Collaborative Research: Turbulence and Particle Acceleration in Solar Flares

合作研究：太阳耀斑中的湍流和粒子加速

• 批准号: 0312282
• 负责人: Alexandre Lazarian
• 金额: --
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-01 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0312282&HistoricalAwards=false
• 关键词: Collaborative; Research; Turbulence; Particle; Acceleration

The evolution of magnetohydrodynamic turbulence resulting from magnetic reconnection will be investigated, and subsequently employed to evaluate the transport and acceleration of energetic particles in solar flares. The cascade of turbulent energy from large to small scales and its dissipative damping through the heating and acceleration of particles determine the evolution of the plasma fluctuations. The transport coefficients for the electrons and protons follow from the coupling to the fluctuations, and enter into a Fokker-Planck equation describing the energy spectrum and pitch-angle distribution of the superthermal particles. Incorporation of these results into a coupled and self-consistent solar flare model will provide specific predictions that can be tested against ground, and space-based observations.

将研究磁重联引起的磁流体动力湍流的演化，并随后用于评估太阳耀斑中高能粒子的传输和加速。 湍流能量从大尺度到小尺度的级联及其通过粒子加热和加速的耗散阻尼决定了等离子体波动的演变。 电子和质子的输运系数从耦合到涨落，并进入描述超热粒子的能谱和俯仰角分布的福克-普朗克方程。 将这些结果纳入耦合且自洽的太阳耀斑模型将提供可以根据地面和天基观测进行测试的具体预测。