NSSC OpenIR  > 空间科学部
Alternative TitleLow-frequency electromagnetic instabilities in a collisionless current sheet:magnetohydrodynamic model
魏新华; 周国成; 曹晋滨; 李柳元; 北京8701信箱
Source Publication物理学报
Keyword无碰撞电流片 磁流体力学 色散关系 不稳定性
Other AbstractLow_frequency electromagnetic instabilities in a collisionless current sheet are discussed by using the 3_dimensional,collisionless and compressible magnetohydrodynamic model with the isotropic pressure.The linear dispersion relations are numerically solved at the middle plane ( z =0) and edges ( z =1) of the current sheet for modes of 2_and 3_dimensional propagation.The main results are as follows.(1) For 2_dimensional disturbed propagation ( k z=0) ,at the middle plane ( z =0),the growth rate of Alfven waves is maximum, and the frequency and the wavenumber region of unstable waves are widest. The farther the distance from the middle plane, the smaller the growth rate and the wavenumber legion. As the ion-inertial length becomes longer, the growth rate of Alfven waves becomes larger. ( 2 ) For 3-dimensional disturbed propagation(kz≠0 ),whistler waves are unstable.At the current sheet middle plane,whistlerwaves have an obvious growth rate.0utside the ion-inertial region, the growth rate of whistler waves becomes larger. ( 3 ) At the middle plane(z=0) , low-frequency waves are mainly excited by the current-driven instabilities. At places far from the middle plane, the gradient instabilities of the current, density and pressure become more important.
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
魏新华,周国成,曹晋滨,等. 无碰撞电流片低频电磁模不稳定性MHD模型[J]. 物理学报,2005,54(7):3228-3235.
APA 魏新华,周国成,曹晋滨,李柳元,&北京8701信箱.(2005).无碰撞电流片低频电磁模不稳定性MHD模型.物理学报,54(7),3228-3235.
MLA 魏新华,et al."无碰撞电流片低频电磁模不稳定性MHD模型".物理学报 54.7(2005):3228-3235.
Files in This Item: Download All
File Name/Size DocType Version Access License
20055473228.pdf(800KB) 开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[魏新华]'s Articles
[周国成]'s Articles
[曹晋滨]'s Articles
Baidu academic
Similar articles in Baidu academic
[魏新华]'s Articles
[周国成]'s Articles
[曹晋滨]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[魏新华]'s Articles
[周国成]'s Articles
[曹晋滨]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 20055473228.pdf
Format: Adobe PDF
This file does not support browsing at this time
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.