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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >The Radiation Belt Electron Scattering by Magnetosonic Wave: Dependence on Key Parameters
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The Radiation Belt Electron Scattering by Magnetosonic Wave: Dependence on Key Parameters

机译：辐射带电子散射磁声波:关键参数的依赖

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摘要

Magnetosonic (MS) waves have been found capable of creating radiation belt electron butterfly distributions in the inner magnetosphere. To investigate the physical nature of the interactions between radiation belt electrons and MS waves, and to explore a preferential condition for MS waves to scatter electrons efficiently, we performed a comprehensive parametric study of MS wave-electron interactions using test particle simulations. The diffusion coefficients simulated by varying the MS wave frequency show that the scattering effect of MS waves is frequency insensitive at low harmonics (f < 20 f_(cp)), which has great implications on modeling the electron scattering caused by MS waves with harmonic structures. The electron scattering caused by MS waves is very sensitive to wave normal angles, and MS waves with off 90° wave normal angles scatter electrons more efficiently. By simulating the diffusion coefficients and the electron phase space density evolution at different L shells under different plasma environment circumstances, we find that MS waves can readily produce electron butterfly distributions in the inner part of the plasmasphere where the ratio of electron plasma-to-gyrofrequency (f_(pe)/f_(ce)) is large, while they may essentially form a two-peak distribution outside the plasmapause and in the inner radiation belt where f_(pe)/f_(ce) is small.
机译：Magnetosonic (MS)波被发现的能力创建电子辐射带蝴蝶分布在磁层内部。调查的物理性质辐射带电子和之间的相互作用波,女士和探索一个优惠条件对于女士波有效散射电子,我们进行一个全面的参数研究wave-electron使用测试粒子的相互作用模拟。通过改变女士波频率显示散射波女士是频率的影响以低谐波不敏感(f < 20 f (cp)),这对建模有很大影响吗电子散射引起的波女士谐波结构。对波引起的波女士非常敏感正常的角度,用90°波和波女士正常的角散射电子更有效率。通过模拟扩散系数和电子相空间密度进化不同的L壳在不同的等离子体环境的情况下,我们发现女士波很容易产生电子蝴蝶分布在内心的一部分等离子体层电子的比例plasma-to-gyrofrequency (f (pe) / f (ce))很大,虽然他们可能本质上形成two-peak分布在等离子体层顶和外内部辐射带,f (pe) / f (ce)是小。

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