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	Evolving plasmasphere generating strong poloidal ULF wave after a magnetic storm
	Liu WL(刘文龙) ; Cao JB(曹晋滨) ; Li XL(李炘璘) ; Zong QG(宗秋刚) ; T.E.Sarris ; V.Angelopoulos
	2012
英文摘要	We investigate an event on the evolution of the plasmasphere and its effect on ULF wave generation observed by THEMIS satellites during three successive outbound passes.On September 13 2011 after a moderate magnetic storm,TH-D observed a sharp plasmapause at L=3.4 with a density drop from ~104cm-3 to ~50 cm-3.The plasmasphere starts to be refilled and expand on September 14th.On September 15th,a plasmapause boundary layer is created with two density drops at L=4.5 and 6.5,respectively.We show that strong Br and Ephi oscillations are observed within the two density drops,suggesting poloidal ULF wave.The even-mode signature and bump-on-tail plasma distribution at ~10keV favour the mechanism of drift-bounce resonance.All the above features suggest that the plasmasphere may have impact on the generation of ULF wave and potential impact on radiation belt acceleration.; 0
语种	英语
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/332014]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Liu WL,Cao JB,Li XL,et al. Evolving plasmasphere generating strong poloidal ULF wave after a magnetic storm. 2012-01-01.

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