Combined Effects of ElectroMagnetic Ion Cyclotron (EMIC) and Whistler Mode Waves on Relativistic Electron Scattering in the Earth's Inner Magnetosphere

地球内部磁层的动态，特别是外辐射带，受波粒相互作用的影响很大。在这些相互作用中，某些电磁波模式可以将电子加速到相对论能量，而另一些模式则负责将相对论电子沉淀到大气中。这项工作将研究这一过程，这对于预测空间天气对航天器的影响非常重要。该奖项的主要目的是研究联合电磁离子回旋加速器(EMIC)和哨声波对地球内部磁层电子动力学的影响。该方法涉及利用Van Allen探测器对EMIC和哨声波的统计观测、亚暴飞行任务期间事件和大尺度相互作用的时间历史以及磁层多尺度任务航天器，以建立新的EMIC和哨声波观测经验模型，并从分析和数字上量化所产生的电子散射率。基于估计的散射率的模拟结果将通过与观察到的电子通量的演变进行比较来验证。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

The dynamics of the Earth’s inner magnetosphere, and particularly the outer radiation belts, are highly affected by wave-particle interactions. In these interactions, certain electromagnetic wave modes can accelerate electrons up to relativistic energies, while other are responsible for relativistic electron precipitation into the atmosphere. The work will investigate this process, which is important for predicting space weather effects on space craft. Early career researchers and students will be supported.The primary objective of this award is to investigate conjoint electronmagnetic ion cyclotron (EMIC) and whistler wave effects on electron dynamics in the Earth's inner magnetosphere. The methodology involves the use of statistical observations of EMIC and whistler waves from the Van Allen Probes, the Time History of Events and Macroscale Interactions during Substorms mission, and Magnetospheric Multiscale Mission spacecraft to construct a new empirical model of EMIC and whistler wave observations and quantify, analytically and numerically, the resultant electron scattering rates. Simulation results, based on the estimated scattering rates, will be validated by comparing with the observed evolution of electron fluxes.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.