Magnetosonic (MS) waves are electromagnetic emissions from a few to 100 Hz primarily confined near the magnetic equator both inside and outside the plasmasphere. Previous studies proved that MS waves can transport equatorially mirroring electrons from an equatorial pitch angle of 90° down to lower values by bounce resonance. However, the dependence of the bounce resonance effect on wave or background plasma parameters is still unclear. Here, we applied a test particle simulation to investigate electron transport coefficients, including diffusion and advection coefficients in energy and pitch angle, due to bounce resonance with MS waves. We investigate five wave field parameters, including wave frequency width, wave center frequency, latitudinal distribution width, wave normal angle root-mean-square of wave magnetic amplitude, and two background parameters, L-shell value and plasma density. We find different transport coefficient peaks resulting from different bounce resonance harmonics. Higher-order harmonic resonances exist, but the effect of fundamental resonance is much stronger. As the wave center frequency increases, higher-order harmonics start to dominate. With wave frequency width increasing, the energy range of effective bounce resonance broadens, but the effect itself weakens. The bounce resonance effect will increase when we decrease the wave normal angle, or increase the wave amplitude, latitudinal distribution width, L-shell value, and plasma density. The parametric study will advance our understanding of the favorable conditions of bounce resonance.

中文翻译：

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高能电子和磁声波之间的弹跳共振：参数研究

磁声 (MS) 波是从几赫兹到 100 赫兹的电磁辐射，主要限制在等离子体层内外的磁赤道附近。先前的研究证明，MS波可以通过弹跳共振将赤道镜像电子从90°的赤道俯仰角传输到更低的值。然而，弹跳共振效应对波或背景等离子体参数的依赖性仍不清楚。在这里，我们应用测试粒子模拟来研究电子传输系数，包括由于与 MS 波的弹跳共振而产生的能量和俯仰角的扩散和平流系数。我们研究了五个波场参数，包括波频宽度、波中心频率、纬度分布宽度、波法向角波磁振幅均方根，以及两个背景参数，L壳值和等离子体密度。我们发现不同的弹跳共振谐波产生不同的传输系数峰值。存在高次谐波谐振，但基波谐振的影响要强得多。随着波中心频率的增加，高次谐波开始占主导地位。随着波频宽度的增加，有效弹跳共振的能量范围变宽，但效果本身减弱。当减小波法线角，或增大波幅、纬向分布宽度、L壳层值和等离子体密度时，反弹共振效应会增加。参数研究将增进我们对弹跳共振有利条件的理解。