Near-Earth injection of MeV electrons associated with intense dipolarization electric fields: Van Allen Probes observations

	Near-Earth injection of MeV electrons associated with intense dipolarization electric fields: Van Allen Probes observations
	Dai, Lei; Wang, Chi; Duan, Suping; He, Zhaohai; Wygant, John R.; Cattell, Cynthia A.; Tao, Xin; Su, Zhenpeng; Kletzing, Craig; Baker, Daniel N.
刊名	GEOPHYSICAL RESEARCH LETTERS
	2015
卷号	42 期号:15 页码:6170-6179
关键词	substorm injection substorm dipolarization radiation belt electrons electric fields
ISSN号	0094-8276
通讯作者	Dai, L (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China.
英文摘要	Substorms generally inject tens to hundreds of keV electrons, but intense substorm electric fields have been shown to inject MeV electrons as well. An intriguing question is whether such MeVelectron injections can populate the outer radiation belt. Here we present observations of a substorm injection of MeV electrons into the inner magnetosphere. In the premidnight sector at L approximate to 5.5, Van Allen Probes (Radiation Belt Storm Probes)-A observed a large dipolarization electric field (50mV/m) over approximate to 40s and a dispersionless injection of electrons up to approximate to 3MeV. Pitch angle observations indicated betatron acceleration of MeV electrons at the dipolarization front. Corresponding signals of MeV electron injection were observed at LANL-GEO, THEMIS-D, and GOES at geosynchronous altitude. Through a series of dipolarizations, the injections increased the MeV electron phase space density by 1 order of magnitude in less than 3h in the outer radiation belt (L > 4.8). Our observations provide evidence that deep injections can supply significant MeV electrons.
收录类别	SCI ; EI
语种	英语
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/4564]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Dai, Lei,Wang, Chi,Duan, Suping,et al. Near-Earth injection of MeV electrons associated with intense dipolarization electric fields: Van Allen Probes observations[J]. GEOPHYSICAL RESEARCH LETTERS,2015,42(15):6170-6179.
APA	Dai, Lei.,Wang, Chi.,Duan, Suping.,He, Zhaohai.,Wygant, John R..,...&Tang, Xiangwei.(2015).Near-Earth injection of MeV electrons associated with intense dipolarization electric fields: Van Allen Probes observations.GEOPHYSICAL RESEARCH LETTERS,42(15),6170-6179.
MLA	Dai, Lei,et al."Near-Earth injection of MeV electrons associated with intense dipolarization electric fields: Van Allen Probes observations".GEOPHYSICAL RESEARCH LETTERS 42.15(2015):6170-6179.