DOI: 10.1002/2015GL064379
论文题名: Resonance of relativistic electrons with electromagnetic ion cyclotron waves
作者: Denton R.E. ; Jordanova V.K. ; Bortnik J.
刊名: Geophysical Research Letters
ISSN: 0094-9134
EISSN: 1944-8865
出版年: 2015
卷: 42, 期: 20 起始页码: 8263
结束页码: 8270
语种: 英语
英文关键词: electromagnetic ion cyclotron waves
; plasmasphere
; relativistic electrons
; resonance condition
Scopus关键词: Cyclotrons
; Electron beams
; Electrons
; Ions
; Magnetosphere
; Plasma waves
; Resonance
; Ion cyclotron waves
; Plasmasphere
; Relativistic electron
; Resonance condition
; Resonance energies
; Resonant energy
; Thermal velocity
; Wave frequencies
; Cyclotron radiation
; electromagnetic field
; electromagnetic wave
; electron
; frequency analysis
; ion exchange
; plume
; resonance
英文摘要: Relativistic electrons have been thought to more easily resonate with electromagnetic ion cyclotron (EMIC) waves if the total density is large. We show that for a particular EMIC mode, this dependence is weak due to the dependence of the wave frequency and wave vector on the density. A significant increase in relativistic electron minimum resonant energy might occur for the H band EMIC mode only for small density, but no changes in parameters significantly decrease the minimum resonant energy from a nominal value. The minimum resonant energy depends most strongly on the thermal velocity associated with the field line motion of the hot ring current protons that drive the instability. High density due to a plasmasphere or plasmaspheric plume could possibly lead to lower minimum resonance energy by causing the He band EMIC mode to be dominant. We demonstrate these points using parameters from a ring current simulation. Key Points The minimum resonant energy depends strongly on the hot proton thermal speed For a particular mode, the minimum resonant energy depends only weakly on the total density High density could lower the minimum resonant energy by causing the He EMIC mode to be dominant © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946599628&doi=10.1002%2f2015GL064379&partnerID=40&md5=82720487620a355f6acf4128448bcddb
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8750
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: Department of Physics and Astronomy, Dartmouth College, Hanover, NH, United States
Recommended Citation:
Denton R.E.,Jordanova V.K.,Bortnik J.. Resonance of relativistic electrons with electromagnetic ion cyclotron waves[J]. Geophysical Research Letters,2015-01-01,42(20).