Cosmic ray particles propagation in the Earth’s magnetic field defined with IGRF and CHAOS models

S. A. Proshin; Прошин С. А.; V. S. Golubkov; Голубков В. С.; A. G. Mayorov; Майоров А. Г.; V. V. Malakhov; Малахов В. В.

doi:10.31857/S0367676524030202

Cosmic ray particles propagation in the Earth’s magnetic field defined with IGRF and CHAOS models

Autores: Proshin S.A.¹, Golubkov V.S.¹, Mayorov A.G.¹, Malakhov V.V.¹
Afiliações:
1. MEPhI National Nuclear Research University
Edição: Volume 88, Nº 3 (2024)
Páginas: 491-494
Seção: Physics of Cosmic Rays
URL: https://journal-vniispk.ru/0367-6765/article/view/267681
DOI: https://doi.org/10.31857/S0367676524030202
EDN: https://elibrary.ru/QLBLFR
ID: 267681

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We simulated the galactic cosmic rays’ particles propagation in the Earth’s magnetosphere, given by the IGRF and CHAOS magnetic field models, while the second of them additionally has a lithospheric field component that is absent in the first model. The power spectra of the flux of galactic cosmic rays at a fixed height above the Earth’s surface are obtained and their difference is found for large orders of the multipole expansion, l > 7. For l > 20, the result can be explained by the contribution of the lithospheric component of the magnetic field in the CHAOS model compared to IGRF, and for l > 20, the difference in the accuracy of the description of the main field, since IGRF is limited to the 13th order of expansion.

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Bibliografia

Шутенко В.В., Астапов И.И., Барбашина Н.С. и др. // Изв. РАН. Сер. физ. 2017. Т. 81. № 2. С. 213; Shutenko V.V., Astapov I.I., Barbashina N.S. et al. // Bull. Russ. Acad. Sci. Phys. 2017. V. 81. No. 2. P. 194.
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Finlay C.C., Kloss C., Olsen N. et al. // Earth. Planets Space. 2020. V. 72. Art. No. 156.
Голубков В.С., Майоров А.Г. // Изв. РАН. Сер. физ. 2021. Т. 85. № 4. С. 512; Golubkov V.S., Mayorov A.G. // Bull. Russ. Acad. Sci. Phys. 2021. V. 85. No. 4. P. 383.
Mao H., Richard W. // Proc. 42nd AIAA Plasma Dynam. Lasers Conf. (Honolulu, 2011). Art. No. 3739.
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https://healpy.readthedocs.io/en/latest/generated/healpy.sphtfunc.map2alm.html#healpy.sphtfunc.map2alm.

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2. Fig. 1. Map of g(p) values for the IGRF field model at an altitude of 350 km with the number of pixels on the map equal to 2700. Particles of all energies were taken into account