Open AccessInteraction between long-period ULF waves and charged particle in the magnetosphere: theory and observations (overview)
Author(s) -
D. Yu. Klimushkin,
P. N. Mager,
Максим Челпанов,
Данила Костарев
Publication year - 2021
Publication title -
solar-terrestrial physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.11
H-Index - 2
ISSN - 2500-0535
DOI - 10.12737/stp-74202105
Subject(s) - physics , magnetosphere , gyroradius , particle acceleration , computational physics , van allen radiation belt , geophysics , ultra low frequency , wave–particle duality , electromagnetic radiation , resonance (particle physics) , quantum electrodynamics , classical mechanics , magnetic field , acceleration , atomic physics , optics , quantum mechanics , astronomy
The paper reviews the current state of the problem of interaction between long-period ultra-low-frequency (ULF) waves and high-energy particles. We consider elements of the theory of energy exchange between waves and particles, particle transport across magnetic shells under the influence of the electromagnetic field of a wave, the acceleration of radiation belt particles by both resonant and non-resonant mechanisms. We examine the mechanisms of generation of azimuthally-small-scale ULF waves due to instabilities arising from the wave–particle resonance. The cases of Alfvén, drift-compressional, and drift-mirror waves are analyzed. It is noted that due to the lack of a detailed theory of drift-mirror modes, the possibility of their existence in the magnetosphere cannot be taken as a proven fact. We summarize experimental data on the poloidal and compression ULF waves generated by unstable populations of high-energy particles. We investigate the mechanisms of modulation of energetic particle fluxes by ULF waves and possible observational manifestations of such modulation. Methods of studying the structure of waves across magnetic shells by recording fluxes of resonant particles with a finite Larmor radius are discussed.