A Three-Dimensional Global Hybrid Simulation Study of Magnetic Reconnection at the Dayside Magnetopause

白天磁层顶磁重联的三维全局混合模拟研究

• 批准号: 0852682
• 负责人: XUEYI WANG
• 金额: $ 21万
• 依托单位: Auburn University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0852682&HistoricalAwards=false
• 关键词: Three; Dimensional; Global; Hybrid; Simulation

Magnetic reconnection is a fundamental process that plays an important role in the transfer of the solar wind mass, momentum, and energy into Earth's magnetosphere. Fundamental issues on the micro- and mesoscale characteristics of reconnection in the magnetopause boundary layer are not adequately understood. This project will use a 3-D global hybrid plasma model to investigate magnetic reconnection at the magnetopause. The hybrid code treats electrons as a fluid, but includes full particle kinetics of ions. The code and is capable of resolving the plasma physics in a broad range from ion gyro-period to the dayside convection time scale, and from the ion Larmor radius to the global scale lengths. The primary tasks of this project are: (1) determination of the 3-D structure of magnetic reconnection at the dayside magnetopause, (2) determination of the magnetic field and plasma properties and evolution of flux transfer events (FTEs) in the magnetopause reconnection, (3) investigation of the corresponding ion dynamics and velocity distributions in reconnection events at various locations, and (4) investigation of the differences between reconnection that occurs when the magnetic fields are primarily anti-parallel and reconnection that occurs when there is a strong guide field (also know as component reconnection). The study will contribute to our understanding of 3-D, multi-scale physics of magnetic reconnection in the global magnetosphere and will improve our knowledge of the dynamical and structural properties of geospace. The 3-D hybrid modeling efforts will also have broader applications in other topics of magnetospheric, astrophysical, and laboratory plasma physics. The study will include a graduate student and it will also contribute to the National Science Foundation's goal of developing and maintaining cutting edge national computing and information infrastructure for research and education

磁重新连接是一个基本过程，在太阳风质量，动量和能量转移到地球磁层中起着重要作用。磁笼边界层重新连接的微观和中尺度特征的基本问题尚未充分理解。该项目将使用3-D全局杂交等离子体模型研究磁磁磁性的磁重新连接。混合代码将电子视为流体，但包括离子的完整粒子动力学。 该代码并且能够在从离子陀螺仪到时量到时代对流时间尺度以及从离子Larmor半径到全球尺度长度的广泛范围内解决等离子体物理学的范围。 该项目的主要任务是：（1）确定日期磁性时磁重新连接的3-D结构，（2）确定磁场和等离子体特性以及通量转移事件（FTES）在磁化通道重新连接中的磁通转移事件（FTES）的进化，（3）（3）对相应的离子动力学和速度分布的调查，在各个位置进行了调查，该位置在各个位置进行了对4.4当磁场主要是反平行的，并且在有强的导向场（也称为组件重新连接）时发生重新连接。这项研究将有助于我们理解全球磁层中磁重新连接的3-D多尺度物理，并将提高我们对地理的动力学和结构特性的了解。 3-D混合建模工作还将在磁层，天体物理和实验室血浆物理学的其他主题中更广泛地应用。该研究将包括一名研究生，它将为国家科学基金会的目标做出贡献，即开发和维持尖端的国家计算以及研究和教育的信息基础设施