Kinetic Theories of Ultra-Low Frequency and Current-Sheet Instabilities in Magnetospheric Plasmas

该项目将研究地球磁层中高能离子产生的超低频率（ULF）电磁振荡。该项目将利用陀螺动力学模拟。这涉及到几个任务。首先是开发一个陀螺-动力学-磁流体动力学模拟程序。该代码将使在现实的等离子体结构中研究超短波波的内部激励成为可能。模拟的结果将用于发展波浪及其稳定特性的分析理论。该项目将研究高能离子与由偶极子样磁场线的曲率产生的波的耦合，纵波模式和镜像波模式之间的耦合，以及波与alfv<s:1>气球模式的耦合。模拟和理论结果将与卫星测量的极低频波进行比较。这项研究的结果不仅会增强我们对地球磁层的理解，还会对我们对实验室实验的理解产生影响。大部分研究将由一名研究生进行。

This project will examine ultra-low frequency (ULF) electromagnetic oscillations that are generated by energetic ions in Earth's magnetosphere. The project will utilize gyrokinetic simulations. There are several tasks involved. The first is to develop a gyro-kinetic-magnetohydrodynamic simulation code. The code will make it possible to study the internal excitations of ULF waves in a realistic plasma configuration. The results from the simulations will then be used to develop analytical theories of the waves and their stability properties. The project will examine the couplings of the energetic ions to the waves that result from the curvature of dipole-like magnetic field lines, the coupling between compressional wave modes and mirror wave modes, and the coupling of the waves to Alfvén balloon modes. The simulation and theory results will be compared with satellite measurements of ULF waves. The results of the research will have applications beyond enhancing our understanding of Earth's magnetosphere, as they will have impacts on our understanding of laboratory experiments as well. Much of the research will be carried out by a graduate student.