DOI: 10.1029/2017JA025050
Scopus记录号: 2-s2.0-85050316686
论文题名: Nonlinear Dynamics of Radiation Belt Electrons Interacting With Chorus Emissions Localized in Longitude
作者: Kubota Y. ; Omura Y.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 6 起始页码: 4835
结束页码: 4857
语种: 英语
英文关键词: chorus
; nonlinear wave-particle interaction
; particle acceleration
; radiation belts
; relativistic electrons
; simulation
英文摘要: Using results of test particle simulations of electrons interacting with whistler mode chorus emissions, we numerically obtain Green's functions to model evolution of the electron distribution function after all of the possible interactions with the waves. In both wave models with and without subpackets, electrons undergoing the cyclotron resonance with the waves are efficiently accelerated by nonlinear wave trapping. Since the strong modulation of the wave amplitude (in the case of the waves with subpackets) affects dynamics of resonant electrons, the electrons are detrapped from the wave potential or entrapped into it more frequently than those interacting with the waves without subpackets. As a result of interaction with the waves with subpackets, the number of electrons undergoing the acceleration is increased, while the acceleration efficiency in energy is decreased because of shorter interaction time. Modifying the numerical Green's function method with the simplified model of chorus waves uniform in longitude (Omura et al., 2015, https://doi.org/10.1002/2015JA021563), we compute the formation process of the outer radiation belt electron fluxes induced by the interaction with the chorus waves localized in longitude occurring for a time scale of 1 hr. The formation of MeV electron fluxes is characterized by large acceleration rates and butterfly pitch angle distributions, which are found in satellite observation results. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113750
Appears in Collections: 气候减缓与适应
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作者单位: Research Institute for Sustainable Humanosphere, Kyoto University, Kyoto, Japan
Recommended Citation:
Kubota Y.,Omura Y.. Nonlinear Dynamics of Radiation Belt Electrons Interacting With Chorus Emissions Localized in Longitude[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(6)