Particle Acceleration by Magnetic Reconnection in Impulsive and Gradual Solar Flares

脉冲和渐变太阳耀斑中磁重联的粒子加速

• 批准号: 0136718
• 负责人: Yuri Litvinenko
• 金额: $ 27.21万
• 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: 2002
• 资助国家: 美国
• 起止时间: 2002-04-01 至 2006-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0136718&HistoricalAwards=false
• 关键词: Particle; Acceleration; Magnetic; Reconnection; Impulsive

The investigators will determine the energy distribution of test particles accelerated in various magnetic field reconnection geometries. This will be achieved by integrating the particle equations of motion in specified analytic and numerical solutions of the magnetohydrodynamic equations. From these detailed computations, scaling laws for solar energetic particle (SEP) events will be derived, and subsequently compared with observations from the High Energy Solar Spectroscopic Imager (HESSI) satellite. The major goal of this effort is to develop a testable model capable of explaining how and why different reconnection configurations produce different acceleration regimes, ranging from prompt electron acceleration to gamma-ray energies to proton acceleration to GeV energies in large gradual flares. This work promises to provide critical new insight on to SEP events, which are a prominent component of Space Weather.

研究人员将确定在各种磁场重联几何形状中加速的测试粒子的能量分布。这将通过将粒子运动方程整合到磁流体动力学方程的特定解析解和数值解中来实现。从这些详细的计算，太阳高能粒子（SEP）事件的标度律将被导出，并随后与高能太阳光谱成像仪（HESSI）卫星的观测结果进行比较。这项工作的主要目标是开发一个可测试的模型，能够解释如何以及为什么不同的重联配置产生不同的加速制度，从即时电子加速到伽马射线能量质子加速到GeV能量的大型渐进耀斑。这项工作有望为SEP事件提供重要的新见解，SEP事件是空间天气的重要组成部分。