The Nonlinear Evolution of Ion Cyclotron Waves in the Earth's Magnetosheath

被引：0
|
作者：
Guo Jun [1 ,2 ]
Yang Zhongwei [3 ]
Lu Quanming [2 ,3 ]
Wang Shui [3 ]
机构：
[1] Qingdao Univ Sci & Technol, Sch Math & Phys, Qingdao 266042, Peoples R China
[2] Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100080, Peoples R China
[3] Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China
来源：
PLASMA SCIENCE & TECHNOLOGY | 2009年 / 11卷 / 03期
基金：
中国国家自然科学基金;
关键词：
ion cyclotron wave; hybrid simulation; temperature anisotropy; PLASMA; ANISOTROPY; DAYSIDE; MIRROR; FIELD;
D O I：
暂无
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
With one-dimensional (1-D) hybrid simulations we investigate the nonlinear evolution of the ion cyclotron waves excited by the H+ and He2+ temperature anisotropies, and analyze the evolution by using the wavelet analysis method. The results show that the proton cyclotron waves with the dominant frequency higher than the helium gyro-frequency (Omega(He) = 0.5 Omega(p), with Omega(p) and Omega(He) the proton and helium gyro-frequencies respectively) are firstly excited, and then the helium cyclotron waves with the dominant frequency lower than the helium gyro-frequency are excited. The relation of our simulation results to the BIF (bifurcated) (there are two peaks in the wave spectrum: one above and one below Omega(He)) and CON (continuous) (continuous spectrum from 0.1 Omega(p) to 1.0 Omega(p)) wave spectra observed in the magnetosheath are discussed.
引用
收藏
页码：274 / 278
页数：5
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