SGER: Excitation Mechanism of Internally Excited Magnetic Pulsations

本项目利用低频不稳定性的动力学- mhd理论和粒子和波的卫星数据分析来了解磁层内激超低频磁脉动的激发机制。这些研究将为利用在磁层观测到的极低频磁脉动卫星粒子数据计算新的稳定性参数提供重要的理论基础和技术。横波的不稳定可能是由于释放自由能与氧离子速度、空间尾碰撞分布或通过波粒共振产生的压力梯度有关。初步的研究结果揭示了极低频波的许多新的和重要的物理特征以及相关的等离子体性质。

The proposed project deals with kinetic-MHD theory of low frequency instabilities and satellite data analysis of particle and wave to understand the excitation mechanisms of internally excited ultra low frequency (ULF) magnetic pulsations observed in the magnetosphere. The studies will provide important theoretical basis and techniques for computing new stability parameters from satellite particle data associated with ULF magnetic pulsations observed in the magnetosphere. Transverse waves are probably driven unstable by releasing free energy associated with oxygen ion velocity space bump-on-tail distribution or its pressure gradient via wave-particle resonances. Preliminary research results have revealed many new and important features of the physics of ULF waves and the related plasma properties.