On the kinetic nature of dipolarization fronts produced by interchange instability in the magnetotail

doi:10.6038/cjg2018K0691

	On the kinetic nature of dipolarization fronts produced by interchange instability in the magnetotail
	Lu HaoYu 1,2; Li Yun 1; Ge YaSong 3
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2018-02-01
卷号	61 期号:2 页码:403-410
关键词	Dipolarization fronts Interchange instability Hall MHD Finite Larmor radius effect Numerical simulation
ISSN号	0001-5733
DOI	10.6038/cjg2018K0691
文献子类	Article
英文摘要	A two-dimensional extended MHD simulation, including Hall effect and finite Larmor radius (FRL) effect, is performed to study the kinetic nature of dipolarization fronts (DFs) in the scale of the ion inertial length/ion Larmor radius. The DF is self-consistently produced by the interchange instability, arising due to the force imbalance between the tailward gradient of thermal pressure and Earthward magnetic curvature force in the near-Earth region. Numerical investigations indicate that the DF is a tangential discontinuity, which means that the normal plasma velocity across the DF should be zero in the reference system that is static with the DF structure. Hall effect arising in the scale of ion inertial length determines the electric system, including electric field and current. Hall effect mainly contributes on the electric field normal to the tangent plane of the DF, increases the current along the tangent plane of the DF, but also makes the DF structure asymmetric. The drifting motion of the large-scale DF structure is determined by the FLR effect arising in the scale of ion Larmor radius. The ion magnetization velocity induced by the FLR effect is towards to duskward at the subsolar point of the DF, but the dawnward component of velocity in the region after the DF is increased, which dominantly results in the drifting motion of the whole mushroom structure towards the dawn.
WOS关键词	BURSTY BULK FLOWS ; HIGH-SPEED FLOWS ; PLASMA SHEET ; TRANSPORT ; CLUSTER ; WAVES
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000425840900001
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82856]
专题	中国科学院地质与地球物理研究所
通讯作者	Lu HaoYu
作者单位	1.Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China 2.Chinese Acad Sci, Macau Univ Sci & Technol, Lunar & Planetary Sci Lab, Key Lab Lunar & Deep Space Explorat,Partner Lab, Macau, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Lu HaoYu,Li Yun,Ge YaSong. On the kinetic nature of dipolarization fronts produced by interchange instability in the magnetotail[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2018,61(2):403-410.
APA	Lu HaoYu,Li Yun,&Ge YaSong.(2018).On the kinetic nature of dipolarization fronts produced by interchange instability in the magnetotail.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,61(2),403-410.
MLA	Lu HaoYu,et al."On the kinetic nature of dipolarization fronts produced by interchange instability in the magnetotail".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 61.2(2018):403-410.