| DOI: | 10.1002/2013GL058507
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| 论文题名: | Observations of kinetic scale field line resonances |
| 作者: | Chaston C.C.; Bonnell J.W.; Wygant J.R.; Mozer F.; Bale S.D.; Kersten K.; Breneman A.W.; Kletzing C.A.; Kurth W.S.; Hospodarsky G.B.; Smith C.W.; Macdonald E.A.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-10428
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| EISSN: | 1944-10159
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| 出版年: | 2014
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| 卷: | 41, 期:2 | | 起始页码: | 209
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| 结束页码: | 215
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| 语种: | 英语
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| 英文关键词: | alfven waves
; field lines resonances
; injections
; kinetic effects
; particle accleration
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| Scopus关键词: | Electromagnetic fields
; Gyroscopes
; Injection (oil wells)
; Ions
; Kinetics
; Magnetic fields
; Magnetosphere
; Spectrum analysis
; Accleration
; Alfven waves
; Cross-spectral analysis
; Electric and magnetic fields
; Field line resonances
; Field lines
; Kinetic effect
; Multiple transitions
; Resonance
; acceleration
; demagnetization
; Doppler effect
; electromagnetic field
; kinetic energy
; magnetosphere
; resonance
; wave field
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| 英文摘要: | We identify electromagnetic field variations from the Van Allen Probes which have the properties of Doppler shifted kinetic scale Alfvénic field line resonances. These variations are observed during injections of energetic plasmas into the inner magnetosphere. These waves have scale sizes perpendicular to the magnetic field which are determined to be of the order of an ion gyro-radius (ρi) and less. Cross-spectral analysis of the electric and magnetic fields reveals phase transitions at frequencies correlated with enhancements and depressions in the ratio of the electric and magnetic fields. Modeling shows that these observations are consistent with the excitation of field-line resonances over a broad range of wave numbers perpendicular to the magnetic field (kτ) extending to k τρi ≫ 1. The amplitude of these waves is such that E/Bo ≳ Ωi/kτ (E, B o, and Ωi are the wave amplitude, background field strength, and ion gyro-frequency, respectively) leading to ion demagnetization and acceleration for multiple transitions through the wave potential. ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84892643350&doi=10.1002%2f2013GL058507&partnerID=40&md5=9bc4a22e1a16702e18ce89876cac4089
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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/7692
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Space Sciences Laboratory, University of California, Berkeley, CA, United States
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| Recommended Citation: | |
Chaston C.C.,Bonnell J.W.,Wygant J.R.,et al. Observations of kinetic scale field line resonances[J]. Geophysical Research Letters,2014-01-01,41(2).
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