DOI: 10.1002/2014GL059725
论文题名: Peculiar pitch angle distribution of relativistic electrons in the inner radiation belt and slot region
作者: Zhao H. ; Li X. ; Blake J.B. ; Fennell J.F. ; Claudepierre S.G. ; Baker D.N. ; Jaynes A.N. ; Malaspina D.M. ; Kanekal S.G.
刊名: Geophysical Research Letters
ISSN: 0094-10170
EISSN: 1944-9901
出版年: 2014
卷: 41, 期: 7 起始页码: 2250
结束页码: 2257
语种: 英语
英文关键词: inner radiation belt
; pitch angle distribution
; plasmasphere
; radiation belt electrons
; slot region
; wave-particle interaction
Scopus关键词: Radiation belts
; Storms
; Inner radiation belts
; Pitch angle distribution
; Plasmasphere
; Radiation belt electrons
; slot region
; Wave-particle interactions
; Electrons
; atmospheric electricity
; electron
; heating
; magnetosphere
; storm
英文摘要: The relativistic electrons in the inner radiation belt have received little attention in the past due to sparse measurements and unforgiving contamination from the inner belt protons the high-quality measurements of the Magnetic Electron Ion Spectrometer instrument onboard Van Allen Probes provide a great opportunity to investigate the dynamics of relativistic electrons in the low L region. In this letter, we report the newly unveiled pitch angle distribution (PAD) of the energetic electrons with minima at 90° near the magnetic equator in the inner belt and slot region. Such a PAD is persistently present throughout the inner belt and appears in the slot region during storms. One hypothesis for 90° minimum PADs is that off 90° electrons are preferentially heated by chorus waves just outside the plasmapause (which can be at very low L during storms) and/or fast magnetosonic waves which exist both inside and outside the plasmasphere. Key Points Peculiar pitch angle distribution in the inner belt and slot region is reported Pitch angle distribution with minimum at 90° persists in inner belt Chorus/fast magnetosonic wave heating is suggested as a possible mechanism © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84897360181&doi=10.1002%2f2014GL059725&partnerID=40&md5=1f813d7f13d97d2afa6f1e88d3ccd378
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7434
Appears in Collections: 气候减缓与适应
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作者单位: Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States
Recommended Citation:
Zhao H.,Li X.,Blake J.B.,et al. Peculiar pitch angle distribution of relativistic electrons in the inner radiation belt and slot region[J]. Geophysical Research Letters,2014-01-01,41(7).