Runaway Electrons and Nonlinear Ion Acceleration in Impulsive Solar Flares

本项目将建立一个全面的、自一致的关于脉冲太阳耀斑中电子和离子加速的理论，特别是解释电子和离子几乎同时加速的现象，这表现在x射线和成核退激发线发射的近似重合的观测时间谱上。pi将详细研究初始麦克斯韦电子分布对施加的直流电场的响应的演变，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为较低的混合边带和低频静电波。理论结果将尽可能与太阳耀斑的观测结果进行比较，以指导后续工作并逐步约束模型参数。这项研究旨在解释电子和离子几乎同时加速，以及冲动性太阳耀斑中的高电子/质子比。

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.