GEM: Cusp Particle Energization from Waves

该项目将为PI关于磁鞘离子和电子进入尖端磁层的模型增加重要的新特征。改进后的模型将具有更逼真的磁场和电场参数。它还将利用最近对磁鞘的磁流体动力学(MHD)模拟来更准确地表征磁鞘。第三个主要的改进将是结合波-粒子相互作用，导致粒子的能量。该项目将利用国防气象卫星计划(DMSP)卫星和极地卫星(NASA国际日地计划任务)的数据。在实施模型改进后，该模型将与卫星数据一起用于研究与尖点有关的两个重要问题。第一个主题是理解在纬度和经度上限制尖点空间大小的过程。第二个主题是确定波-粒子相互作用在多大程度上加热粒子并改变其分布。该项目与地球空间环境模拟(GEM)尖点物理焦点小组有关。预计这一结果还将对空间物理学的其他领域产生影响，在这些领域，波对粒子的能量被认为是重要的。

This project will add important new features to the PI's model for entry of magnetosheath ions and electrons into the magnetosphere in the cusp. The improved model will have more realistic magnetic and electric field parameters. It will also utilize recent magneto-hydrodynamics (MHD) simulations of the magnetosheath to more accurately characterize the sheath. The third major improvement will be to incorporate wave-particle interactions that result in energization of the particles. The project will utilize data from the Defense Meteorological Satellite Program (DMSP) satellites and the Polar satellite (NASA International Solar Terrestrial Program mission). After the model improvements have been implemented, the model will be used in conjunction with the satellite data to investigate two important topics concerning the cusp. The first topic is the understanding of the processes that limit the spatial size of the cusp, both in latitude and longitude. The second topic is to determine to what extent wave-particle interactions heat the particles and alter their distributions.The project is relevant to the Geospace Environment Modeling (GEM) Focus Group on cusp physics. The results are expected to also have impacts in other areas of space physics where particle energization by waves is thought to be important.