Theoretical bounce resonance diffusion coefficient for waves generated near the equatorial plane

Theoretical bounce resonance diffusion coefficient for waves generated near the equatorial plane
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赤道面附近产生的波的理论弹跳共振扩散系数

DOI:
10.1002/2016gl070139
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发表时间:
2016-07
影响因子:
5.2
通讯作者:
Li X.
Li X.
中科院分区:
地球科学1区
文献类型:
--
作者:
Tao X.;Li X.

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本文导出了赤道面附近任意波法向角分布波的理论反弹共振扩散系数。以前的研究要么假设波覆盖整个反弹轨迹或只有一个波的正常角度为一个给定的频率。在这项工作中,我们从理论上推导出一个新的反弹共振扩散系数没有这些限制。我们证明了反弹共振的俯仰角扩散对于使用已发表的磁声波模型的近赤道镜像粒子是重要的。我们的研究结果表明,磁声波的反弹共振扩散可能是近赤道镜像粒子俯仰角散射的重要机制;因此,在全球辐射带建模中包括磁声波的反弹共振可能很重要。
Theoretical bounce resonance diffusion coefficient for waves generated near the equatorial plane with arbitrary wave normal angle distributions is derived. Previous studies either assumed waves to cover the whole bounce trajectory or to have only one wave normal angle for a given frequency. In this work, we theoretically derive a new bounce resonance diffusion coefficient without these limitations. We demonstrate that the pitch angle diffusion from bounce resonance is significant for near‐equatorially mirroring particles using a published magnetosonic wave model. Our results suggest that the bounce resonance diffusion by magnetosonic waves could be an important mechanism for pitch angle scattering of near‐equatorially mirroring particles; therefore, it might be important to include bounce resonance with magnetosonic waves in global radiation belt modeling.
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