| DOI: | 10.1002/grl.50227
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| 论文题名: | Mapping HF waves in the reconnection diffusion region |
| 作者: | Viberg H.; Khotyaintsev Yu.V.; Vaivads A.; André M.; Pickett J.S.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9218
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| EISSN: | 1944-8949
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| 出版年: | 2013
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| 卷: | 40, 期:6 | | 起始页码: | 1032
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| 结束页码: | 1037
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| 语种: | 英语
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| 英文关键词: | Diffusion region
; Magnetic reconnection
; Plasma waves
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| Scopus关键词: | Counterstreaming electrons
; Diffusion region
; Electric field waveform
; Electron cyclotron waves
; Electron distributions
; Electrostatic solitary waves
; Magnetic reconnections
; Suprathermal electrons
; Electric fields
; Electron beams
; Electrons
; Magnetoplasma
; Plasma waves
; Space applications
; Diffusion
; cluster analysis
; diffusion
; electrical method
; electron
; frequency analysis
; Langmuir circulation
; mapping method
; timescale
; waveform analysis
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| 英文摘要: | We study in detail high-frequency (HF) plasma waves between the electron cyclotron and plasma frequencies within a reconnection diffusion region (DR) encountered by Cluster in the magnetotail using continuous electric field waveforms. We identify three wave types, all observed within the separatrix regions: Langmuir waves (LW), electrostatic solitary waves (ESWs), and electron cyclotron waves (ECWs). This is the first time the ECWs have been observed inside this region. Direct comparison between waveforms and electron distributions are made at the timescale of one energy sweep of the electron detector (125 ms). Based on the wave and electron distribution characteristics, we find that the separatrix region has a stratified spatial structure. The outer part of the region is dominated by LW emissions related to suprathermal electron beams propagating away from the X-line. Furthest in, nearest to the current sheet, we observe ESWs associated with counterstreaming electron populations. Studying HF waveforms allows for a precise mapping of kinetic boundaries in the reconnection region and helps to improve our understanding of the electron dynamics in the DR. Key Points High-frequency waves are observed exclusively in the separatrix regions High-frequency waveforms are simultaneously compared to electron distributions Electron cyclotron waves observed for the first time in the diffusion region. ©2013 American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876902846&doi=10.1002%2fgrl.50227&partnerID=40&md5=eafa7a2db5d5ddea5c5474db62963004
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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/6482
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Swedish Institute of Space Physics, Uppsala, Sweden
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| Recommended Citation: | |
Viberg H.,Khotyaintsev Yu.V.,Vaivads A.,et al. Mapping HF waves in the reconnection diffusion region[J]. Geophysical Research Letters,2013-01-01,40(6).
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