Acceleration of He and Heavy Ions in Impulsive Solar Flares

小行星9224688 该项目通过模拟电磁离子回旋波对日冕中粒子加速的影响来研究脉冲太阳耀斑中3He和重离子加速的理论。 在这个理论中，电磁氢回旋波传播到一个更大的磁场中，在那里它们与质子之后具有下一个最大荷质比的粒子（即3He）共振。 PI将预测这些离子的能谱和丰度，以便通过未来的测量对理论的有效性进行严格的测试。 PI将通过在相空间中跟随测试粒子来模拟离子的加速，并且我们将通过使用由随机平面波的叠加组成的宽带波谱来对波进行建模，所述随机平面波的电场和磁场通过适当的色散关系而相关。 该项目将模拟分布函数，以便与从闭合磁耀斑环中高能粒子的伽马射线观测中推导出的分布函数进行比较。 他们将研究在电子束存在下典型耀斑等离子体参数的这些波的增长和阻尼，以确定与波一致的耀斑等离子体参数。 ***

9224688 Mozer This project examines the theory of 3He and heavy ion acceleration in impulsive solar flares by modeling the effect of electromagnetic ion cyclotron waves on the acceleration of particles in the solar corona. In this theory, electromagnetic hydrogen cyclotron waves propagate into a larger magnetic field where they become resonant with particles have the next largest charge to mass ration after protons, namely 3He. The PI will predict the energy spectra and abundances of these ions in order to expose the theory to a rigorous test of its validity by future measurements. The PI will simulate the acceleration of ions by following test particles in phase space and we will model the waves by using a broadband wave spectrum composed of a superposition of random plane waves whose electric and magnetic fields are related by the appropriate dispersion relation. The project will model the distribution functions for comparison with those deduced from gamma-ray observations of energetic particles in closed magnetic flare loops. They will study the growth and damping of these waves for typical flare plasma parameters in the presence of an electron beam in order to determine the parameters of flare plasmas which are consistent with the waves. ***