GEM: Cusp Particle Energization from Waves

GEM：来自波的尖点粒子能量

• 批准号: 0802715
• 负责人: Simon Wing
• 金额: $ 30万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-10-01 至 2013-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0802715&HistoricalAwards=false
• 关键词: GEM; Cusp; Particle; Energization; Waves

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.

该项目将为PI的磁鞘离子和电子进入尖点磁层的模型增加重要的新功能。 改进后的模型将具有更真实的磁场和电场参数。 它还将利用最近的磁流体动力学（MHD）模拟磁鞘，以更准确地表征鞘。 第三个主要的改进将是纳入波粒相互作用，导致粒子的相互作用。 该项目将利用来自国防气象卫星方案（DMSP）卫星和极地卫星（美国航天局国际日地方案使命）的数据。 模型改进完成后，将结合卫星数据使用该模型研究与尖点有关的两个重要课题。 第一个主题是了解限制尖点空间大小的过程，包括纬度和经度。 第二个主题是确定波粒相互作用在多大程度上加热粒子并改变其分布，该项目与关于尖点物理学的地球空间环境建模重点小组有关。 这些结果预计也会对其他空间物理领域产生影响，在这些领域，波对粒子的散射被认为是重要的。