DOI: 10.1002/2016GL068689
论文题名: Observations of energetic particle escape at the magnetopause: Early results from the MMS Energetic Ion Spectrometer (EIS)
作者: Cohen I.J. ; Mauk B.H. ; Anderson B.J. ; Westlake J.H. ; Sibeck D.G. ; Giles B.L. ; Pollock C.J. ; Turner D.L. ; Fennell J.F. ; Blake J.B. ; Clemmons J.H. ; Jaynes A.N. ; Baker D.N. ; Craft J.V. ; Spence H.E. ; Niehof J.T. ; Reeves G.D. ; Torbert R.B. ; Russell C.T. ; Strangeway R.J. ; Magnes W. ; Trattner K.J. ; Fuselier S.A. ; Burch J.L.
刊名: Geophysical Research Letters
ISSN: 0094-9539
EISSN: 1944-9270
出版年: 2016
卷: 43, 期: 12 起始页码: 5960
结束页码: 5968
语种: 英语
英文关键词: energetic particle escape
; magnetic reconnection
; magnetopause
; magnetosheath
; MMS
Scopus关键词: Magnetic fields
; Magnetism
; Magnetopause
; Energetic electron
; Energetic ion
; Energetic particles
; Magnetic reconnections
; Magnetosheaths
; Magnetospheric multiscale missions
; Multiple species
; Pitch angle distribution
; Magnetosphere
; electron
; energetics
; magnetic field
; magnetopause
; magnetosphere
; observational method
; plasma
; spectrometer
英文摘要: Energetic (greater than tens of keV) magnetospheric particle escape into the magnetosheath occurs commonly, irrespective of conditions that engender reconnection and boundary-normal magnetic fields. A signature observed by the Magnetospheric Multiscale (MMS) mission, simultaneous monohemispheric streaming of multiple species (electrons, H+, Hen+), is reported here as unexpectedly common in the dayside, dusk quadrant of the magnetosheath even though that region is thought to be drift-shadowed from energetic electrons. This signature is sometimes part of a pitch angle distribution evolving from symmetric in the magnetosphere, to asymmetric approaching the magnetopause, to monohemispheric streaming in the magnetosheath. While monohemispheric streaming in the magnetosheath may be possible without a boundary-normal magnetic field, the additional pitch angle depletion, particularly of electrons, on the magnetospheric side requires one. Observations of this signature in the dayside dusk sector imply that the static picture of magnetospheric drift-shadowing is inappropriate for energetic particle dynamics in the outer magnetosphere. ©2016. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84977074166&doi=10.1002%2f2016GL068689&partnerID=40&md5=58eaa2fc89e1c2591dfe5987aa61654e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10502
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: The Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States
Recommended Citation:
Cohen I.J.,Mauk B.H.,Anderson B.J.,et al. Observations of energetic particle escape at the magnetopause: Early results from the MMS Energetic Ion Spectrometer (EIS)[J]. Geophysical Research Letters,2016-01-01,43(12).