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	Energetic particles observed in the cusp region during a storm recovery phase
	Fu, SY ; Zong, QG ; Pu, ZY ; Xiao, CJ ; Korth, A ; Daly, P ; Reme, H
	2005
关键词	cusp current sheet energetic particles ion composition stagnation region INTERPLANETARY MAGNETIC-FIELD OXYGEN-ION BURSTS RING CURRENT DISTANT MAGNETOTAIL CLUSTER MAGNETOPAUSE MODEL
英文摘要	In this paper we report energetic ion behavior and its composition variations observed by the Cluster/RAPID instrument when the spacecraft was travelling in the high latitude magnetospheric boundary region on the day of the 31 March, 2001, strongest magnetic storm in the past 50 years. The Dst index reached -360 nT at about 09:00 UT. During its early recovery phase, large amounts of oxygen and helium ions were observed; the ratio of oxygen to hydrogen in the RAPID energy range reached as high as 250%, which suggests that the observed energetic particles might be of magnetospheric origin. The observations further show that enhanced energetic electron fluxes are confined in a very narrow region, while protons have occupied a larger region, and heavy ions have been observed in an even larger region. The flux of energetic electrons show a slight enhancement in a region where the magnetic field magnitude is around zero. These observed energetic ions could be quasi-trapped by the current sheet in the stagnation region of the cusp.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000231157700010&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Geochemistry & Geophysics; SCI(E); EI; CPCI-S(ISTP); 2
语种	英语
DOI标识	10.1007/s10712-005-1881-5
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/156063]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Fu, SY,Zong, QG,Pu, ZY,et al. Energetic particles observed in the cusp region during a storm recovery phase. 2005-01-01.

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