气候变化领域集成服务门户(CCPortal): Particle-in-Cell Simulation of Electron Cyclotron Harmonic Waves Driven by a Loss Cone Distribution

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DOI	10.1029/2020GL087649
	Particle-in-Cell Simulation of Electron Cyclotron Harmonic Waves Driven by a Loss Cone Distribution
	Wu Y.; Tao X.; Liu X.; Chen L.; Xie H.; Liu K.; Horne R.B.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:9
英文摘要	Electron Cyclotron Harmonic (ECH) waves driven by a loss cone distribution are studied in this work by self-consistent particle-in-cell simulations. These waves have been suggested to play an important role in diffuse auroral precipitation in the outer magnetosphere. However, particle simulation of this instability is difficult because the saturation amplitude of the wave driven by a realistic size loss cone distribution is very small. In this work we use an extraordinarily large number of particles to reduce simulation noise so that the growth and saturation of ECH waves can be investigated. Our simulation results are consistent with linear theory in terms of growth rate, and with observation in terms of wave amplitude. We demonstrate that the heating of cold electrons is negligible and nonresonant, different from previous conclusions, and suggest that the saturation of the wave is caused by the filling of the loss cone of hot electrons. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Electrons; Hot electrons; Magnetosphere; Particle beam dynamics; Rockets; Cold electrons; Electron cyclotron harmonic; Electron cyclotron harmonic waves; Linear theory; Particle simulations; Particle-in-cell simulations; Simulation noise; Wave amplitudes; Cyclotrons; electron; heat wave; instability; linear programing; magnetosphere; simulation
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/170377
作者单位	CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Sciences, University of Science and Technology of China, Hefei, China; CAS Center for Excellence in Comparative Planetology, Hefei, China; Anhui Mengcheng Geophysics National Observation and Research Station, Mengcheng, China; Department of Physics, University of Texas at Dallas, Dallas, TX, United States; Hebei Key Laboratory of Compact Fusion, Langfang, China; ENN Science and Technology Development Co., Ltd., Langfang, China; Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, China; British Antarctic Survey, Cambridge, United Kingdom
推荐引用方式 GB/T 7714	Wu Y.,Tao X.,Liu X.,et al. Particle-in-Cell Simulation of Electron Cyclotron Harmonic Waves Driven by a Loss Cone Distribution[J],2020,47(9).
APA	Wu Y..,Tao X..,Liu X..,Chen L..,Xie H..,...&Horne R.B..(2020).Particle-in-Cell Simulation of Electron Cyclotron Harmonic Waves Driven by a Loss Cone Distribution.Geophysical Research Letters,47(9).
MLA	Wu Y.,et al."Particle-in-Cell Simulation of Electron Cyclotron Harmonic Waves Driven by a Loss Cone Distribution".Geophysical Research Letters 47.9(2020).