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Long-term evolution of electron distribution function due to nonlinear resonant interaction with whistler mode waves

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journal contribution
posted on 16.04.2018, 13:50 authored by A.V. Artemyev, Anatoly NeishtadtAnatoly Neishtadt, Alexei Vasiliev, D. Mourenas
Accurately modelling and forecasting of the dynamics of the Earth’s radiation belts with the available computer resources represents an important challenge that still requires significant advances in the theoretical plasma physics field of wave–particle resonant interaction. Energetic electron acceleration or scattering into the Earth’s atmosphere are essentially controlled by their resonances with electromagnetic whistler mode waves. The quasi-linear diffusion equation describes well this resonant interaction for low intensity waves. During the last decade, however, spacecraft observations in the radiation belts have revealed a large number of whistler mode waves with sufficiently high intensity to interact with electrons in the nonlinear regime. A kinetic equation including such nonlinear wave–particle interactions and describing the long-term evolution of the electron distribution is the focus of the present paper. Using the Hamiltonian theory of resonant phenomena, we describe individual electron resonance with an intense coherent whistler mode wave. The derived characteristics of such a resonance are incorporated into a generalized kinetic equation which includes non-local transport in energy space. This transport is produced by resonant electron trapping and nonlinear acceleration. We describe the methods allowing the construction of nonlinear resonant terms in the kinetic equation and discuss possible applications of this equation.

Funding

Work of A.V.A., A.I.N., and A.A.V. was supported by Russian Scientific Fund (project no. 14-12-00824).

History

School

  • Science

Department

  • Mathematical Sciences

Published in

Journal of Plasma Physics

Volume

84

Citation

ARTEMYEV, A.V. ... et al, 2018. Long-term evolution of electron distribution function due to nonlinear resonant interaction with whistler mode waves. Journal of Plasma Physics, 84 (2), 905840206.

Publisher

© Cambridge University Press (CUP)

Version

AM (Accepted Manuscript)

Acceptance date

14/03/2018

Publication date

2018-04-05

Notes

This article has been published in a revised form in Journal of Plasma Physics https://doi.org/10.1017/S0022377818000260. This version is free to view and download for private research and study only. Not for re-distribution, re-sale or use in derivative works. © Cambridge University Press

ISSN

0022-3778

eISSN

1469-7807

Language

en

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