Estimation of bounce resonant scattering by fast magnetosonic waves
Estimation of bounce resonant scattering by fast magnetosonic waves
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DOI：
10.1002/2015gl066796
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发表时间：
2016-02
影响因子：
5.2
通讯作者：
Y. Shprits
中科院分区：
文献类型：
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作者：
Y. Shprits
在本研究中，我们提出了用快速磁声波计算近赤道镜像电子的弹跳共振散射。我们首先探讨了散射率和估计时间尺度对计算中包含的不同数量的共振的敏感性。然后探讨计算速率对假定的波法向角的敏感性。我们的研究结果表明，在大径向距离下，根据波的假设性质，反射共振散射能够在短至几小时甚至几天的时间尺度上提供近等距镜像电子的局部各向同性。我们还分析了电子和质子在不同能量和径向距离下的弹跳频率，并讨论了能够与这些粒子发生弹跳共振的波模式。特别讨论了弹跳共振作为辐射带修复的潜在机制的重要性。
In this study we present calculation of bounce resonant scattering of near equatorially mirroring electrons by fast magnetosonic waves. We first explore the sensitivity of the scattering rates and estimated time scales to a different number of resonances included into calculations. We then explore the sensitivity of calculated rates to the assumed wave normal angle. Our results show that at large radial distances bounce resonant scattering is capable of providing local isotropization of nearly equatorially mirroring electrons on the time scales as short as hours or even days depending on the assumed properties of waves. We also present analysis of the bounce frequencies of electrons and protons at various energies and radial distances and discuss the wave modes that are capable of bounce resonance with these particles. In particular, the importance of bounce resonance as a potential mechanism for the radiation belt remediation is discussed.