Global Dynamics of Storm-Time Ring Current: Analysis of Energetic Neutral Atom Observations

研究人员将利用高能中性原子（ENA）的观测来研究环电流的动力学。他们将对1995年10月29日的地磁风暴进行个案研究，以确定中性原子的相对贡献、环电流离子的电荷交换损失率、风暴期间离子的能谱变化以及ENA与磁指数Dst之间的关系。他们还将对Geotail卫星观测到的ENA事件进行统计研究。统计研究将确定磁暴过程中ENA组成的趋势。Geotail和Polar卫星之间的ENA观测结果将进行比较，以比较空间中两个位置的ENA总强度。这项研究将有助于发展ENA技术作为内磁层结构的诊断工具。

The investigators will use observations of energetic neutral atoms (ENA) to study the dynamics of the ring current. They will perform a case study of the October 29, 1995, geomagnetic storm to determine the relative contributions of neutral atoms, the charge-exchange loss-rate of ring current ions, the energy spectral variations of ions during the storm, and the relationship between ENA and the magnetic index Dst. They will also conduct a statistical study of ENA events observed by the Geotail satellite. The statistical study will identify trends in the composition of ENA during the course of a magnetic storm. Comparison of ENA observations between the Geotail and Polar satellites will be made to compare the total ENA intensity at two locations in space. The study will help develop the ENA technique as a diagnostic tool for the structure of the inner magnetosphere.