Theoretical Studies of Solar Wind-Magnetosphere-Ionosphere Coupling on Intermediate Scales

这笔赠款将用于支持一项中等规模的研究 太阳风、磁层和电离层的耦合 分析和数值技术的结合。 耦合对 这些尺度是重要和有趣的，主要是由于 非理想MHD过程对动力学的重要性。 授出 将涉及三个领域：非线性效应，压缩 效应和动力学效应。 非线性变得相当 在小规模电流的动力学中， 与通量转移事件有关。 一个模型来描述 磁流体压缩波和横向波之间的耦合 广义几何将被开发，并用于研究 耦合对场对准的产生的影响 电流和微脉动 单粒子效应和 集体等离子体动力学将通过试验研究 粒子和自洽等离子体模拟，这些研究 将被用来改善纳入这些影响的MHD 模型 最终的目标将是整合这些影响 极光通量管的整体MHD模型， 了解极光本身。

This grant will support a study of the intermediate scale coupling of the solar wind, magnetosphere and ionosphere by a combination of analytic and numerical techniques. Coupling on these scales is important and interesting, primarily due to the importance of non-ideal MHD processes on the dynamics. The grant will address three areas: nonlinear effects, compressional effects and kinetic effects. Nonlinearities become quite important in the dynamics of small scale currents such as those associated with flux transfer events. A model to describe the coupling between compressional and transverse MHD waves in a generalized geometry will be developed, and used to study the effect coupling may have on the generation of field-aligned currents and micropulsations. The effects of single particle and collective plasma dynamics will be investigated by means of test particle and self-consistent plasma simulation, and these studies will be used to improve the inclusion of these effects on MHD models. The final goal will be an integration of these effects into an overall MHD model of auroral flux tubes and an understanding of the aurora itself.