EXCITATION OF KINETIC ALFVEN WAVES BY DENSITY STRIATION IN MAGNETO-PLASMAS

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 太阳和太阳系等离子体研究团组

	EXCITATION OF KINETIC ALFVEN WAVES BY DENSITY STRIATION IN MAGNETO-PLASMAS
	Wu, D. J.; Chen, L.
刊名	ASTROPHYSICAL JOURNAL
	2013-07-01
卷号	771 期号:1 页码:112PP
关键词	instabilities magnetic fields plasmas Sun: corona waves
ISSN号	0004-637X
通讯作者	Wu, DJ (reprint author), Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China. Email: clvslc214@pmo.ac.cn
英文摘要	Field-aligned density striation is one of the most common inhomogeneity phenomena in magneto-plasmas, such as in the solar coronal plasma and terrestrial auroral plasma. Kinetic Alfven waves (KAWs) can play an important role in the inhomogeneous heating of coronal magneto-plasmas as well as in the local acceleration of auroral energetic electrons. In this paper, we study the dispersion and instability of KAWs in a magneto-plasma with density striation structures. Results show that KAWs become unstable in the presence of the density striation and the corresponding instability has a maximal growth rate at the perpendicular wavelength close to the spatial scale of the density gradient. Related experimental phenomena in both laboratory and space plasmas are discussed. It is suggested that the excitation of KAWs by the density striation of magneto-plasmas can be of potential importance in understanding the physics of the formation of magneto-plasma filaments and their heating mechanisms, which are often present in the terrestrial auroral plasma, the solar coronal plasma, and other astrophysical plasmas.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	SOLAR CORONAL LOOPS ; MAGNETOHYDRODYNAMIC TURBULENCE ; ASTROPHYSICAL GYROKINETICS ; NONLINEAR-INTERACTION ; HOSE INSTABILITY ; FINE-STRUCTURE ; BETA PLASMAS ; HEAVY-IONS ; FIELDS ; DISSIPATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000321274200003
公开日期	2014-01-08
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/9871]
专题	紫金山天文台_太阳和太阳系等离子体研究团组
作者单位	Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Wu, D. J.,Chen, L.. EXCITATION OF KINETIC ALFVEN WAVES BY DENSITY STRIATION IN MAGNETO-PLASMAS[J]. ASTROPHYSICAL JOURNAL,2013,771(1):112PP.
APA	Wu, D. J.,&Chen, L..(2013).EXCITATION OF KINETIC ALFVEN WAVES BY DENSITY STRIATION IN MAGNETO-PLASMAS.ASTROPHYSICAL JOURNAL,771(1),112PP.
MLA	Wu, D. J.,et al."EXCITATION OF KINETIC ALFVEN WAVES BY DENSITY STRIATION IN MAGNETO-PLASMAS".ASTROPHYSICAL JOURNAL 771.1(2013):112PP.