Electron pitch-angle diffusion: resonant scattering by waves vs. nonadiabatic effects

In this paper we investigate the electron pitch-angle diffusion coefficients in the night-side inner magnetosphere around the geostationary orbit (L ~ 7) due to magnetic field deformation. We compare the effects of resonant wave-particle scattering by lower band chorus waves and the adiabaticity vio...

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Published inAnnales geophysicae (1988) Vol. 31; no. 9; pp. 1485 - 1490
Main Authors Artemyev, A V, Orlova, K G, Mourenas, D, Agapitov, O V, Krasnoselskikh, V V
Format Journal Article
LanguageEnglish
Published Katlenburg-Lindau Copernicus GmbH 05.09.2013
Copernicus Publications
Subjects
Curvature
Diffusion
Diffusion coefficient
Electron scattering
Electrons
Magnetic fields
Magnetosphere
Mathematical analysis
Orbits
Scattering
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Summary:In this paper we investigate the electron pitch-angle diffusion coefficients in the night-side inner magnetosphere around the geostationary orbit (L ~ 7) due to magnetic field deformation. We compare the effects of resonant wave-particle scattering by lower band chorus waves and the adiabaticity violation of electron motion due to the strong curvature of field lines in the vicinity of the equator. For a realistic magnetic field configuration, the nonadiabatic effects are more important than the wave-particle interactions for high energy (> 1 MeV) electrons. For smaller energy, the scattering by waves is more effective than nonadiabatic one. Moreover, the role of nonadiabatic effects increases with particle energy. Therefore, to model electron scattering and transport in the night-side inner magnetosphere, it is important to take into account the peculiarities of high-energy electron dynamics.
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ISSN:1432-0576
0992-7689
1432-0576
DOI:10.5194/angeo-31-1485-2013