Персона: Майоров, Андрей Георгиевич
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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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Майоров
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Андрей Георгиевич
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67 results
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- ПубликацияТолько метаданныеSoftware for Numerical Calculations of Particle Trajectories in the Earth’s Magnetosphere and Its Use in Processing PAMELA Experimental Data(2021) Golubkov, V. S.; Mayorov, A. G.; Майоров, Андрей Георгиевич© 2021, Allerton Press, Inc.Abstract: A software package is developed for numerical calculations of particle trajectories in the Earth’s magnetosphere, and are given examples of its use in processing PAMELA experiment data. The particle-in-cell technique is applied according to the Buneman–Boris scheme. The approach is compared to other means of calculation often used to model the motion of charged particles in electromagnetic fields. The software package is tested by reproducing known effects of cosmic ray physics in the magnetosphere.
- ПубликацияТолько метаданныеModification of the SVD Unfolding Regularization Method(2022) Bogomolov, Y. V.; Alekseev, V. V.; Levanova, O. A.; Mayorov, A. G.; Maiorov, A.G.; Malakhov, V. V.; Богомолов, Юрий Викторович; Алексеев, Владислав Владимирович; Майоров, Андрей Георгиевич; Малахов, Виталий ВалерьевичUnfolding is currently an important stage of processing experimental data, reducing the effect of errors and reconstructing approximately real distributions of quantities. Numerous approaches exist to solve this problem; in particular, they are widely used in the modern physics of atomic nuclei and elementary particles, space physics, and other related areas. However, many algorithms are not designed or are poorly adapted to reconstruct multidimensional distributions corresponding to, e.g., several characteristics of particles measured simultaneously. In this work, a method has been proposed to adapt the singular value decomposition (SVD) unfolding algorithm to the multidimensional case. The proposed modified method has been tested in application to simulation data for the cosmic ray spectrum measured in the PAMELA space experiment. This method not only makes it possible to estimate the real distribution of a multidimensional quantity (momentum and two angles specifying the direction of entering a particle into an instrument) but also provides a better result compared to the classical SVD approach in the one-dimensional case (only the momentum of the p-article). © 2022, Pleiades Publishing, Inc.
- ПубликацияТолько метаданныеDirect measurements of cosmic rays (Tev and beyond) using an ultrathin calorimeter: Lessening fluctuation method(2021) Lebedev, I.; Fedosimova, A.; Krassovitskiy, P.; Dmitriyeva, E.; Mayorov, A.; Майоров, Андрей Георгиевич© 2021 by the authors. Licensee MDPI, Basel, Switzerland.In this paper, we propose a method that makes it possible to use an ultrathin calorimeter for direct measurements of cosmic rays with energies of TeV and higher. The problems of determining the primary energy with a thin calorimeter, due to large fluctuations in shower development, the low statistics of analyzed events and the large size required for the calorimeter, are considered in detail. A solution to these problems is proposed on the basis of a lessening fluctuation method. This method is based on the assumption of the universality of the development of cascades initiated by particles of the same energy and mass. For energy reconstruction, so-called correlation curves are used. The main analyzed quantities are the size of the cascade and the rate of its development. The method was tested using the calorimeter of the PAMELA collaboration. Based on simulations, it is shown that the primary energy can be determined on the ascending branch of the cascade curve. This fact solves the problems associated with the need to increase the calorimeter thickness with an increase in primary energy and with the limitation of the analyzed events. The proposed technique is universal for different energies and different nuclei.
- ПубликацияТолько метаданныеLight Nuclei Identification in Cosmic Rays in the PAMELA Experiment by Multiple Measurements of Energy Loss along the Particle Track(2021) Alekseev, V.; Golub, O.; Mayorov, A.; Алексеев, Владислав Владимирович; Голуб, Ольга Александровна; Майоров, Андрей Георгиевич© 2021.Abstract: The article presents a method for identifying light nuclei in cosmic rays from PAMELA spectrometer measurements of magnetic rigidity and energy losses of particles along the track in the time-of-flight and tracking systems. Nuclei from hydrogen to boron inclusive are separated by analyzing energy loss distributions in detector planes caused by their fluctuations. The identification quality estimate and the error (misidentification) probability are also calculated for each nucleus on the basis of Geant4 simulation data.
- ПубликацияТолько метаданныеThe time evolution of the low-energy deuteron fluxes measured in Cosmic Rays with the PAMELA experiment from the 23rd solar minimum to the 24th solar maximum(2025) Lenni, A.; Boezio, M.; Munini, R.; Menn, W.; Galper, A. M.; Koldashov, S. V.; Leonov, A. A.; Malakhov, V. V.; Mayorov, A. G.; Voronov, S. A.; Yurkin, Y. T.; Леонов, Алексей Анатольевич; Малахов, Виталий Валерьевич; Майоров, Андрей Георгиевич; Воронов, Сергей Александрович; Юркин, Юрий Тихонович
- ПубликацияТолько метаданныеThe bound state of dark atom with the nucleus of substance(2025) Bikbaev, T. E.; Khlopov, M. Yu.; Mayorov, A. G.; Майоров, Андрей Георгиевич
- ПубликацияОткрытый доступGEOMAGNETIC CUTOFF RIGIDITY IN NEUTRON MONITOR LOCATIONS(2025) Kruchinin, P. A.; Siruk, S. A.; Mayorov, A. G.; Malakhov, V. V.; Aleksandrin, S. Yu.; Кручинин, Павел Алексеевич; Сирук, Степан Александрович; Майоров, Андрей Георгиевич; Малахов, Виталий Валерьевич; Александрин, Сергей Юрьевич
- ПубликацияТолько метаданныеRegistration of Antiprotons in the Earth’s Radiation Belt in the PAMELA Experiment(2021) Rodenko, S. A.; Mayorov, A. G.; Malakhov, V. V.; Роденко, Светлана Александровна; Майоров, Андрей Георгиевич; Малахов, Виталий Валерьевич© 2021, Allerton Press, Inc.Abstract: The PAMELA magnetic spectrometer on board the Resurs-DK1 spacecraft measured the fluxes of charged particles and antiparticles in cosmic radiation from June 2006 to January 2016. Based on the results from measurements, secondary antiprotons were first detected in near-Earth space in 2011, and the energy spectra of the albedo and captured components were determined in the 60 to 750 MeV range of energies. This work presents the results from measuring the antiproton flux in the Earth’s radiation belt according to the data of the PAMELA experiment, obtained over the period of the experiment, using improved algorithms for data processing and event selection.
- ПубликацияОткрытый доступDetermination of the primary energy using an ultrathin calorimeter(2020) Dmitrieva, E.; Fedosimova, A.; Lebedev, I.; Temiraliev, A.; Mayorov, A.; Майоров, Андрей ГеоргиевичAn approach for measuring energy of cosmic-ray particles with energies E > 10(12) eV using an ultrathin calorimeter is presented. The method is based on the analysis of the correlation dependence of the cascade size on the rate of development of the cascade process. In order to determine the primary energy, measurements are made based on the number of secondary particles in the cascade, N-e, at two observation levels Z(1) and Z(2), separated by an absorber layer. Based on the obtained measurements, a correlation analysis of the dependence of logN(e)(Z(1)) on th(e) difference dN = logN(e)(Z(1)) - logN(e)(Z(2)) is carried out. The correlation curves (logN(e) from dN) in the negative part of the dN axis are almost parallel to each other and practically do not depend on the depth of the cascade development. It makes it possible to determine the primary energy using an ultrathin calorimeter. The best option for applying the method is a calorimeter, which has a unit with a heavy target, leading to the rapid development of the cascade, and a homogeneous measuring and absorption block.
- ПубликацияОткрытый доступQuantum Mechanical Numerical Model for Interaction of Dark Atom with Atomic Nucleus of Matter(2025) Bikbaev, T.; Khlopov, M.; Mayorov, A.; Майоров, Андрей Георгиевич