GEM: Understanding the Global Aspects of Plasma Heating in Earth's Magnetosphere

该项目将研究各种传输模式（稳定对流和突发体流/双极化锋）如何影响内磁层和环电流。来自忒弥斯的等离子体片和范艾伦探测器的夜侧辐射带的观测将用于确定不同的传输模式如何影响环电流的局部特性。在不同形式的相互作用下，将研究能谱、俯仰角分布和压力的演变。一个目标将是确定绝热和非绝热加速度的相对重要性。这项研究将涉及多个事件。在独立但相关的研究中，IMAGE HENA观测结果将用于确定全球不断变化的环电流和等离子体片压力。这将通过比较H和O离子在对流和亚风暴期间的光谱和空间演变来完成。最后，利用Rice对流模型在时间演化场中的三维粒子轨迹跟踪代码来计算非绝热加速机制。HENA观测结果将用于确定同步轨道上的等离子体压力，这些将用作RCM的输入。RCM产生的压力将与环电流区域的全球压力进行比较。这项研究将支持一名博士后研究员，并为一名女性科学家提供早期职业发展。

This project will investigate how various modes of transport (steady convection and bursty bulk flows/dipolarization fronts) influence the inner magnetosphere and ring current. Observations in the plasma sheet from THEMIS and in the night side radiation belts from the Van Allen Probes will be used to determine how various transport modes affect local properties of the ring current. The evolution of energy spectra, pitch angle distributions and pressure will be examined for the different forms of interaction. One goal will be to determine the relative importance of adiabatic and non-adiabatic acceleration. This study will involve multiple events. In separate but related studies IMAGE HENA observations will be used to determine globally evolving ring current and plasma sheet pressures. This will be done by comparing the spectral and spatial evolution of H and O ions during convection and substorms. Finally a 3D particle trajectory tracing code will be used in the time evolving fields from the Rice Convection Model to evaluate non-adiabatic acceleration mechanisms. HENA observations will be used to determine plasma pressures at synchronous orbit and these will be used as input to the RCM. The resulting pressures from RCM will be compared with the global pressures in the ring current region.This research will support a post-doctoral researcher and provide early career development for a female scientist.