DOI: 10.1002/2016GL068467
论文题名: Nonlinear Landau resonant scattering of near equatorially mirroring radiation belt electrons by oblique EMIC waves
作者: Wang B. ; Su Z. ; Zhang Y. ; Shi S. ; Wang G.
刊名: Geophysical Research Letters
ISSN: 0094-9102
EISSN: 1944-8833
出版年: 2016
卷: 43, 期: 8 起始页码: 3628
结束页码: 3636
语种: 英语
英文关键词: electron loss
; EMIC waves
; Landau trapping
; radiation belt
; test particle simulation
; wave-particle interaction
Scopus关键词: Cyclotrons
; Kinetic theory
; Plasma density
; Radiation belts
; Electron loss
; Landau trapping
; Physical mechanism
; Radiation belt electrons
; Resonant scattering
; Test particles
; Wave-particle interactions
; Wide energy range
; Electrons
; electromagnetic wave
; electron
; equatorial wave
; plasma
; radiation budget
; resonance
; solar wind
; wave field
; wave property
; wave scattering
英文摘要: In response to solar wind disturbances, radiation belt (a few hundreds of keV to several MeV) electron fluxes can be depleted significantly over the entire equatorial pitch angle range. The frequently mentioned cyclotron resonant scattering is applicable only for electrons mirroring off the equator. Here we propose a new physical mechanism, nonlinear Landau resonance with oblique electromagnetic ion cyclotron (EMIC) waves, to effectively scatter the near equatorially mirroring electrons. Our test particle simulations show that the nonlinear Landau trapping can occur over a wide energy range and yield the net decrease in equatorial pitch angle Δαeq≈10° within several seconds. Our parametric studies further reveal that this nonlinear Landau-trapping process is favored by a low plasma density, an intense wave field, a high wave frequency close to ion gyrofrequencies, and a large wave normal angle. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84968885148&doi=10.1002%2f2016GL068467&partnerID=40&md5=438ab473256f65357dd8f2baa966d331
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10065
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Beijing Institute of Tracing and Telecommunications Technology, Beijing, China
Recommended Citation:
Wang B.,Su Z.,Zhang Y.,et al. Nonlinear Landau resonant scattering of near equatorially mirroring radiation belt electrons by oblique EMIC waves[J]. Geophysical Research Letters,2016-01-01,43(8).