中国科学院紫金山天文台机构知识库
Advanced  
PMO OpenIR  > 太阳和太阳系等离子体研究团组  > 期刊论文
题名: A possible mechanism for the formation of filamentous structures in magnetoplasmas by kinetic Alfven waves
作者: Chen Ling(陈玲)1, 2, 3; Wu, D. J.1, 2; Zhao, G. Q.1, 2, 4; Tang, J. F.5; Huang, J.3
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
出版日期: 2015
卷号: 120, 期号:1, 页码:61-69
关键词: instabilities ; plasma ; waves
学科分类: 天文和天体物理
DOI: 10.1002/2014JA020742
文章类型: Article
英文摘要: Due to having strong anisotropy in their polarization state and spatial structure, it is believed that kinetic Alfven waves (KAWs) can play an important role in various energization phenomena of plasma particles and the fine-structure formation in magnetoplasma environments. The filamentous fine structures are a kind of the common density inhomogeneity phenomena in magnetoplasmas, and hence, the density gradient is one of the sources of free energy that can lead to KAWs instabilities. In this paper, based on the two-fluid model in which ions and electrons are treated as separate fluids, we investigate the effect of density gradient inhomogeneous on the dispersion and instability of KAWs in a magnetoplasma. The results show that KAW instability can be excited effectively by the density gradient. Especially, both the real frequency (R) and the growth rate (I) of KAWs are dramatically dependent on the spatial position x in the presence of an inhomogeneous density gradient. The results also show that the real frequency increases with the characteristic spatial scale of inhomogeneity k(0)(-1), while the growth rate of KAWs has a maximum in the growing ranges of k(0)(-1). On the other hand, the excited KAWs are weakly dispersive with (e)k(x)<1. The results have potential importance for a better understanding of the microphysics of the filamentous fine-structure formation since the phenomena of density gradient inhomogeneous are ubiquitous in various magnetoplasmas, such as in the laboratory plasma as well as in both the solar coronal and terrestrial auroral plasmas.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: FIELD-ALIGNED CURRENTS ; SOLAR CORONAL LOOPS ; INTERSTELLAR TURBULENCE ; ELECTRON ACCELERATION ; INSTABILITY DRIVEN ; HOSE INSTABILITY ; MAGNETIC-FIELD ; BETA-PLASMA ; EXCITATION ; RESONANCE
收录类别: SCI
所属项目名称: PMO_LIB-IR
语种: 英语
WOS记录号: WOS:000349891300005
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/14841
Appears in Collections:太阳和太阳系等离子体研究团组_期刊论文

Files in This Item:
File Name/ File Size Content Type Version Access License
2015116.pdf(438KB)----限制开放View 联系获取全文

作者单位: 1.Chinese Acad Sci, Purple Mt Observ, Nanjing, Jiangsu, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Key Lab Planetary Sci, Nanjing, Jiangsu, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing, Peoples R China
4.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
5.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi, Peoples R China
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Chen, L.]'s Articles
[Wu, D. J.]'s Articles
[Zhao, G. Q.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Chen, L.]‘s Articles
[Wu, D. J.]‘s Articles
[Zhao, G. Q.]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: 2015116.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

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

 

 

Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院紫金山天文台 - Feedback
Powered by CSpace