2018, Астапов, Иван Иванович, Астапов, И. И., Яшин, И. И.

2019, Astapov, I. I., Barbashina, N. S., Dmitrieva, A. N., Melnikova, I. A., Osetrova, N. V., Shutenko, V. V., Yashin, I. I., Астапов, Иван Иванович, Барбашина, Наталья Сергеевна, Дмитриева, Анна Николаевна, Шутенко, Виктор Викторович, Яшин, Игорь Иванович

© Published under licence by IOP Publishing Ltd.Coronal mass ejections (CME) have an impact on the flux of cosmic rays that penetrate the disturbed areas in the heliosphere and the near-terrestrial space. Unlike most ground-based cosmic ray detectors, the URAGAN muon hodoscope (MEPhI) allows to investigate both the integrated counting rate of registered particles and angular characteristics of the muon flux at the ground level. To select the local areas with statistically significant intensity changes, the angular distributions for the last hour and preceding it 24 hours corrected for the barometric effect are used. Angular distributions are smoothed, and the matrix of relative changes of the angular distribution in units of statistical errors is formed. The use of asymptotic directions calculated in advance, the angular cells of the matrix are mapped from the local coordinate system to the GSE coordinate system. The results of the study of GSE-mapping of local deformations of the angular distributions for different types of CMEs are discussed.

2019, Kovylyaeva, A. A., Astapov, I. I., Barbashina, N. S., Dmitrieva, A. N., Shutenko, V. V., Yashin, I. I., Астапов, Иван Иванович, Барбашина, Наталья Сергеевна, Дмитриева, Анна Николаевна, Шутенко, Виктор Викторович, Яшин, Игорь Иванович

© Published under licence by IOP Publishing Ltd. The flux of cosmic rays passing through the heliosphere changes its characteristics (energy and angular distribution) due to the influence of the interplanetary magnetic field. Because of this, the muon flux produced by primary cosmic rays in the Earth atmosphere also changes its characteristics. Muons registered at the surface of the Earth are generated mainly by primary protons and helium nuclei with energies from 10 GeV to TeV. The trajectories of these particles in the heliosphere are significantly influenced by the interplanetary magnetic field. The construction of backward trajectories of particles from the Earth surface (detector) into the heliosphere region allows us to estimate the relationship between the trajectories of muons and primary particles. The trajectories of muons and parent protons and helium nuclei of various energies for positive and negative polarity of the Sun in a quiet period and under the influence of disturbances in the interplanetary magnetic field are presented. It is shown that the change in the polarity of the Sun and the influence of disturbances in the interplanetary magnetic field lead to qualitative changes in the regions of the heliosphere through which primary particles pass.

2019, Getmanov, V. G., Gvishiani, A. D., Dobrovolsky, M. N., Peregoudov, D. V., Astapov, I. I., Barbashina, N. S., Dmitrieva, A. N., Shutenko, V. V., Yashin, I. I., Астапов, Иван Иванович, Барбашина, Наталья Сергеевна, Дмитриева, Анна Николаевна, Шутенко, Виктор Викторович, Яшин, Игорь Иванович

© 2019 Published under licence by IOP Publishing Ltd.The method of two-dimensional filtering of modulated matrix data sequences is proposed. The structure of a two-dimensional filter based on operations of element-by-element matrix multiplications is developed. An application of the two-dimensional filtering of the URAGAN muon hodoscope matrix data sequence for the elimination of muon flux diurnal modulations is discussed.

2019, Moshkova, D. M., Vasiliev, A. N., Astapov, I. I., Barbashina, N. S., Lozovskij, D. L., Васильев, Александр Николаевич, Астапов, Иван Иванович, Барбашина, Наталья Сергеевна, Лозовский, Дмитрий Львович

© Published under licence by IOP Publishing Ltd.Fundamental research in the field of high energy physics and nuclear physics is carried out at large international experiments with the joint participation of scientific organizations and research universities. This article discusses the features of the participation of a nuclear university in international research projects of the Mega-science class by the example of the National Research Nuclear University MEPhI. MEPhI is actively involved in the development, operation, and modernization of research projects of the Mega-science class, such as LHC, FAIR, NICA, RHIC, ITER, NEVOD. Participation in these megaprojects gives MEPhI an opportunity to gain unique new knowledge for the development of nuclear technologies and nuclear energy, to increase prestige and to gain access to modern high technologies. These issues were discussed at a conference "Personnel training and legal support for the implementation of scientific projects of the Mega-science class" organized by National Research Nuclear University MEPhI and Kutafin Moscow State Law University on June 20-21, 2019. The aim of the Conference is to discuss the policy management issues of implementation of the Mega-science class research projects.

2024, Свешникова, Л. Г., Астапов, И. И., Безъязыков, П. А., Блинов, А., Бонвеч, Е., Бородин, А. Н., Буднев, Н. М., Булан, А., Вайдянатан, А., Волков, Н., Волчугов, П., Воронин, Д., Гармаш, А. Ю., Гафаров, А. Р., Гребенюк, В. М., Гресс, Е., Гресс, О. А., Гресс, Т. И., Гринюк, А. А., Гришин, О. Г., Дячок, А. Н., Журов, Д. П., Загородников, А. В., Иванова, А. Л., Илюшин, М., Калмыков, Н. Н., Киндин, В. В., Кирюхин, С. Н., Кожин, В. А., Кокоулин, Р. П., Колосов, Н., Компаниец, К. Г., Коростелева, Е. Е., Кравченко, Е. А., Крюков, А. П., Кузьмичев, Л. А., Кьявасса, А., Лаврова, М., Лагутин, А. А., Лемешев, Ю., Лубсандоржиев, Б. К., Лубсандоржиев, Н. Б., Миргазов, Р. Р., Монхоев, Р. Д., Окунева, Е., Осипова, Э. А., Пан, А., Панов, А., Паньков, Л. В., Пахоруков, А. Л., Петрухин, А. А., Подгрудков, Д., Попова, Е. Г., Постников, Е. Б., Просин, В. В., Птускин, В. С., Пушнин, А. А., Разумов, А., Райкин, Р. И., Рубцов, Г. И., Рябов, Е. В., Самолига, В. С., Сатышев, Е., Сидоренков, А. Ю., Силаев, А. А., Силаев (мл.), А. А., Скурихин, А. В., Соколов, А. В., Таболенко, В. А., Танаев, А., Терновой, М., Ткачев, Л. Г., Ушаков, Н., Чернов, Д., Шипилов, Д., Яшин, И. И., Яшин, Игорь Иванович, Кокоулин, Ростислав Павлович, Компаниец, Константин Георгиевич, Киндин, Виктор Владимирович, Астапов, Иван Иванович, Петрухин, Анатолий Афанасьевич

В статье представлен статус эксперимента TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma-ray Astronomy), расположенного в Тункинской долине. В статье в основном представлены задачи и развитые подходы для их решения, а также первые результаты по гамма-астрономии высоких энергий (10 и более тераэлектронвольт), полученные по двух-трех-летней экспозиции. Обсуждаются актуальные задачи гамма-астрономии и планы развития установки.

2019, Kuzmichev, L., Astapov, I., Bezyazeekov, P., Borodin, A., Kindin, V., Kokoulin, R., Kompaniets, K., Petrukhin, A., Yashin, I., Астапов, Иван Иванович, Киндин, Виктор Владимирович, Кокоулин, Ростислав Павлович, Компаниец, Константин Георгиевич, Петрухин, Анатолий Афанасьевич, Яшин, Игорь Иванович

In this talk, we describe the status and the perspectives of the hybrid Air Shower Array TAIGA (Tunka Advanced Instrument for cosmic rays and Gamma Astronomy) which is currently under construction in the Tunka Valley close to Lake Baikal and is taking data in its initial configurations. TAIGA is designed for the study of gamma rays and charged cosmic rays in the energy range of 10(13) eV- 10(18) eV. It has the potential to play an important role in the search for Galactic Pevatrons and within a multi-messenger approach to explore the high-energy sky.

2019, Prosin, V., Astapov, I., Bezyazeekov, P., Borodin, A., Kindin, V., Kokoulin, R., Kompaniets, K., Petrukhin, A., Yashin, I., Астапов, Иван Иванович, Киндин, Виктор Владимирович, Кокоулин, Ростислав Павлович, Компаниец, Константин Георгиевич, Петрухин, Анатолий Афанасьевич, Яшин, Игорь Иванович

The extensive air shower Cherenkov light array Tunka-133 collected data during 7 winter seasons from 2009 to 2017. From 2175 hours of data taking, we derived the differential energy spectrum of cosmic rays in the energy range 6 center dot 10(15) - 2 center dot 10(18) eV. The TAIGA-HiSCORE array is in the process of continuous expansion and modernization. Here we present the results obtained with 28 stations of the first HiSCORE stage from 35 clear moonless nights in the winter of 2017-2018. The combined spectrum of two arrays covers a range of 2 center dot 10(14) - 2 center dot 10(18) eV.

2019, Zhurov, D., Gress, O., Sidorov, D., Bezyazeekov, P., Astapov, I., Kindin, V., Kokoulin, R., Kompaniets, K., Petrukhin, A., Yashin, I., Астапов, Иван Иванович, Киндин, Виктор Владимирович, Кокоулин, Ростислав Павлович, Компаниец, Константин Георгиевич, Петрухин, Анатолий Афанасьевич, Яшин, Игорь Иванович

© Published under licence by IOP Publishing Ltd. In TAIGA Observatory (Tunka Advanced Instrument for cosmic ray physics and Gamma-ray Astronomy) we are commissioning the first Imaging Atmospheric Cherenkov Telescope (IACT). The telescope has an alt-azimuth mount and 17-bit shaft encoder for each axis, stepper motors are used for axis control. For the pointing calibration of the telescope a CCD-camera is installed on the dish of the telescope and its position allows to capture simultaneously both the Cherenkov camera with LEDs and the sky with observed source. Since October 2017, the telescope has been operating in tracking mode. In this work the TAIGAIACT telescope pointing calibration approach and first results of the tracking operations are described.

2019, Peregoudov, D., Gvishiani, A., Getmanov, V., Dobrovolsky, M., Astapov, I., Barbashina, N., Dmitrieva, A., Shutenko, V. V., Yashin, I., Астапов, Иван Иванович, Барбашина, Наталья Сергеевна, Дмитриева, Анна Николаевна, Шутенко, Виктор Викторович, Яшин, Игорь Иванович

© Published under licence by IOP Publishing Ltd. The problem of the hardware response function calculation for the URAGAN hodoscope (MEPhI) is analyzed. The simpli ed hodoscope model is developed for which the response function is found out analytically. It is shown that the presence of non-detecting intervals (gaps between detectors) leads to the response function that includes azimuthal dependence. A numerical procedure of the response function calculation is developed for the URAGAN hodoscope. The result is in correlation with the averaged matrix data from the hodoscope. The application of response function analyses to detecting of reduced muon ux areas is demonstrated. Further re nement of response function calculation is discussed.