气候变化领域集成服务门户(CCPortal): Direct Evidence of the Pitch Angle Scattering of Relativistic Electrons Induced by EMIC Waves

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DOI	10.1029/2019GL085637
	Direct Evidence of the Pitch Angle Scattering of Relativistic Electrons Induced by EMIC Waves
	Zhu H.; Chen L.; Claudepierre S.G.; Zheng L.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:4
英文摘要	In this study, we analyze an electromagnetic ion cyclotron (EMIC) wave event of rising tone elements recorded by the Van Allen Probes. The pitch angle distributions of relativistic electrons exhibit a direct response to the two elements of EMIC waves: at the intermediate pitch angle, the fluxes are lower; and at the low pitch angle, the fluxes are higher than those when no EMIC was observed. In particular, the observed changes in the pitch angle distributions are most likely to be caused by nonlinear wave-particle interaction. The calculation of the minimum resonant energy and a test-particle simulation based on the observed EMIC waves support the role of the nonlinear wave-particle interaction in the pitch angle scattering. This study provides direct evidence for the nonlinear pitch angle scattering of electrons by EMIC waves. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Electron cyclotron resonance; Particle interactions; Probes; Wave plasma interactions; Direct response; Ion cyclotrons; Nonlinear pitch; Nonlinear waves; Pitch angle distribution; Pitch-angle scattering; Relativistic electron; Resonant energy; Plasma theory; electromagnetic radiation; electron; nonlinearity; probe; scattering; testing method
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/170650
作者单位	Center for Space Sciences, University of Texas at Dallas, Richardson, TX, United States; The Aerospace Corporation, El Segundo, CA, United States; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States
推荐引用方式 GB/T 7714	Zhu H.,Chen L.,Claudepierre S.G.,et al. Direct Evidence of the Pitch Angle Scattering of Relativistic Electrons Induced by EMIC Waves[J],2020,47(4).
APA	Zhu H.,Chen L.,Claudepierre S.G.,&Zheng L..(2020).Direct Evidence of the Pitch Angle Scattering of Relativistic Electrons Induced by EMIC Waves.Geophysical Research Letters,47(4).
MLA	Zhu H.,et al."Direct Evidence of the Pitch Angle Scattering of Relativistic Electrons Induced by EMIC Waves".Geophysical Research Letters 47.4(2020).