Abstract
A model is created of the motion of galactic cosmic ray particles in the Earth’s magnetosphere, as defined by the IGRF and CHAOS models of the magnetic field. A second model contains a lithospheric field component that is missing from the first model. Power spectra are obtained for the flux of galactic cosmic rays at a fixed height above the Earth’s surface, and a difference is discovered at high orders of multipole expansion \(l > 7\). When \(l > 20\), the result can be explained by the contribution from the lithospheric component of the magnetic field in the CHAOS model, relative to the IGRF. When \(l \leqslant 20\), it can be explained by the difference in the accuracy of describing the main field, since the IGRF is limited to the 13th order of expansion.
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Funding
This work was supported by the Russian Science Foundation, grant no. 19-72-10161, https://rscf.ru/project/19-72-10161/.
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Translated by M. Samokhina
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Proshin, S.A., Golubkov, V.S., Mayorov, A.G. et al. Propagation of Cosmic Ray Particles in the Earth’s Magnetic Field, as Defined by the IGRF and CHAOS Models. Bull. Russ. Acad. Sci. Phys. 88, 419–421 (2024). https://doi.org/10.1134/S1062873823705615
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DOI: https://doi.org/10.1134/S1062873823705615