Runaway Electrons and Nonlinear Ion Acceleration in Impulsive Solar Flares

脉冲太阳耀斑中的失控电子和非线性离子加速

• 批准号: 9415379
• 负责人: James Miller
• 金额: $ 13.59万
• 依托单位: University of Alabama in Huntsville
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-02-15 至 1998-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9415379&HistoricalAwards=false
• 关键词: Runaway; Electrons; Nonlinear; Ion; Acceleration

This project will formulate a comprehensive and self-consistent theory of electron and ion acceleration in impulsive solar flares, and specifically to account for the near simultaneous acceleration of electrons and ions as manifested by the approximately coincident observed time profiles of X-ray and nucleation de-excitation line emission. The PIs will investigate in detail the evolution of an initially Maxwellian electron distribution in response to an applied DC electric field, taking into account wave generation and the resulting feedback of the waves on the electrons. They will also investigate the parametric decay of these waves into lower hybrid sidebands and low-frequency electrostatic waves. Theoretical results will be compared with observations of solar flares whenever possible to guide subsequent work and progressively constrain model parameters. This research aims to explain near simultaneous acceleration of electrons and ions, as well as the high electron/proton ratio in impulsive solar flares.

该项目将制定一个全面的和自洽的理论，在脉冲太阳耀斑的电子和离子加速，特别是占电子和离子的几乎同时加速所表现出的X射线和成核去激发线发射的时间分布的近似一致的观察。 PI将详细研究初始麦克斯韦电子分布响应于施加的直流电场的演变，同时考虑到波的产生和由此产生的波对电子的反馈。 他们还将研究这些波的参数衰减到较低的混合边带和低频静电波。 将尽可能将理论结果与太阳耀斑观测结果进行比较，以指导后续工作并逐步限制模型参数。 这项研究旨在解释电子和离子几乎同时加速，以及脉冲太阳耀斑中的高电子/质子比。