Recent progress in nonlinear kinetic Alfven waves

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

	Recent progress in nonlinear kinetic Alfven waves
	Wu, DJ; Chao, JK
刊名	NONLINEAR PROCESSES IN GEOPHYSICS
	2004
卷号	11 期号:5-6 页码:631-645
关键词	LOW-BETA-PLASMA AURORAL ELECTRON ACCELERATION ION-ACOUSTIC-WAVES SOLITARY WAVES HIGH-LATITUDE 3-DIMENSIONAL STABILITY PARTICLE-ACCELERATION DOUBLE-LAYERS IONOSPHERE TEMPERATURE
ISSN号	1023-5809
英文摘要	This paper presents a review of recent progress in nonlinear kinetic Alfven wave (KAW hereafter). We start with the two-fluid theory of KAWs and show how the difference between the motions of electrons and ions in small-scale fields of KAWs modifies the Alfven wave properties. Then, we focus on nonlinear solitary structures of KAWs. A general criterion of the existence for solitary KAW (SKAW hereafter) and its exact analytical solution in a low-beta plasma (beta < m(e)/m(i)) are presented, where the electron drift velocity along the, background magnetic field is larger than the thermal speed within a SKAW, and hence can excite, for instance, ion acoustic turbulence as showed by in situ observations of satellite. in space plasmas. In consequence, the turbulence results in kinetic dissipation of the SKAW and dynamical evolution in its structure. We further discuss the structure of the dissipated SKAW (DSKAW hereafter) that evolves from the SKAW due to the dissipation. The result shows that the DSKAW has a local shock-like structure in its density profile and a net electric potential drop over the shock-like structure. In particular, the electric potential drop of the DSKAW can be expected to accelerate electrons efficiently to the order of the loca Alfven speed. The application of the DSKAW acceleration mechanism to the auroral electron acceleration is also discussed. Finally, a few perspectives of KAW studies in future are presented.
学科主题	Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences
研究领域[WOS]	Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences
关键词[WOS]	LOW-BETA-PLASMA ; AURORAL ELECTRON ACCELERATION ; ION-ACOUSTIC-WAVES ; SOLITARY WAVES ; HIGH-LATITUDE ; 3-DIMENSIONAL STABILITY ; PARTICLE-ACCELERATION ; DOUBLE-LAYERS ; IONOSPHERE ; TEMPERATURE
收录类别	SCI
语种	英语
WOS记录号	WOS:000226836600011
公开日期	2012-12-22
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/7762]
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	1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.NCU, Inst Space Sci, Chungli 32001, Taiwan
推荐引用方式 GB/T 7714	Wu, DJ,Chao, JK. Recent progress in nonlinear kinetic Alfven waves[J]. NONLINEAR PROCESSES IN GEOPHYSICS,2004,11(5-6):631-645.
APA	Wu, DJ,&Chao, JK.(2004).Recent progress in nonlinear kinetic Alfven waves.NONLINEAR PROCESSES IN GEOPHYSICS,11(5-6),631-645.
MLA	Wu, DJ,et al."Recent progress in nonlinear kinetic Alfven waves".NONLINEAR PROCESSES IN GEOPHYSICS 11.5-6(2004):631-645.