Theoretical Studies on Wave and Particle Dynamics of Hydromagnetic Alfven Waves in the Earth's Magnetosphere

这项资助将集中在扩展以前的理论 磁流体Alfven波的动力学性质研究 地球的磁层 一种短波长回旋动力学 形式主义将被用来研究1）波激发 各向异性，高β磁层等离子体中的机制， 2)相应的粒子通量振荡，包括 关键的有限拉莫尔半径效应 （1）和（2）的结果 然后将与观测数据进行比较，以提供一些 波浪自由能源的明确答案， 生成机制。 此外，费尔德线路资源在 磁层等离子体，包括有限的等离子体压力， 场线资源对波激励的影响将是 研究了 因此，理论结果应提供 重要的新物理见解和定量预测 关于地球磁层中的地磁脉动。

This grant will focus on extending previous theoretical studies on dynamical properties of hydromagnetic Alfven waves in the Earth's magnetosphere. A short wavelength gyrokinetic formalism will be employed to study 1) the wave excitation mechanism in anisotropic, high-beta magnetospherice plasmas, and 2) the corresponding particle flux oscillation including the crucial finite Larmor-radius effects. Results from (1) and (2) will then be compared with observational data to provide some definitive answers to the wave free energy source(s) and generation mechanism(s). In addition, feld line resources in magnetospheric plasmas including finite plasma pressure and effects of field line resources on wave excitations will be studied. The theoretical results should therefore provide significant new physical insight and quantitative predications about geomagnetic pulsations in the Earth's magnetosphere.***