| DOI: | 10.1002/2015GL065390
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| 论文题名: | Slow electron holes in multicomponent plasmas |
| 作者: | Norgren C.; André M.; Graham D.B.; Khotyaintsev Y.V.; Vaivads A.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9532
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| EISSN: | 1944-9263
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| 出版年: | 2015
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| 卷: | 42, 期:18 | | 起始页码: | 7264
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| 结束页码: | 7272
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| 语种: | 英语
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| 英文关键词: | Ion-electron instability
; Modified Buneman instability
; Multi-component plasma
; Slow electron holes
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| Scopus关键词: | Electron beams
; Electrons
; Magnetoplasma
; Phase space methods
; Plasma stability
; Solitons
; Stability
; Thermionic emission
; Buneman instability
; Electron beam instability
; Electron instability
; Electrostatic solitary waves
; Magnetic reconnections
; Marginal instabilities
; Multicomponents
; Slow electrons
; Plasma diagnostics
; electron
; instability
; magnetic field
; magnetopause
; nonlinearity
; numerical model
; parameterization
; plasma
; solitary wave
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| 英文摘要: | Electrostatic solitary waves (ESWs), often interpreted as electron phase space holes, are commonly observed in plasmas and are manifestations of strongly nonlinear processes. Often slow ESWs are observed, suggesting generation by the Buneman instability. The instability criteria, however, are generally not satisfied. We show how slow electron holes can be generated by a modified Buneman instability in a plasma that includes a slow electron beam on top of a warm thermal electron background. This lowers the required current for marginal instability and allows for generation of slow electron holes for a wide range of beam parameters that covers expected plasma distributions in space, for example, in magnetic reconnection regions. At higher beam speeds, the electron-electron beam instability becomes dominant instead, producing faster electron holes. The range of phase speeds for this model is consistent with a statistical set of observations at the magnetopause made by Cluster. © 2015 American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84945218399&doi=10.1002%2f2015GL065390&partnerID=40&md5=c293cdfbd6518165961d635997a623c2
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| Citation statistics: |
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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/9147
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| 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: | Swedish Institute of Space Physics, Uppsala, Sweden
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| Recommended Citation: | |
Norgren C.,André M.,Graham D.B.,et al. Slow electron holes in multicomponent plasmas[J]. Geophysical Research Letters,2015-01-01,42(18).
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