AGS-PRF: A Study of the Onset of Explosive Magnetic Energy Release

AGS-PRF：爆炸磁能释放开始的研究

• 批准号: 1331356
• 负责人: Carrie Black
• 金额: $ 17.2万
• 依托单位: Black Carrie E
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1331356&HistoricalAwards=false
• 关键词: AGS; PRF; Study; Onset; Explosive

This is a 2-year postgraduate research fellowship project to investigate multi-scale processes that drive magnetic reconnection in magnetic configurations relevant to the solar corona and to the Earth's Magnetosphere. Results from global magnetohydrodynamic (MHD) simulations will be used as input to kinetic scale calculations of reconnection. The kinetic simulations will then be analyzed for feedback to the global evolution, in particular to address key issues such as energy partition and particle acceleration. Specifically, the Principal Investigator (PI) will analyze the evolution of extended current sheets from global simulations of Earth's Magnetotail and Coronal Mass Ejection (CME)/solar flare events. Drivers for kinetic simulations will be determined from the dynamics near the primary reconnection sites, and will then be implemented in a high performance Particle-in-Cell (PIC) code. From the kinetic simulations, the energy budgets and the particle distributions will be calculated. These will be (i) compared with magnetospheric and solar data, where possible, as a check of the validity of the kinetic model, and (ii) used for determining a "kinetic resistivity" model that can then be put back into global MHD simulations.This research project is perceived as an achievable intermediate step in understanding the multi-scale physical couplings in processes involving magnetic reconnection. It represents a pioneering, first-time investigation, in particular for solar events. As reconnection is a fundamental plasma physics phenomenon, the results of the effort will have broad impacts far beyond solar and magnetospheric physics. The PI is a recent PhD graduate and this research project will support the continued training and career advancement of an early-career female scientist in the Atmospheric and Geospace sciences

这是一个为期两年的研究生研究奖学金项目，目的是调查在与日冕和地球磁层相关的磁配置中驱动磁重联的多尺度过程。全球磁流体力学(MHD)模拟的结果将被用作重联动力学尺度计算的输入。然后将分析动力学模拟以获得对全球进化的反馈，特别是解决诸如能量分配和粒子加速等关键问题。具体来说，首席调查员(PI)将分析从全球模拟地球磁尾和日冕物质抛射(CME)/太阳耀斑事件中扩展的电流片的演变。动力学模拟的驱动程序将根据主要重联点附近的动力学确定，然后将在高性能粒子单元(PIC)代码中实现。根据动力学模拟，将计算能量平衡和粒子分布。这些数据将(I)与磁层和太阳数据进行比较，尽可能地检查动力学模型的有效性，以及(Ii)用于确定“动电阻率”模型，然后可以放回全球MHD模拟中。这项研究项目被认为是理解涉及磁重联过程中的多尺度物理耦合的一个可实现的中间步骤。它代表了一项开创性的首次调查，特别是对太阳活动的调查。由于重新连接是一种基本的等离子体物理现象，这一努力的结果将产生远远超出太阳和磁层物理的广泛影响。国际和平研究所是一名新近毕业的博士，该研究项目将支持大气和地球空间科学领域一名早期职业女性科学家的继续培训和职业发展。