Персона:
Астапов, Иван Иванович

Научные группы

Научная группа

TAIGA (Tunka Advanced Instrument for Gamma Astronomy and cosmic rays)

Научная группа

НЕВОД

Организационные подразделения

Организационная единица

Институт ядерной физики и технологий

Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.

Фамилия

Астапов

Имя

Иван Иванович

Полная страница элемента

Результаты поиска

Теперь показываю 1 - 10 из 21

Только метаданные
Invesigation of the Local Anisotropy of Cosmic Ray Muon Flux During Coronal Mass Ejections in 2007–2018
(2019) Astapov, I. I.; Barbashina, N. S.; Dmitrieva, A. N.; Konovalova, A. Y.; Osetrova, N. V.; Shutenko, V. V.; Yashin, I. I.; Астапов, Иван Иванович; Барбашина, Наталья Сергеевна; Дмитриева, Анна Николаевна; Коновалова, Алена Юрьевна; Шутенко, Виктор Викторович; Яшин, Игорь Иванович
© 2019, Pleiades Publishing, Ltd.Coronal mass ejections are among the most powerful disturbances of the interplanetary space. They can influence the state of the near-Earth space, including magnetosphere of the Earth. In addition, such disturbances modulate the flux of cosmic rays and penetrate both the heliosphere and the Earth’s magnetosphere. In order to find an early alert of such events, it is necessary to investigate the flux of particles arriving to the Earth and providing information about events in the heliosphere. The paper presents the results of investigation of the anisotropy of the cosmic ray muon flux by means of the muon hodoscope URAGAN in the period from 2007 to 2018.
Только метаданные
Elimination of Diurnal, Annual, and Solar Variations in the Matrix Observations of the URAGAN Muon Hodoscope
(2019) Gvishiani, A. D.; Getmanov, V. G.; Dobrovolsky, M. N.; Sidorov, R. V.; Astapov, I. I.; Dmitrieva, A. N.; Kovylyaeva, A. A.; Yashin, I. I.; Астапов, Иван Иванович; Дмитриева, Анна Николаевна; Яшин, Игорь Иванович
© 2019, Pleiades Publishing, Ltd.A method for elimination of periodical diurnal, annual, and 27-day and 11-year solar variations in the matrix observations of the URAGAN muon hodoscope was developed. The analysis of the parameters of these variations in the time and frequency domains was performed. Two-dimensional bandpass filtering of sequences of muon hodoscope matrix observations was implemented. The structure of a two-dimensional filter is developed, based on the operation of elementwise matrix multiplications and additions. Examples of eliminating variations in the URAGAN muon hodoscope matrix observations are discussed.
Открытый доступ
Research projects of the Mega-science class in Nuclear University
(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.
Открытый доступ
Investigation of local deformations of muon flux angular distribution during CME with GSE-mapping technique
(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.
Только метаданные
TAIGA: A Complex of Hybrid Systems of Cooperating Detectors for Gamma Astronomy and Cosmic Ray Physics in the Tunka Valley
(2019) Budnev, N. M.; Bezyazeekov, P. A.; Borodin, A. N.; Wischnewski, R.; Astapov, I. I.; Kindin, V. V.; Kokoulin, R. P.; Kompaniets, K. G.; Petrukhin, A. A.; Yashin, I. I.; Астапов, Иван Иванович; Киндин, Виктор Владимирович; Кокоулин, Ростислав Павлович; Компаниец, Константин Георгиевич; Петрухин, Анатолий Афанасьевич; Яшин, Игорь Иванович
© 2019, Allerton Press, Inc.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.
Только метаданные
Monte Carlo Simulation of the TAIGA Experiment
(2019) Postnikov, E. B.; Bezyazeekov, P. A.; Boreyko, V. F.; Borodin, A. N.; Astapov, I. I.; Kindin, V. V.; Kokoulin, R. P.; Kompaniets, K. G.; Petrukhin, A. A.; Postnikov, E. B.; Yashin, I. I.; Астапов, Иван Иванович; Киндин, Виктор Владимирович; Кокоулин, Ростислав Павлович; Компаниец, Константин Георгиевич; Петрухин, Анатолий Афанасьевич; Яшин, Игорь Иванович
© 2019, Allerton Press, Inc.Abstract—: The TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma-ray Astronomy) experiment aims at observing gamma-rays in the energy range from 1 TeV to several 100 TeV. The operation of the observatory is based on a new hybrid approach that combines imaging air Cherenkov telescopes (IACTs) and wide-angle Cherenkov detectors (TAIGA-HiSCORE) for measuring times of extensive air shower (EAS) light front arrival. Monte Carlo simulations are compared to real data to determine the performance of the detector setup. Dedicated software and algorithms are described, model parameters are given, and an overview of the current status of model-based performance studies is presented.
Только метаданные
First Season of Operation of the TAIGA Hybrid Cherenkov Array
(2019) Sveshnikova, L. G.; Bezyazeekov, P. A.; Boreyko, V.; Borodin, A. N.; Astapov, I. I.; Kindin, V. V.; Kokoulin, R. P.; Kompaniets, K. G.; Petrukhin, A. A.; Yashin, I. I.; Астапов, Иван Иванович; Киндин, Виктор Владимирович; Кокоулин, Ростислав Павлович; Компаниец, Константин Георгиевич; Петрухин, Анатолий Афанасьевич; Яшин, Игорь Иванович
© 2019, Allerton Press, Inc.Abstract: Work is currently under way in the Tunka Valley, 50 km from Lake Baikal, to create the TAIGA gamma observatory for studying gamma radiation and cosmic ray fluxes in the 1013–1018 eV range of energies. To detect gamma rays with energies above tens of TeV, a hybrid method of detecting showers is implemented. It is based on data obtained by the TAIGA Imaging Atmospheric Cherenkov Telescope (IACT) and the wide-angle TAIGA-HiSCORE array. The preliminary results from processing the telescope’s data for the low-energy region (>2–3 TeV) are presented. Joint events with energy more than 50 TeV are analyzed and compared to Monte Carlo calculations.
Только метаданные
Energy Spectrum of Primary Cosmic Rays, According to TUNKA-133 and TAIGA-HiSCORE EAS Cherenkov Light Data
(2019) Prosin, V. V.; Bezyazeekov, P. A.; Boreyko, V.; Borodin, A. N.; Astapov, I. I.; Kindin, V. V.; Kokoulin, R. P.; Kompaniets, K. G.; Petrukhin, A. A.; Yashin, I. I.; Астапов, Иван Иванович; Киндин, Виктор Владимирович; Кокоулин, Ростислав Павлович; Компаниец, Константин Георгиевич; Петрухин, Анатолий Афанасьевич; Яшин, Игорь Иванович
© 2019, Allerton Press, Inc.Abstract: The Tunka-133 Cherenkov complex for recording extensive air showers (EAS) collected data over seven winters from 2009 to 2017. The differential energy spectra of all particles was acquired in the 6 × 1015–3 × 1018 eV range of energies over 2175 h. The TAIGA-HiSCORE complex is continually being expanded and upgraded. Data acquired by 30 first-line stations over 35 days during the period 2017–2018 is analyzed in this work. As at the Tunka-133 setup, the primary particle energies above 1015 eV are measured using the density of the Cherenkov light flux at a distance of 200 m from a shower’s axis. Data on lower energies are collected by determining the energy of the light flux near a shower’s axis. This results in a spectrum of 2 × 1014–1017 eV. The combined spectrum for the two systems covers a range of 2 × 1014–2 × 1018 eV.
Только метаданные
TAIGA—A hybrid array for high energy gamma-ray astronomy and cosmic-ray physics
(2022) Астапов, Иван Иванович; Яшин, Игорь Иванович; Кокоулин, Ростислав Павлович; Петрухин, Анатолий Афанасьевич; Astapov, I. I.; Kindin, V. V.; Kokoulin, R. P.; Kompaniets, K. G.; Okuneva, E. A.; Petrukhin, A. A.; Yashin, I. I.; Киндин, Виктор Владимирович
The concept of the TAIGA experiment is to combine wide-angle timing and imaging Cherenkov telescopes as well as electron and muon detectors. The TAIGA facility aims at gamma-ray astrophysics at energies from a few TeV to several PeV and cosmic-ray physics from 100 TeV to several EeV but also pursues searches for astrophysical nanosecond transients, axion-like particles, Lorentz invariance violation and other unexpected manifestations of New Physics. TAIGA-1, a hybrid detector complex with an area of 1 km2, operating since 2021 in the Tunka valley, 50 km to the West from the southernmost tip of lake Baikal, and the plans for its upgrade are presented.
Открытый доступ
Analysis of trajectories of primary particles and muons detected at the Earth's surface with different polarity of the Sun
(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.