Magnetospheric Density and Pressure in Equilibrium and Dynamic Models

该项目将利用从IMAGE航天器获取的等离子体波数据来开发一个电子密度数据库，该数据库是磁层中时间和位置的函数。然后，该数据库将用于创建地球等离子层的真实三维模型。等离子体层模型随后将使用磁流体动力学（MHD）模拟来模拟Pi2波事件。等离子层中的压力可能是各向异性的，这种情况不容易纳入MHD模拟。因此，该项目将使用混合代码模拟（离子的完全动力学、粒子模拟和电子的流体近似）来研究各向异性压力演化和与磁场平行流动的热流。该项目的最后一步是制定一个全球MHD规范，该规范可以以自一致的方式纳入各向异性压力的影响。

This project will utilize data taken from the plasma wave data from the IMAGE spacecraft to develop a database of electron density as a function of time and position in the magnetosphere. That database will then be used to create realistic 3-D models of the Earth's plasmasphere. The plasmasphere model will then be used to simulate Pi2 wave events using Magnetohydrodynamic (MHD) simulations. The pressure in the plasmasphere can be anisotropic, a condition that cannot be easily incorporated into MHD simulations. The project will therefore use hybrid code simulations (fully kinetic, particle simulations of the ions and a fluid approximation for the electrons) to investigate the anisotropic pressure evolution and the heat flux that flows parallel to the magnetic field. The final step in the project is to develop a global MHD code that can incorporate the effects of anisotropic pressure in a self-consistent manner.