Персона: Юркин, Юрий Тихонович
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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.
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- ПубликацияТолько метаданныеHelium Fluxes Measured by the PAMELA Experiment from the Minimum to the Maximum Solar Activity for Solar Cycle 24(2022) Marcelli, N.; Boezio, M.; Lenni, A.; Menn, W.; Galper, A. M.; Koldashov, S. V.; Koldobskiy, S.; Leonov, A. A.; Malakhov, V. V.; Mayorov, A. G.; Mikhailov, V. V.; Spillantini, P.; Voronov, S. A.; Yurkin, Y. T.; Колдобский, Сергей Александрович; Леонов, Алексей Анатольевич; Малахов, Виталий Валерьевич; Майоров, Андрей Георгиевич; Михайлов, Владимир Владимирович; Воронов, Сергей Александрович; Юркин, Юрий Тихонович© 2022. The Author(s). Published by the American Astronomical Society..Time-dependent energy spectra of galactic cosmic rays (GCRs) carry fundamental information regarding their origin and propagation. When observed at the Earth, these spectra are significantly affected by the solar wind and the embedded solar magnetic field that permeates the heliosphere, changing significantly over an 11 yr solar cycle. Energy spectra of GCRs measured during different epochs of solar activity provide crucial information for a thorough understanding of solar and heliospheric phenomena. The PAMELA experiment collected data for almost 10 years (2006 June 15-2016 January 23), including the minimum phase of solar cycle 23 and the maximum phase of solar cycle 24. In this paper, we present new spectra for helium nuclei measured by the PAMELA instrument from 2010 January to 2014 September over a three-Carrington-rotation time basis. These data are compared to the PAMELA spectra measured during the previous solar minimum, providing a picture of the time dependence of the helium-nuclei fluxes over a nearly full solar cycle. Time and rigidity dependencies are observed in the proton-to-helium flux ratios. The force-field approximation of the solar modulation was used to relate these dependencies to the shapes of the local interstellar proton and helium-nuclei spectra.
- ПубликацияТолько метаданныеStudy of Forbush Decrease Recovery Times by the Payload for Antimatter Matter Exploration and Light-Nuclei Astrophysics (PAMELA) Experiment(2023) Lagoida, I. A.; Voronov, S. A.; Mikhailov, V. V.; Galper, A. M.; Leonov, A. N.; Malakhov, V.; Mayorov, A.; Yurkin, Y. T.; Лагойда, Илья Алексеевич; Воронов, Сергей Александрович; Михайлов, Владимир Владимирович; Леонов, Алексей Анатольевич; Малахов, Виталий Валерьевич; Майоров, Андрей Георгиевич; Юркин, Юрий Тихонович
- ПубликацияТолько метаданныеMultiple Coulomb scattering method to reconstruct low-energy gamma–ray direction in the GAMMA-400 space-based gamma–ray telescope(2019) Topchiev, N. P.; Bakaldin, A. V.; Dalkarov, O. D.; Egorov, A. E.; Leonov, A. А.; Galper, A. M.; Dzhivelikyan, E. A.; Kheymits, M. D.; Mikhailov, V. V.; Yurkin, Y. T.; Леонов, Алексей Анатольевич; Хеймиц, Максим Дмитриевич; Михайлов, Владимир Владимирович; Юркин, Юрий Тихонович© 2019 COSPAR The GAMMA-400 currently developing space-based gamma-ray telescope is designed to measure the gamma-ray fluxes in the energy range from ∼20 MeV to several TeV in the highly elliptic orbit (without shadowing the telescope by the Earth) continuously for a long time. The physical characteristics of the GAMMA-400 gamma-ray telescope, especially the angular and energy resolutions (at 100-GeV gamma rays they are ∼0.01° and ∼1%, respectively), allow us to consider this space-based experiment as the next step in the development of extraterrestrial high-energy gamma-ray astronomy. In this paper, a method to improve the reconstruction accuracy of incident angle for low-energy gamma rays in the GAMMA-400 space-based gamma-ray telescope is presented. The special analysis of topology of pair-conversion events in thin layers of converter was performed. Applying the energy dependence of multiple Coulomb scattering for pair components, it is possible to estimate the energies for each particle, and to use these energies as weight in the angle reconstruction procedure. To identify the unique track in each projection the imaginary curvature method is applied. It allows us to obtain significantly better angular resolution in comparison with other methods applied in current space-based experiments. When using this method for 50-MeV gamma rays the GAMMA-400 gamma-ray telescope angular resolution is about 4°.
- ПубликацияТолько метаданныеThe Anticoincidence System of Space-Based Gamma-Ray Telescope GAMMA-400, Test Beam Studies of Anticoincidence Detector Prototype with SiPM Readout(2020) Bakaldin, A. V.; Dalkarov, O. D.; Egorov, A. E.; Gusakov, Y. V.; Arkhangelskiy, A. I.; Galper, A. M.; Arkhangelskaja, I. V.; Chernysheva, I. V.; Kheymits, M. D.; Leonov, A. A.; Runtso, M. F.; Yurkin, Y. T.; Архангельский, Андрей Игоревич; Архангельская, Ирина Владимировна; Чернышева, Ирина Вячеславовна; Хеймиц, Максим Дмитриевич; Леонов, Алексей Анатольевич; Юркин, Юрий Тихонович© 2020, Pleiades Publishing, Ltd.Abstract: The GAMMA-400 gamma-ray telescope is planned for the launch at the end of 2026 on the Navigator service platform designed by Lavochkin Association on an elliptical orbit with following initial parameters: an apogee ̴300 000, a perigee ̴500 km, a rotation period ̴7 days and inclination of 51.4̊. The apparatus is expected to operate for more than 5 years, reaching an unprecedented sensitivity for the search of dark matter signatures and the study of the unresolved and so far unidentified gamma-ray sources. The segmented anticoincidence counters surround the converter-tracker and calorimeter of the telescope with the purpose of vetoing to assure a clean track reconstruction and charged particle background suppression. The anticoincidence detector prototype based on long BC-408 scintillator with silicon photomultipliers readout was tested using 300-MeV positron beam of synchrotron C-25P ‘‘PAKHRA’’ of Lebedev Physical Institute. The measurement setup, design concepts for the prototype detector together with test results are discussed.
- ПубликацияТолько метаданныеGamma- and Cosmic-Ray observations with the GAMMA-400 Gamma-Ray telescope(2022) Topchiev, N. P.; Bakaldin, A. V.; Cherniy, R. A.; Gudkova, E. N.; Galper, A. M.; Arkhangelskaja, I. V.; Arkhangelskiy, A. I.; Chernysheva, I. V.; Kheymits, M. D.; Korotkov, M. G.; Leonov, A. A.; Malinin, A. G.; Mikhailov, V. V.; Mikhailova, A. V.; Runtso, M. F.; Yurkin, Y. T.; Архангельская, Ирина Владимировна; Архангельский, Андрей Игоревич; Чернышева, Ирина Вячеславовна; Хеймиц, Максим Дмитриевич; Коротков, Михаил Геннадиевич; Леонов, Алексей Анатольевич; Малинин, Александр Геннадьевич; Михайлов, Владимир Владимирович; Михайлова, Анна Владимировна; Юркин, Юрий Тихонович© 2022 COSPARThe future space-based GAMMA-400 gamma-ray telescope will operate onboard the Russian astrophysical observatory in a highly elliptic orbit during 7 years to observe Galactic plane, Galactic Center, Fermi Bubbles, Crab, Vela, Cygnus X, Geminga, Sun, and other regions and measure gamma- and cosmic-ray fluxes. Observations will be performed in the point-source mode continuously for a long time (∼100 days). GAMMA-400 will measure gamma rays in the energy range from ∼ 20 MeV to several TeV and cosmic-ray electrons + positrons up to several tens TeV. GAMMA-400 instrument will have very good angle and energy resolutions, high separation efficiency of gamma rays from cosmic-ray background, as well as electrons + positrons from protons. The main feature of GAMMA-400 is the unprecedented angular resolution for energies > 30 GeV better than the space-based and ground-based gamma-ray telescopes by a factor of 5–10. GAMMA-400 observations will permit to resolve gamma rays from annihilation or decay of dark matter particles, identify many discrete sources, clarify the structure of extended sources, specify the data on cosmic-ray electron + positron spectra.
- ПубликацияТолько метаданныеEast-West Proton Flux Anisotropy Observed with the PAMELA Mission(2021) Bruno, A.; Martucci, M.; Cafagna, F. S.; Sparvoli, R.; Galper, A. M.; Koldashov, S. V.; Koldobskiy, S.; Leonov, A. A.; Malakhov, V. V.; Mayorov, A. G.; Mikhailov, V. V.; Spillantini, P.; Voronov, S. A.; Yurkin, Y. T.; Колдобский, Сергей Александрович; Леонов, Алексей Анатольевич; Малахов, Виталий Валерьевич; Майоров, Андрей Георгиевич; Михайлов, Владимир Владимирович; Воронов, Сергей Александрович; Юркин, Юрий Тихонович© 2021. The American Astronomical Society. All rights reserved..We present a study of the east-west anisotropy of trapped-proton fluxes in low-Earth orbit based on the measurements of the Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics (PAMELA) experiment. The differential intensities of eastward- and westward-traveling protons detected in the South Atlantic Anomaly region were estimated as a function of equatorial pitch angle and drift shell, for six energy bins between 80 MeV and 2 GeV. We found that, as a consequence of the strong atmospheric gradient coupled with the large gyroradius in this energy range, the intensities of eastward fluxes exceed those of westward fluxes by a factor of ∼10-20. However, the reported directional asymmetry also depends on the sign of the local flux gradient, resulting in more intense westward fluxes beyond the radial distances where the inner belt peaks. PAMELA observations can be used to improve the description of the near-Earth radiation environment at lowest altitudes and highest trapping energies, where current theoretical and empirical models are affected by the largest uncertainties.
- ПубликацияТолько метаданныеCosmophysical Research with GAMMA-400(2023) Topchiev, N. P.; Galper, A. M.; Arkhangelskaja, I. V.; Arkhangelskiy, A. I.; Dalkarov, O. D.; Kheymits, M. D.; Korotkov, M. G.; Leonov, A. A.; Malinin, A. G.; Mikhailov, V. V.; Yurkin, Y. T.; Архангельская, Ирина Владимировна; Архангельский, Андрей Игоревич; Далькаров, Олег Дмитриевич; Хеймиц, Максим Дмитриевич; Коротков, Михаил Геннадиевич; Леонов, Алексей Анатольевич; Малинин, Александр Геннадьевич; Михайлов, Владимир Владимирович; Юркин, Юрий Тихонович
- ПубликацияТолько метаданныеCosmic ray electron and positron spectrum with the PAMELA experiment(2019) Adriani, O.; Barbarino, G.; Bazilevskaya, G. A.; Bellotti, R.; Mikhailov, V. V.; Galper, A. M.; Karelin, A. V.; Koldashov, S. V.; Koldobskiy, S. A.; Leonov, A. A.; Malakhov, V. V.; Mayorov, A. G.; Spillantini, P.; Voronov, S. A.; Yurkin, Yu. T.; Михайлов, Владимир Владимирович; Колдобский, Сергей Александрович; Леонов, Алексей Анатольевич; Малахов, Виталий Валерьевич; Майоров, Андрей Георгиевич; Воронов, Сергей Александрович; Юркин, Юрий Тихонович© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).The PAMELA magnetic spectrometer, located on board the Resurs-DK1 satellite on Earth polar orbit with altitude of 350-600 km, measured the fluxes of cosmic ray particles and antiparticles in a wide energy range from 50 MeV to several TeVs. In this paper new results on the "all-electron" (sum electrons and positrons) spectrum are presented. New improved analysis on the full data set from 2006 to 2016 allows a significant increase in statistic compared to previously published results and an extension of energy interval up to 1 TeV.
- ПубликацияТолько метаданныеThe Characteristics of Fast Scintillation Detectors of Time-of-Flight and Anticoincidence Systems of Space-Based Gamma-Ray Telescope GAMMA-400 with Silicon Photomultipliers Readout(2023) Arkhangelskiy, A. I.; Galper, A. M.; Arkhangelskaya, I. V.; Dalkarov, O. D.; Korotkov, M. G.; Leonov, A. A.; Kheymits, M. D.; Chasovikov, E. N.; Yurkin, Y. T.; Архангельский, Андрей Игоревич; Архангельская, Ирина Владимировна; Далькаров, Олег Дмитриевич; Коротков, Михаил Геннадиевич; Леонов, Алексей Анатольевич; Хеймиц, Максим Дмитриевич; Часовиков, Евгений Николаевич; Юркин, Юрий Тихонович
- ПубликацияТолько метаданныеCosmic Ray Electron and Positron Spectrum with the PAMELA Experiment(2021) Adriani, O.; Barbarino, G.; Bazilevskaya, G. A.; Bellotti, R.; Mikhailov, V. V.; Galper, A. M.; Karelin, A. V.; Koldashov, S. V.; Koldobsky, S. A.; Leonov, A. A.; Malakhov, V. V.; Mayorov, A. G.; Spillantini, P.; Voronov, S. A.; Yurkin, Yu. T.; Михайлов, Владимир Владимирович; Колдобский, Сергей Александрович; Леонов, Алексей Анатольевич; Малахов, Виталий Валерьевич; Майоров, Андрей Георгиевич; Воронов, Сергей Александрович; Юркин, Юрий Тихонович© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)The PAMELA magnetic spectrometer, located on board the Resurs-DK1 satellite on Earth polar orbit with altitude of 350-600 km, measured the fluxes of cosmic ray particles and antiparticles in a wide energy range from 50 MeV to several TeVs. In this paper new results on the "all-electron" (sum electrons and positrons) spectrum are presented. New improved analysis on the full data set from 2006 to 2016 allows a significant increase in statistic compared to previously published results and an extension of energy interval up to 1 TeV.