Theoretical Studies of Magnetohydrodynamic Wave and ParticleDynamics in Magnetospheric Plasmas

磁层等离子体中磁流体动力波和粒子动力学的理论研究

• 批准号: 9710067
• 负责人: Liu Chen
• 金额: $ 4万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-12-15 至 1999-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9710067&HistoricalAwards=false
• 关键词: Theoretical; Studies; Magnetohydrodynamic; Wave; ParticleDynamics

This project is a continuation of work which investigates the wave and particle dynamical properties associated with ULF magnetic waves in the Earth's magnetospheric and magnetopause plasmas. Objectives of the proposed work are to (1) develop a gyrokinetic- MHD hybrid code to simulate excitations of ULF waves by energetic ring current protons; and (2) perform extensive simulations using realistic magnetic field geometries and plasma parameters to develop new theoretical insights and unerstandings on the ULF wave and instability properties; (3) derive quasilinear equations due to ULF/MHD waves including effects associated with realistic magnetic field geometries, plasma equilibria, and finite ion Larmor radii; and (4) investigate the implications of quasilinear diffusion on instability saturations and wave-induced transport on the dayside magnetopause.

该项目是研究地球磁层和磁层顶等离子体中与超低频磁波有关的波和粒子动力学性质的工作的继续。 本文的主要工作是：（1）开发一个回旋运动-磁流体混合程序，模拟高能环电流质子对超低频波的激发;（2）利用真实的磁场几何形状和等离子体参数进行广泛的模拟，以发展对超低频波和不稳定性的新的理论认识;（3）导出由ULF/MHD波引起的准线性方程，包括与实际磁场几何形状、等离子体平衡和有限离子拉莫尔半径有关的影响;（4）研究了准线性扩散对向阳面磁层顶不稳定饱和度和波致输运的影响。