Understanding the Properties of Chorus Waves in the Earth’s Inner-magnetosphere and Their Effects on Van Allen Radiation Belt Electrons

地球的辐射带由高能电子组成，这对绕地球轨道运行的卫星和太空中的宇航员可能是危险的。这些高能电子在外辐射带中的通量是非常动态的。了解控制辐射带中高能电子动力学的物理过程对于保护卫星和太空中的宇航员非常重要。和声和辐射带电子之间的波粒相互作用被认为在这些粒子的加速和损失中起着至关重要的作用。在这个项目中，将利用来自多颗卫星的最先进的测量结果，开发全面的合唱波模型。然后，将计算扩散系数，以量化重要的波-粒子相互作用过程及其后果。在我们复杂的辐射带动力学模型的帮助下，地球辐射带中的和声波引起的高能电子的基本加速和损失将被量化。我们将验证模拟结果与卫星测量结果，以了解合唱波造成的加速和损失之间的竞争。所有这些改进对于回答一个首要的科学问题将是至关重要的：为什么地球的辐射带对强度大致相同的地磁风暴反应不同，以及是什么决定了合唱波引起的加速和损失过程之间竞争的结果？我们辐射带动力学模型的改进将提供对地球辐射带更准确的预测。

Earth’s radiation belts consist of highly energetic electrons, which can be hazardous to Earth-orbiting satellites and astronauts in space. The fluxes of these energetic electrons in the outer radiation belt are very dynamic. Understanding the physical processes that control the dynamics of energetic electrons in the radiation belts is important for the protection of satellites and astronauts in space. Wave-particle interactions between chorus waves and radiation belt electrons are believed to play a crucial role in the acceleration and loss of these particles. In this project, utilizing state-of-the-art measurements from multiple satellites, comprehensive chorus wave models will be developed. Afterward, diffusion coefficients will be calculated to quantify the important wave-particle interaction processes and their consequences. With the help of our sophisticated radiation belt dynamic model, fundamental acceleration and loss of energetic electrons caused by chorus waves in the Earth's radiation belts will be quantified. We will validate simulation results against satellite measurements to understand the competition between acceleration and loss caused by chorus waves. All these improvements will be critically important for answering the overarching scientific question: Why do the Earth’s radiation belts respond differently to geomagnetic storms which have approximately the same intensity and what determines the outcome of the competition between the acceleration and loss processes caused by chorus waves? Improvements in our radiation belt dynamics model will provide more accurate forecasting of the Earth’s radiation belts.