Electron Scattering, Transport and Energization by Alfvenic Turbulence in Earth's Outer Radiation Belt

被引：3

作者：

Chaston, C. C. ^{[1
]}

机构：

[1] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2023年 / 50卷 / 13期

关键词：

Alfeven waves; turbulence; radiation belts; geomagnetic storms; particle acceleration; particle transport; WAVES; ACCELERATION; RESONANCES; MARCH;

D O I：

10.1029/2023GL104243

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The transport of energetic electrons immersed in Alfvenic turbulence in Earth's outer radiation belt is explored. It is shown how electrons subject to the action of an empirically derived 3-D spectrum of Alfvenic field fluctuations experience rapid transport across L-shells, pitch-angle and through momentum space. Timescales for radial transport are less than a drift period while scattering at large pitch-angle occurs at a similar rate. Transport through momentum space occurs at a rate comparable to that in whistler mode chorus and is particularly rapid below 100 keV. Bounce-averaged transport coefficients for these processes are consistent with quasi-linear estimates for drift-bounce resonances, albeit with enhanced values. A super-diffusive to sub-diffusive transition with increasing energy is identified.

引用

页数：10

共 28 条

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