Acceleration Processes in the Solar Wind

太阳风的加速过程

• 批准号: 0210155
• 负责人: Valentin Shevchenko
• 金额: $ 20.35万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-15 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0210155&HistoricalAwards=false
• 关键词: Acceleration; Processes; Solar; Wind

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.

将构建发散太阳风等离子体中离子与阿尔文波的共振回旋相互作用的新理论模型。 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结果，这些观测结果表明：(1) 粒子的整体速度大大超过质子的速度，(2) 离子的差动运动沿着磁场排列，(3) 差动速度遵循局部阿尔文速度。