globalchange  > 气候减缓与适应
DOI: 10.1002/grl.50537
论文题名:
Observation of multiple sub-cavities adjacent to single separatrix
作者: Wang R.; Du A.; Nakamura R.; Lu Q.; Khotyaintsev Y.V.; Volwerk M.; Zhang T.; Kronberg E.A.; Daly P.W.; Fazakerley A.N.
刊名: Geophysical Research Letters
ISSN: 0094-8915
EISSN: 1944-8646
出版年: 2013
卷: 40, 期:11
起始页码: 2511
结束页码: 2517
语种: 英语
英文关键词: density cavity ; magnetic reconnection ; separatrix ; sub-cavity
Scopus关键词: Density cavity ; Electron acceleration ; Hall magnetic reconnection ; Magnetic reconnections ; Parallel electric fields ; Separatrix ; Strong electric fields ; sub-cavity ; Carrier concentration ; Electric fields ; Electron density measurement ; Electrons ; Plasmas ; atmospheric electricity ; cavity ; diffusion ; electron ; magnetotail
英文摘要: We investigate a direct south-north crossing of a reconnection ion diffusion region in the magnetotail. During this crossing, multiple electron density dips with a further density decrease within the cavity, called sub-cavities, adjacent to the northern separatrix are observed. The correlation between electron density sub-cavities and strong electric field fluctuations is obvious. Within one of the sub-cavities, a series of very strong oscillating perpendicular electric field and patchy parallel electric field are observed. The parallel electric field is nearly unipolar and directs away from X line. In the same region, inflow electrons with energy up to 100 keV are injected into the X line. Based on the observations, we conclude that the high-energy inflowing electrons are accelerated by the patchy parallel electric field. Namely, electrons have been effectively accelerated while they are flowing into the X line along the separatrix. The observations indicate that the electron acceleration region is widely larger than the predicted electron diffusion region in the classical Hall magnetic reconnection model. © 2013 American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879913201&doi=10.1002%2fgrl.50537&partnerID=40&md5=9f002dc1852b99b9615acbc79f932f91
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6179
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作者单位: Key Laboratory of Ionospheric Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 10029, China

Recommended Citation:
Wang R.,Du A.,Nakamura R.,et al. Observation of multiple sub-cavities adjacent to single separatrix[J]. Geophysical Research Letters,2013-01-01,40(11).
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