Acceleration Processes in the Solar Wind

建立了一个新的离子与发散太阳风等离子体中阿尔芬波相互作用的共振回旋加速器理论模型。它基于波粒相互作用的特征尺度（微观尺度）和非均匀性尺度（宏观尺度）之间的尺度分离。后者比前者大五到六个数量级。这项研究的首要目标是解释最近对太阳风的观测，这些观测揭示了(1)粒子的体积速度大大超过质子的速度，(2)离子的微分运动沿着磁场排列，(3)微分速度遵循当地的阿尔芬速度。

A new theoretical model of resonant cyclotron interaction of ions with Alfven waves in the divergent solar wind plasma will be constructed. It is based on a scale separation between the characteristic scales of wave-particle interaction (microscopic scale) and the scales of nonhomogeneity (macroscopic scale). The latter is five to six orders of magnitude larger than the former. The overarching goal of the study is to explain recent observations of the solar wind which have revealed that (1) the bulk speed of the particles considerably exceeds that of the protons, (2) the differential motion of the ions is aligned along the magnetic field, and (3) the differential speed follows the local Alfven speed.