GEM: Plasma Sheet Preconditioning Affecting the Dynamics of the Inner Magnetosphere

GEM：影响内磁层动力学的等离子体片预处理

• 批准号: 1303579
• 负责人: Joachim Raeder
• 金额: $ 36.13万
• 依托单位: University of New Hampshire
• 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 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1303579&HistoricalAwards=false
• 关键词: GEM; Plasma; Sheet; Preconditioning; Affecting

The goal of this project is to understand how preconditioning of the magnetotail during periods of northward interplanetary magnetic field (IMF) or high solar wind velocity affects the inner magnetosphere. During northward IMF a cold dense plasma sheet forms which when the IMF subsequently turns southward flows into the inner magnetosphere. It appears as super-dense plasma at synchronous orbit and then becomes accelerated and contributes to the ring current. While it is generally accepted that this process occurs the parameters that control it, how the energization takes place and the effects are not well understood. This study will use the OpenGGCM global MHD simulation coupled with two ring current models (the Rice Convection Model (RCM) and the Comprehensive Ring Current Model (CRCM)). Model results will be analyzed to understand the process. This project will support a graduate student.

该项目的目标是了解在向北行星际磁场（IMF）或高太阳风速度期间磁尾的预处理如何影响内磁层。 在 IMF 向北流动期间，形成冷致密等离子体片，当 IMF 随后向南流动时，该等离子体片流入内磁层。它在同步轨道上表现为超密等离子体，然后加速并产生环电流。虽然人们普遍认为这个过程的发生是由控制它的参数决定的，但通电是如何发生的以及产生的影响尚不清楚。本研究将使用 OpenGGCM 全局 MHD 模拟以及两个环电流模型（莱斯对流模型 (RCM) 和综合环电流模型 (CRCM)）。 将分析模型结果以了解该过程。该项目将支持一名研究生。