DOI: 10.1002/2016GL070216
论文题名: Propagation and linear mode conversion of magnetosonic and electromagnetic ion cyclotron waves in the radiation belts
作者: Horne R.B. ; Miyoshi Y.
刊名: Geophysical Research Letters
ISSN: 0094-8560
EISSN: 1944-8291
出版年: 2016
卷: 43, 期: 19 起始页码: 10034
结束页码: 10039
语种: 英语
英文关键词: EMIC waves
; magnetosonic waves
; mode conversion
Scopus关键词: Cyclotrons
; Electron beams
; Ions
; Radiation belts
; Ray tracing
; Cross-over frequencies
; Electron acceleration
; Ion cyclotron waves
; Ion distributions
; Linear mode conversion
; Magnetosonic waves
; Mode conversions
; Wave frequencies
; Cyclotron radiation
英文摘要: Magnetosonic waves and electromagnetic ion cyclotron (EMIC) waves are important for electron acceleration and loss from the radiation belts. It is generally understood that these waves are generated by unstable ion distributions that form during geomagnetically disturbed times. Here we show that magnetosonic waves could be a source of EMIC waves as a result of propagation and a process of linear mode conversion. The converse is also possible. We present ray tracing to show how magnetosonic (EMIC) waves launched with large (small) wave normal angles can reach a location where the wave normal angle is zero and the wave frequency equals the so-called crossover frequency whereupon energy can be converted from one mode to another without attenuation. While EMIC waves could be a source of magnetosonic waves below the crossover frequency, magnetosonic waves could be a source of hydrogen band waves but not helium band waves. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84992458927&doi=10.1002%2f2016GL070216&partnerID=40&md5=39a3055d784058bc54ced7125c910149
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9523
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: British Antarctic Survey, Cambridge, United Kingdom
Recommended Citation:
Horne R.B.,Miyoshi Y.. Propagation and linear mode conversion of magnetosonic and electromagnetic ion cyclotron waves in the radiation belts[J]. Geophysical Research Letters,2016-01-01,43(19).