We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Effect of chorus normal angle on dynamic evolution of radiation belt energetic electrons.
- Authors
Zhang, Lewei; He, Yihua; Liu, Si; Yang, Chang; Zhou, Qinghua; Xiao, Fuliang
- Abstract
Gyroresonance between chorus waves and radiation belt electrons is usually evaluated by using the Gaussian wave normal angle ( X=tan θ) distribution. In this study, we examine the influence of peak wave normal angle ( X=tan θ) on chorus-electron interaction in the heart of radiation belts L=4.5. By varying X=0,2,4,6, we calculate the bounce-averaged diffusion coefficients, and then simulate the phase space density (PSD) evolution of radiation belt energetic electrons induced by both dayside and nightside chorus waves. Numerical simulations show that diffusion coefficients move to the low pitch angle region and drop rapidly by a factor of ∼10 as X increases by 2 each time, consequently leading to the smaller amplitude and narrower pitch angle region in electron PSD evolution. The current results demonstrate that chorus-electron interaction in the outer radiation belt is largely dependent on peak wave normal angles.
- Subjects
RADIATION belts; ELECTRON-electron interactions; PHASE space; DIFFUSION coefficients; NUMERICAL analysis
- Publication
Astrophysics & Space Science, 2014, Vol 354, Issue 2, p401
- ISSN
0004-640X
- Publication type
Article
- DOI
10.1007/s10509-014-2125-2