DOI: 10.1029/2018JA025341
Scopus记录号: 2-s2.0-85052488354
论文题名: Production of Negative Hydrogen Ions Within the MMS Fast Plasma Investigation Due to Solar Wind Bombardment
作者: Gingell I. ; Schwartz S.J. ; Gershman D.J. ; Paterson W.R. ; Desai R.T. ; Giles B.L. ; Pollock C.J. ; Avanov L.A.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 8 起始页码: 6161
结束页码: 6170
语种: 英语
英文关键词: charge exchange
; instruments
; MMS
; negative ions
; solar wind
英文摘要: The particle data delivered by the Fast Plasma Investigation instrument aboard National Aeronautics and Space Administration's Magnetospheric Multiscale (MMS) mission allow for exceptionally high-resolution examination of the electron and ion phase space in the near-Earth plasma environment. It is necessary to identify populations which originate from instrumental effects. Using Fast Plasma Investigation's Dual Electron Spectrometers, we isolate a high-energy (approximately kiloelectron volt) beam, present while the spacecraft are in the solar wind, which exhibits an azimuthal drift with period associated with the spacecraft spin. We show that this population is consistent with negative hydrogen ions H− generated by a double charge exchange interaction between the incident solar wind H+ ions and the metallic surfaces within the instrument. This interaction is likely to occur at the deflector plates close to the instrument aperture. The H− density is shown to be approximately 0.2–0.4% of the solar wind ion density, and the energy of the negative ion population is shown to be 70% of the incident solar wind energy. These negative ions may introduce errors in electron velocity moments on the order of 0.2–0.4% of the solar wind velocity and significantly higher errors in the electron temperature. ©2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113402
Appears in Collections: 气候减缓与适应
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作者单位: The Blackett Laboratory, Imperial College London, London, United Kingdom; Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States; Goddard Space Flight Center, NASA, Greenbelt, MD, United States
Recommended Citation:
Gingell I.,Schwartz S.J.,Gershman D.J.,et al. Production of Negative Hydrogen Ions Within the MMS Fast Plasma Investigation Due to Solar Wind Bombardment[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(8)