Collaborative Research: GEM: Modulation of Plasma Waves by Thermal Plasma Density Variation in the Inner Magnetosphere

地球空间环境模拟方案是一个基础广泛、由社区发起的关于地球磁层物理以及磁层与大气和太阳风的耦合的研究方案。GEM的工作是通过一系列活动和焦点小组完成的，这些活动和重点小组解决具体问题，从而建立具有预测能力的全球地球空间环流模式(GGCM)。该项目将有助于实现这一目标，即了解近地空间环境中等离子体波在激发和传输粒子和等离子体方面的作用。此外，该项目还支持一名职业生涯早期跟踪教员的研究，并有助于对另一名职业生涯早期女科学家和一名研究生的研究培训。这项研究利用THEMIS和Van Allen探测器的航天器观测和HOTRAY波射线跟踪计算机程序来研究内磁层热等离子体密度变化对等离子体波强度的调制。要解决的具体科学问题包括：(1)热等离子体密度变化如何引起合唱、嘶嘶和磁声波强度的调制？(2)由这些密度变化所激发的波如何影响辐射带和环电流？这项调查与GEM的“风暴时间内磁层-电离层对流”和“科学磁测图与技术”专题小组有关。

The Geospace Environment Modeling (GEM) Program is a broad-based, community-initiated research program on the physics of the Earth's magnetosphere and the coupling of the magnetosphere to the atmosphere and to the solar wind. The work of GEM is accomplished in a series of campaigns and focus groups that solve specific problems leading to the construction of a global Geospace General Circulation Model (GGCM) with predictive capability. This project will contribute essential results to this goal pertaining to understanding the role of plasma waves in energizing and transporting particles and plasma in the near-Earth space environment. In addition, the project supports the research of an early-career tenure-track faculty member and contributes to the research training of another early-career female scientist and a graduate student.This investigation utilizes both spacecraft observations from THEMIS and Van Allen Probes and the HOTRAY wave ray-tracing computer code to study the modulation of plasma wave intensity by thermal plasma density variations in the inner magnetosphere. The specific science questions to be addressed include: (1) How do thermal plasma density variations cause modulation in the intensity of chorus, hiss and magnetosonic waves? and (2) How do the waves excited by these density variations affect radiation belt and ring current? The investigation is relevant to the GEM Focus Groups on "Storm-Time Inner Magnetosphere-Ionosphere Convection", and "Scientific Magnetic Mapping & Techniques".