Energetic Particles in the Inner Magnetosphere

该项目的目标是建立一个全面的内磁层模型，包括等离子层、环电流和辐射带的相互作用。该模型将是对综合环电流模型（CRCM）和辐射带环境模型（RBE）的改进。耦合模型将包括粒子加速过程、损失和输运过程，并将包括对电场和磁场的自洽描述。该项目将研究内部磁层如何动态响应太阳风驱动因素，以及内部过程如何调节对外部驱动因素的响应。将讨论的具体问题有：(1)电磁离子回旋波与粒子沉降导致环电流离子损失的关系；(2)径向输运、波粒相互作用和感应电场对地磁暴不同阶段辐射带相对论电子通量变化的作用；(3)内外辐射带缝隙区有时部分填充，有时完全填充的决定因素。了解太阳风驱动因素、环电流和辐射带之间的相互作用对我们理解空间天气有重要影响，包括对天基技术系统的辐射危害和对地面的地磁效应。

The goal of this project is to create a comprehensive model of the inner magnetosphere that includes the interactions of the plasmasphere, the ring current and the radiation belts. The model will be an enhancement of the Comprehensive Ring Current Model (CRCM) and the Radiation Belt Environment (RBE) model. The coupled model will include the processes by which particles are accelerated, the loss and transport processes and will include a self-consistent description of the electric and magnetic fields.The project will examine how the inner magnetosphere responds dynamically to the solar wind drivers and how the response to the external drivers is modulated by internal processes. Specific questions that will be addressed are: (1) what is the relationship between EMIC (electromagnetic ion-cyclotron)waves and the loss of ring current ions via particle precipitation, (2) what are the roles of radial transport, wave-particle interactions, and induced electric fields on the variations in relativistic electron fluxes in the radiation belt during different phases of geomagnetic storms, and (3) what determines the sometimes partial, sometimes complete filling of the slot region between the inner and outer radiation belts.Understanding the interactions between the solar wind drivers, the ring current and the radiation belts has important impacts on our understanding of space weather, including radiation hazards to space-based technological systems and geomagnetic effects on the ground.