Collaborative Research: GEM--An Integrated Study of Fast Magnetosonic Waves in the Radiation Belts

合作研究：GEM--辐射带中快磁声波的综合研究

• 批准号: 1303675
• 负责人: Michelle Thomsen
• 金额: $ 5.99万
• 依托单位: Planetary Science Institute
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1303675&HistoricalAwards=false
• 关键词: Collaborative; Research; GEM; Integrated; Study

The source of energetic electrons in the radiation belts during magnetic storms has long been and remains an unsolved problem in magnetospheric physics. In the most common model electrons are first accelerated in the near-Earth plasma sheet and these accelerated particles provide a ?seed? population for the radiation belts. Under this model the seed electrons undergo further acceleration in the radiation belts. Recently some studies have questioned whether or not this seed population is necessary. In this view the electrons are locally accelerated in the radiation belts. This proposal will investigate whether or not a seed population is necessary. The investigators will examine the phase space density of electrons as a function of radial distance by using observations from the THEMIS satellites, the Van Allen Probes, SWARM (an ESA mission) and e-POP (a Canadian mission). This will be a statistical study that uses a number of events.The PI has long involved secondary school students in his research. His research projects for high school students have been very successful. He will continue this under this grant. The research findings from this proposal are important for space weather applications.

磁暴期间辐射带中高能电子的来源一直是磁层物理学中尚未解决的问题。在最常见的模型中，电子首先在近地等离子体层中加速，这些加速的粒子提供了“种子”。辐射带的人口。在这个模型下，种子电子在辐射带中进一步加速。最近一些研究质疑这种种子种群是否必要。在这个观点中，电子在辐射带中被局部加速。该提案将调查种子群体是否必要。研究人员将利用THEMIS卫星、范艾伦探测器、SWARM（欧空局任务）和e-POP（加拿大任务）的观测结果，检查电子的相空间密度作为径向距离的函数。这将是一个使用许多事件的统计研究。长期以来，PI一直让中学生参与他的研究。他对高中生的研究项目非常成功。他将在这笔拨款下继续这项工作。该提案的研究成果对空间天气应用具有重要意义。