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

合作研究：GEM：内磁层热等离子体密度变化对等离子体波的调制

• 批准号: 1723342
• 负责人: Wen Li
• 金额: $ 5.46万
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-01-01 至 2017-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1723342&HistoricalAwards=false
• 关键词: Collaborative; Research; GEM; Modulation; Plasma

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".

地球空间环境建模方案是一个基础广泛的社区发起的研究方案，研究地球磁层物理学以及磁层与大气层和太阳风的耦合。 全球地球观测系统的工作是通过一系列活动和重点小组来完成的，这些活动和小组解决了导致建立具有预测能力的全球地球空间大气环流模型的具体问题。该项目将为这一目标作出重要贡献，有助于了解等离子体波在激发和输送近地空间环境中的粒子和等离子体方面的作用。 此外，该项目还支持一名早期职业终身教职人员的研究，并为另一名早期职业女科学家和一名研究生的研究培训做出贡献，这项调查利用THEMIS和货车探测器的航天器观测和HOTRAY波射线追踪计算机代码，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，嘶嘶声和磁声波的强度调制？（2）这些密度变化激发的波如何影响辐射带和辐射环电流？这项调查与全球磁场监测系统关于“风暴时间内磁层-电离层对流”和“科学磁测绘技术”的重点小组有关。