V. S. Ptuskin, E. E. Korosteleva, L. V. Pankov, R. D. Monkhoev, T. I. Gress, Aleksey Zagorodnikov, N. B. Lubsandorzhiev, N. I. Karpov, Grigory Rubtsov, N. N. Kalmykov, N. M. Budnev, L. A. Kuzmichev, A. A. Silaev, R. Wischnewski, E. N. Konstantinov, E.G. Popova, R. R. Mirgazov, V. Samoliga, O.A. Chvalaev, M. Brückner, and E. A. Osipova

Subjects
Physics, 010308 nuclear & particles physics, Maximum depth, QC1-999, 0103 physical sciences, Energy spectrum, Cosmic ray, Astrophysics, 010306 general physics, 01 natural sciences, Cherenkov radiation, Remote sensing
Abstract

Data obtained with two detectors located at the Tunka Cosmic Ray facility are presented. The Cherenkov light array for registration of extensive air showers (EAS) Tunka-133 collected data during 5 winter seasons since 2009 to 2014. The differential energy spectrum of all particles and the dependence of the average maximum depth on the energy in the range of 6 · 10 15 −10 18 eV measured for 1540 hours of observation are presented.The preliminary all particle energy spectrum by the data of Tunka-HiSCORE prototype array, installed in 2013, is presented. Some additional experiments in the Tunka Valley are briefly described.

Published
2016

12. The hardware of the HiSCORE γ-ray and cosmic ray Cherenkov detector

Author

M. Kunnas, R. Nachtigall, S. N. Epimakhov, M. Tluczykont, L. A. Kuzmichev, S. F. Berezhnev, N. M. Budnev, M. Büker, A. Chiavassa, O. B. Chvalaev, O. A. Gress, A. N. Dyachok, U. Einhaus, D. Hampf, D. Horns, A. Ivanova, N. I. Karpov, N. N. Kalmykov, E. N. Konstantinov, A. V. Korobchenko, E. E. Korosteleva, V. A. Kozhin, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, R. R. Mirgazov, A. Pakhorukov, M. I. Panasyuk, L. V. Pankov, V. Poleschuk, E. G. Popova, V. V. Prosin, V. S. Ptuskin, G. P. Rowell, Yu. A. Semeney, B. A. Shaibonov (junior), A. A. Silaev, A. A. Silaev (junior), A. V. Skurikhin, C. Spiering, L. G. Sveshnikova, R. Wischnewski, I. V. Yashin, and A. V. Zagorodnikov

Subjects
Physics, Photomultiplier, COSMIC cancer database, business.industry, Cherenkov detector, Gamma ray, Astronomy, Single station, Cosmic ray, First light, law.invention, Air shower, law, business, Computer hardware
Abstract

The HiSCORE (Hundred Square km Cosmic ORigin Explorer) project is a ground-based large-area wideangle air shower detector array that will measure gamma rays and cosmic rays in the energy range of 10 TeV up to 1EeV. Each detector array station consists of four separate light collectors with an 8-inch photomultiplier (PMT) at each end. The first station prototype has already been deployed to Tunka valley. On-site station integration and first measurements have been made. This poster will focus on the hardware aspects and the first light results of the single station.

Published
2012

13. Tunka-133: the New EAS Cherenkov Light Array for Cosmic Ray Study

Author

Yu. A. Semeney, B. A. M. Shaibonov, L. G. Sveshnikova, B. V. Antokhonov, V. S. Ptuskin, E. N. Konstantinov, C. Spiering, A. Chiavassa, S. F. Berezhnev, O. A. Gress, I. V. Yashin, L. V. Pankov, J. Snyder, V. A. Kozhin, M. Stockham, B. K. Lubsandorzhiev, N. N. Kalmykov, V. V. Prosin, A. V. Skurikhin, N. M. Budnev, M. I. Panasyuk, R. R. Mirgazov, A. V. Zablotsky, A.V. Korobchenko, A. N. Dyachok, E.G. Popova, A. A. Silaev, A. V. Zagorodnikov, N. I. Karpov, O. A. Chvalaiev, E. E. Korosteleva, D. Z. Besson, L. A. Kuzmichev, and R. Wischnewski

Subjects
Physics, Astronomy, Cosmic ray, Cherenkov radiation
Published
2011

14. TUNKA-133: A new array for the study of ultra-high energy cosmic rays

Author

B. V. Antokhonov, S. F. Berezhnev, D. Besson, N. M. Budnev, R. Wischnevski, O. A. Gress, A. N. Diachok, A. V. Zablotsky, A. V. Zagorodnikov, N. N. Kalmykov, N. I. Karpov, V. A. Kozhin, E. E. Korosteleva, A. V. Korobchenko, L. A. Kuzmichev, A. Chiavassa, B. K. Lubsandorzhiev, R. R. Mirgazov, M. I. Panasyuk, L. V. Pankov, V. V. Prosin, V. S. Ptuskin, Yu. A. Semeney, A. A. Silaev, A. V. Skurikhin, M. Stokham, O. A. Chvalaiev, B. A. Shaibonov, J. Snyder, Ch. Spiering, and I. V. Yashin

Subjects
Physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, General Physics and Astronomy, Cosmic ray, Ultra-high-energy cosmic ray, Astrophysics, Cherenkov radiation
Abstract

A new array for studying ultra-high energy cosmic rays was inaugurated in 2009 in the Tunka Valley, about 50 km from Lake Baikal. Having an area of 1 km2, the new facility allows us to study cosmic rays with energies of 1015–1018 eV via the a unified method for registering Cherenkov radiation from extensive air showers (EASes) and is making a substantial contribution to understanding the origin of ultra-high energy cosmic rays. We describe the current state of the experiment, the new methodological approach, our initial results, and the plans for further development of the array.

Published
2011

15. Primary CR energy spectrum and mass composition by the data of Tunka-133 array

Author

A. Chiavassa, V. Prosin, A. A. Silaev, A. Pakhorukov, R. D. Monkhoev, T. I. Gress, Bayarto Lubsandorzhiev, L. A. Kuzmichev, N. N. Kalmykov, A. V. Skurikhin, E. N. Konstantinov, V. S. Ptuskin, A.V. Dyachok, E. E. Korosteleva, S. Epimakhov, S. F. Berezhnev, O. A. Gress, A.V. Korobchenko, L. G. Sveshnikova, V. A. Kozhin, O.A. Chvalaev, E. A. Osipova, Mikhail Panasyuk, N. I. Karpov, E.G. Popova, N. M. Budnev, N. B. Lubsandorzhiev, R. R. Mirgazov, L. V. Pankov, C. Spiering, Aleksey Zagorodnikov, Yu. A. Semeney, and Silaev, A. A.

Subjects
Physics, Nuclear physics, Range (particle radiation), Maximum depth, Primary (astronomy), QC1-999, Energy spectrum, ddc:530, Mass composition, Energy (signal processing), Cherenkov radiation
Abstract

The Cherenkov light array for the registration of extensive air showers (EAS) Tunka-133 collected data during 5 winter seasons from 2009 to 2014. The differential energy spectrum of all particles and the dependence of the average maximum depth on the energy in the range of 6 · 10 15 -10 18 eV measured for 1540 hours of observation are presented.

Published
2015

16. Analysis of the vascular abnormalities of the patients with ankle joint mild osteoarthritis

Author

A. O. Mombekov, N. I. Karpovich, O. A. Dogotar, A. V. Dergunov, and N. B. Zagorodnyi

Subjects
ankle joint osteoarthritis, hemodynamic abnormalities, duplex ultrasonography screening, treatment, rehabilitation, Medicine
Abstract

The vascular factor is one of the leading pathogenesis factors in the formation of ankle joint osteoarthritis. Dystrophic and sclerotic changes in the joint tissues develop as a result of blood flow decrease. These mechanisms understanding will allow to plan treatment and rehabilitation measures, as well as predict and prevent complications. The purpose of the work is to study hemodynamic parameters in the main lower leg arteries of the in patients in follow-up period of mild ankle joint osteoarthritis. Two groups of patients were examined. The first group - 82 patients with mild ankle joint osteoarthritis in the follow-up period (10 years) and the second group - control (healthy) group of 58 people without ankle joint osteoarthritis. Duplex scan of the main lower leg arteries was performed to all the patients. The state of arteries and hemodynamic parameters were evaluated. Excell and STATISTICA 10.0 programs were used for statistical data processing. In patients with follow-up of mild ankle joint osteoarthritis, the diameter of the arteries did not differ from the control group. In patients with mild ankle joint osteoarthritis the thickness of the Intima-media complex in the lower leg arteries and walls pulsation were significantly higher than those in patients of the control group (p

Published
2020
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17. TAIGA the Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy — present status and perspectives

Author

N M Budnev, I I Astapov, A G Bogdanov, V Boreyko, M Büker, M Brückner, A Chiavassa, A V Gafarov, O B Chvalaev, N Gorbunov, V Grebenyuk, A Grinyuk, O A Gress, T Gress, A N Dyachok, S N Epimakhov, D Horns, A L Ivanova, N I Karpov, N N Kalmykov, Y A Kazarina, V Kindin, N V Kirichkov, S N Kiryuhin, R P Kokoulin, K G Kompaniets, E N Konstantinov, A V Korobchenko, E E Korosteleva, V A Kozhin, M Kunnas, L A Kuzmichev, V V Lenok, B K Lubsandorzhiev, N B Lubsandorzhiev, R R Mirgazov, R Mirzoyan, R D Monkhoev, R Nachtigall, A L Pakhorukov, M I Panasyuk, L V Pankov, V A Poleschuk, E G Popova, A Porelli, V V Prosin, V S Ptuskin, A A Petrukhin, G I Rubtsov, M Rueger, V S Samoliga, P S Satunin, V Yu Savinov, Yu A Semeney, B A Shaibonov Jr B A Shaibonov Jr, A A Silaev, A A Silaev Jr A A Silaev Jr, A V Skurikhin, M Slunecka, C Spiering, L G Sveshnikova, A Tkachenko, L Tkachev, M Tluczykont, R Wischnewski, I I Yashin, A V Zagorodnikov, and V L Zurbanov

Subjects
Physics, Physics::Instrumentation and Detectors, Cherenkov detector, Astrophysics::High Energy Astrophysical Phenomena, Taiga, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Cosmic ray, Astrophysics, Knee region, Cherenkov Telescope Array, law.invention, law, Instrumentation, Mathematical Physics, Cherenkov radiation
Abstract

TAIGA stands for ``Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy'' and is a project to built a complex, hybrid detector system for ground-based gamma-ray astronomy from a few TeV to several PeV, and for cosmic ray studies from 100 TeV to 1 EeV. TAIGA will search for ``PeVatrons'' (ultra-high energy gamma-ray sources) and measure the composition and spectrum of cosmic rays in the knee region (100 TeV–10 PeV) with good energy resolution and high statistics. TAIGA will include Tunka-HiSCORE — an array of wide-angle air Cherenkov stations, an array of Imaging Atmospheric Cherenkov Telescopes, an array of particle detectors, both on the surface and underground and the TUNKA-133 air Cherenkov array.

Published
2014

18. First deployment and prototype data of HiSCORE

Author

R Nachtigall, M Kunnas, S N Epimakhov, M Tluczykont, L A Kuzmichev, S F Berezhnev, N M Budnev, M Büker, A Chiavassa, O B Chvalaev, O A Gress, A N Dyachok, U Einhaus, D Hampf, D Horns, A Ivanova, N I Karpov, N N Kalmykov, E N Konstantinov, A V Korobchenko, E E Korosteleva, V A Kozhin, B K Lubsandorzhiev, N B Lubsandorzhiev, R R Mirgazov, A Pakharukov, M I Panasyuk, L V Pankov, V Poleschuk, E G Popova, V V Prosin, V S Ptuskin, G P Rowell, Yu A Semeney, B A Shaibonov, A A Silaev, A A Silaev (junior), A V Skurikhin, C Spiering, L G Sveshnikova, R Wischnewski, I V Yashin, and A V Zagorodnikov

Subjects
Physics, History, Photomultiplier, COSMIC cancer database, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, media_common.quotation_subject, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Astronomy, Cosmic ray, Computer Science Applications, Education, Data acquisition, Air shower, Sky, media_common
Abstract

With the HiSCORE (Hundred*i Square kilometer Cosmic ORigin Explorer) experiment we aim at the exploration of the accelerator sky using indirect air shower observations of cosmic rays from 100 TeV to 1 EeV and gamma rays above 10 TeV to several PeV. In this paper the HiSCORE detector is discribed and the results of the first prototype deployment are shown. Several components are discussed like the photomultiplier tubes, the clip-sum-trigger and the DRS4 based data acquisition. We present data taken with a first prototype station in April 2012 at Tunka.

Published
2013

19. Deformation of a spherical dome during shock loading

Author

V. V. Emel'yanenko, L. P. Khoroshun, and N. I. Karpov

Subjects
Dome (geology), Materials science, Mechanics of Materials, Mechanical Engineering, Computational Mechanics, Mechanics, Deformation (meteorology), Shock (mechanics)
Published
1984

20. Deformation of spherical shells under a wind load

Author

N. I. Karpov and V. V. Emel'yanenko

Subjects
Materials science, Mechanics of Materials, Solid mechanics, Mechanics, Deformation (meteorology), Wind engineering, Spherical shell
Published
1983

21. A certain approach to the solution of boundary value problems for the theory of plates and beams

Author

N. I. Karpov

Subjects
Mathematical optimization, Mechanical Engineering, Mathematical analysis, Computational Mechanics, Mixed boundary condition, Singular boundary method, Boundary knot method, Robin boundary condition, Mechanics of Materials, Free boundary problem, Neumann boundary condition, Cauchy boundary condition, Boundary value problem, Mathematics
Published
1989

26. Stress-strain state of plates with point fixing

Author

N. I. Karpov and O. A. Karpova

Subjects
Mechanics of Materials, Mechanical Engineering, Mathematical analysis, Stress–strain curve, Computational Mechanics, Point (geometry), State (functional analysis), Mathematics
Published
1989

28. The dynamic stability of a cylindrical shell reinforced with longitudinal ribs

Author

N. I. Karpov

Subjects
Physics, Mechanical Engineering, Nuclear Theory, Computational Mechanics, Shell (structure), Shell theory, Mechanics, Instability, Stability (probability), Rod, Cross section (physics), Algebraic equation, Dynamic problem, Mechanics of Materials, Physics::Atomic and Molecular Clusters
Abstract

The dynamic stability of a cylindricaI shell uniformly reinforced with thin-walled rods of open cross section with equal elastic and geometric characteristics is considered. It is assumed that the shell is subjected to a periodic force distributed uniformly over its ends. The problem of stability of the reinforced shell is considered as a contact problem of shell and rod theory, An exact method for solving the infinite system of algebraic equations which usually arise in dynamic problems of reinforced shell theory is proposed. The conventional method which Bolotin developed and extended to shell theory problems is used to determine approximately the prin., cipal instability domains.

Published
1967

30. Stability of a cylindrical shell reinforced with rigid ribs

Author

N. I. Karpov

Subjects
Materials science, Mechanics of Materials, business.industry, Mechanical Engineering, Computational Mechanics, Shell (structure), Structural engineering, Composite material, business, Stability (probability)
Published
1966

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