SGER: Excitation Mechanism of Internally Excited Magnetic Pulsations

拟议的项目涉及低频不稳定性的动力学-磁流体理论以及对粒子和波的卫星数据分析，以了解在磁层中观察到的内部激发的超低频(ULF)磁脉动的激发机制。这些研究将为从与磁层观测到的超低频磁脉动有关的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。横波可能是通过波粒共振释放与氧离子速度空间碰尾分布或其压力梯度相关的自由能来驱动不稳定的。初步的研究结果揭示了超低频物理和相关等离子体性质的许多新的和重要的特征。

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.