Muon Bundles As a Tool for Studying Cosmic-Ray Anisotropy

A new method for studying cosmic ray anisotropy by means of muon bundle detection at the Earth’s surface is described. An important advantage of this method is a simple way to compensate the atmospheric effects in the counting rate of muon bundles. Seasonal and diurnal variations of the muon bundle counting rate are almost completely eliminated by using only one atmospheric parameter. For the first time, the muon multiplicity in the detected bundles was used to estimate the dependence of the anisotropy amplitude on the primary energy. Parameters of the cosmic ray dipole anisotropy were obtained for two average logarithmic values of primary energies of 1 and 5 PeV.

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Publication Details

Journal
Moscow University Physics Bulletin
Published
2024-12-01
DOI
https://doi.org/10.3103/s0027134924701145
Primary Topic
Astrophysics and Cosmic Phenomena
Type
article
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article

Muon Bundles As a Tool for Studying Cosmic-Ray Anisotropy

M. B. Amelchakov, К. Г. Компаниец, А. А. Петрухин, G. Trinchero et al.
Moscow University Physics Bulletin
Astrophysics and Cosmic Phenomena
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Muon Bundles As a Tool for Studying Cosmic-Ray Anisotropy

M. B. Amelchakov, К. Г. Компаниец, А. А. Петрухин, G. Trinchero, A. N. Dmitrieva, V. V. Shutenko, I. A. Shulzhenko, R. P. Kokoulin, I. I. Yashin, A. Chiavassa, A. G. Bogdanov, S. S. Khokhlov, G. Mannocchi, E. A. Yurina
article en

Abstract

A new method for studying cosmic ray anisotropy by means of muon bundle detection at the Earth’s surface is described. An important advantage of this method is a simple way to compensate the atmospheric effects in the counting rate of muon bundles. Seasonal and diurnal variations of the muon bundle counting rate are almost completely eliminated by using only one atmospheric parameter. For the first time, the muon multiplicity in the detected bundles was used to estimate the dependence of the anisotropy amplitude on the primary energy. Parameters of the cosmic ray dipole anisotropy were obtained for two average logarithmic values of primary energies of 1 and 5 PeV.

Moscow University Physics BulletinVol. 79(S1)
Istituto Nazionale di Fisica Nucleare, Sezione di Torino (IT), Osservatorio Astrofisico di Torino (IT), University of Turin (IT), National Research Nuclear University MEPhI (RU)
Openalex Percentile: Top 93%
Astrophysics and Cosmic Phenomena
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