DOI: 10.1002/2014GL061927
论文题名: Observational evidence of electron pitch angle scattering driven by ECH waves
作者: Kurita S. ; Miyoshi Y. ; Cully C.M. ; Angelopoulos V. ; Contel O.L. ; Hikishima M. ; Misawa H.
刊名: Geophysical Research Letters
ISSN: 0094-9570
EISSN: 1944-9301
出版年: 2014
卷: 41, 期: 22 起始页码: 8076
结束页码: 8080
语种: 英语
英文关键词: diffuse aurora
; diffusion curve
; ECH wave
; pitch angle scattering
; whistler mode wave
Scopus关键词: Diffusion
; Distribution functions
; Electrons
; Magnetoplasma
; Plasma theory
; Chorus waves
; Cyclotron harmonics
; Diffuse aurora
; Electron pitch angle
; Pitch-angle scattering
; Wave-particle interactions
; Whistler-mode chorus
; Whistler-mode waves
; Atmospherics
; aurora
; data set
; diffusion
; electron
; observational method
; plasma
; velocity
英文摘要: Using the plasma wave and electron data obtained from Time History of Events and Macroscale Interactions during Substorms, we show a signature of electron pitch angle scattering driven by Electrostatic Cyclotron Harmonic (ECH) waves in the velocity distribution function (VDF). The diffusion curve of whistler mode waves is used as a proxy to identify changes in VDFs due to wave-particle interactions. We confirm that the shape of the VDF well agrees with the diffusion curve of whistler mode waves when whistler mode chorus alone is active. On the other hand, we find that the shape of the VDF deviates from the diffusion curves at low pitch angles when ECH waves are active following the inactivation of chorus waves. The result is observational support for electron pitch angle scattering caused by ECH waves and suggests that ECH waves can contribute to generation of diffuse auroras. © 2014. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923286205&doi=10.1002%2f2014GL061927&partnerID=40&md5=6e474671ee20b41a58a1c6df6468d60a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6834
Appears in Collections: 气候减缓与适应
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作者单位: Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Japan
Recommended Citation:
Kurita S.,Miyoshi Y.,Cully C.M.,et al. Observational evidence of electron pitch angle scattering driven by ECH waves[J]. Geophysical Research Letters,2014-01-01,41(22).