气候变化领域集成服务门户(CCPortal): Unraveling the Formation Mechanism for the Bursts of Electron Butterfly Distributions: Test Particle and Quasilinear Simulations

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DOI	10.1029/2020GL090749
	Unraveling the Formation Mechanism for the Bursts of Electron Butterfly Distributions: Test Particle and Quasilinear Simulations
	Gan L.; Li W.; Ma Q.; Artemyev A.V.; Albert J.M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:21
英文摘要	Energetic electron dynamics is highly affected by plasma waves through quasilinear and/or nonlinear interactions in the Earth's inner magnetosphere. In this letter, we provide physical explanations for a previously reported intriguing event from the Van Allen Probes observations, where bursts of electron butterfly distributions at tens of keV exhibit remarkable correlations with chorus waves. Both test particle and quasilinear simulations are used to reveal the formation mechanism for the bursts of electron butterfly distribution. The test particle simulation results indicate that nonlinear phase trapping due to chorus waves is the key process to accelerate electrons to form the electron butterfly distribution within ~30 s, and reproduces the observed features. Quasilinear simulation results show that although the diffusion process alone also contributes to form the electron butterfly distribution, the timescale is slower. Our study demonstrates the importance of nonlinear interaction in rapid electron acceleration at tens of keV by chorus waves. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Atmospherics; Electromagnetic waves; Kinetic theory; Magnetosphere; Diffusion process; Electron acceleration; Energetic electron; Formation mechanism; Inner magnetosphere; Nonlinear interactions; Nonlinear phase; Quasilinear simulations; Electrons; electron density; electron probe analysis; formation mechanism; particle motion; plasma; timescale; wave propagation; Papilionoidea
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169528
作者单位	Center for Space Physics, Boston University, Boston, MA, United States; Department of Atmospheric and Oceanic Sciences, University of Los Angeles, Los Angeles, CA, United States; Department of Earth, Planetary, and Space Sciences, University of Los Angeles, Los Angeles, CA, United States; Air Force Research Laboratory, Kirtland Air Force Base, Albuquerque, NM, United States
推荐引用方式 GB/T 7714	Gan L.,Li W.,Ma Q.,et al. Unraveling the Formation Mechanism for the Bursts of Electron Butterfly Distributions: Test Particle and Quasilinear Simulations[J],2020,47(21).
APA	Gan L.,Li W.,Ma Q.,Artemyev A.V.,&Albert J.M..(2020).Unraveling the Formation Mechanism for the Bursts of Electron Butterfly Distributions: Test Particle and Quasilinear Simulations.Geophysical Research Letters,47(21).
MLA	Gan L.,et al."Unraveling the Formation Mechanism for the Bursts of Electron Butterfly Distributions: Test Particle and Quasilinear Simulations".Geophysical Research Letters 47.21(2020).