| DOI: | 10.1002/2013GL058769
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| 论文题名: | Chorus waves and spacecraft potential fluctuations: Evidence for wave-enhanced photoelectron escape |
| 作者: | Malaspina D.M.; Ergun R.E.; Sturner A.; Wygant J.R.; Bonnell J.W.; Breneman A.; Kersten K.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-10454
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| EISSN: | 1944-10185
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| 出版年: | 2014
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| 卷: | 41, 期:2 | | 起始页码: | 236
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| 结束页码: | 243
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| 语种: | 英语
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| 英文关键词: | chorus waves
; density fluctuations
; radiation belts
; spacecraft potential
; terrestrial magnetosphere
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| Scopus关键词: | Electric fields
; Electromagnetic field effects
; Photoelectrons
; Photons
; Plasma density
; Probes
; Radiation belts
; Spacecraft
; Chorus waves
; Density fluctuation
; Earth's radiation belts
; Electron energization
; Plasma density fluctuations
; Potential fluctuations
; Terrestrial magnetosphere
; Wave electric fields
; Electromagnetic waves
; correlation
; electric field
; magnetic field
; plasma
; radiative transfer
; spacecraft
; wave action
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| 英文摘要: | Chorus waves are important for electron energization and loss in Earth's radiation belts and inner magnetosphere. Because the amplitude and spatial distribution of chorus waves can be strongly influenced by plasma density fluctuations and spacecraft floating potential can be a diagnostic of plasma density, the relationship between measured potential and chorus waves is examined using Van Allen Probes data. While measured potential and chorus wave electric fields correlate strongly, potential fluctuation properties are found not to be consistent with plasma density fluctuations on the timescales of individual chorus wave packets. Instead, potential fluctuations are consistent with enhanced photoelectron escape driven by chorus wave electric fields. Enhanced photoelectron escape may result in potential fluctuations of the spacecraft body, the electric field probes, or both, depending on the ambient plasma and magnetic field environment. These results differ significantly from prior interpretations of the correspondence between measured potential and wave electric fields. ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84892648524&doi=10.1002%2f2013GL058769&partnerID=40&md5=daf7938e1f0e052baa073e986edde225
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7718
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| 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
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| Recommended Citation: | |
Malaspina D.M.,Ergun R.E.,Sturner A.,et al. Chorus waves and spacecraft potential fluctuations: Evidence for wave-enhanced photoelectron escape[J]. Geophysical Research Letters,2014-01-01,41(2).
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