Chorus waves are intense electromagnetic emissions critical in modulating electron dynamics. In this study, we perform two-dimensional particle-in-cell simulations to investigate self-consistent wave-particle interactions with oblique chorus waves. We first analyze the electron dynamics sampled from cyclotron and Landau resonances with waves, and then quantify the advection and diffusion coefficients through statistical studies. It is found that phase-trapped cyclotron resonant electrons satisfy the second-order resonance condition and gain energy from waves. While phase-bunched cyclotron resonant electrons cannot remain in resonance for long periods. They transfer energy to waves and are scattered to smaller pitch angles. Landau resonant electrons are primarily energized by waves. For both types of resonances, advection coefficients are greater than diffusion coefficients when the wave amplitude is large. Our study highlights the important role of advection in electron dynamics modulation resulting from nonlinear wave-particle interactions.

中文翻译：

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斜合唱波自洽波粒相互作用中与平流和扩散相关的电子动力学


合唱波是强烈的电磁发射，对于调节电子动力学至关重要。在这项研究中，我们进行了二维细胞内粒子模拟，以研究斜合唱波的自洽波粒相互作用。我们首先分析从回旋加速器和朗道共振波中采样的电子动力学，然后通过统计研究量化平流和扩散系数。研究发现，相俘回旋共振电子满足二阶共振条件，可以从波中获取能量。而相聚回旋加速器共振电子不能长时间保持共振。它们将能量传递为波并分散到较小的桨距角。朗道共振电子主要由波激发。对于这两种类型的共振，当波幅较大时，平流系数大于扩散系数。我们的研究强调了平流在非线性波粒相互作用产生的电子动力学调制中的重要作用。