DOI: 10.1002/2014GL062710
论文题名: Analytical approximation of transit time scattering due to magnetosonic waves
作者: Bortnik J. ; Thorne R.M. ; Ni B. ; Li J.
刊名: Geophysical Research Letters
ISSN: 0094-8932
EISSN: 1944-8663
出版年: 2015
卷: 42, 期: 5 起始页码: 1318
结束页码: 1325
语种: 英语
英文关键词: magnetosonic waves
; nonresonant scattering
; radiation belts
; space plasmas
; transit time scattering
; wave-particle interactions
Scopus关键词: Diffusion
; Kinetic theory
; Particle interactions
; Radiation belts
; Wave plasma interactions
; Magnetosonic waves
; Nonresonant
; Space plasmas
; Transit time
; Wave-particle interactions
; Radiation effects
; atmospheric electricity
; electron
; magnetosphere
; plasma
; radiation budget
; wave scattering
英文摘要: Recent test particle simulations have shown that energetic electrons traveling through fast magnetosonic (MS) wave packets can experience an effect which is specifically associated with the tight equatorial confinement of these waves, known as transit time scattering. However, such test particle simulations can be computationally cumbersome and offer limited insight into the dominant physical processes controlling the wave-particle interactions, that is, in determining the effects of the various wave parameters and equatorial confinement on the particle scattering. In this paper, we show that such nonresonant effects can be effectively captured with a straightforward analytical treatment that is made possible with a set of reasonable, simplifying assumptions. It is shown that the effect of the wave confinement, which is not captured by the standard quasi-linear theory approach, acts in such a way as to broaden the range of particle energies and pitch angles that can effectively resonate with the wave. The resulting diffusion coefficients can be readily incorporated into global diffusion models in order to test the effects of transit time scattering on the dynamical evolution of radiation belt fluxes. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925796412&doi=10.1002%2f2014GL062710&partnerID=40&md5=d06e5e30c0b3a2a1a6b0ef9fb041490d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8548
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 Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States
Recommended Citation:
Bortnik J.,Thorne R.M.,Ni B.,et al. Analytical approximation of transit time scattering due to magnetosonic waves[J]. Geophysical Research Letters,2015-01-01,42(5).