The Interactions of Energetic Particles with the Solar Wind - A Theoretical Study

高能粒子与太阳风的相互作用 - 理论研究

• 批准号: 8903703
• 负责人: Martin Lee
• 金额: $ 20.85万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-05-15 至 1992-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8903703&HistoricalAwards=false
• 关键词: Interactions; Energetic; Particles; Solar; Wind

This grant will fund theoretical studies of the interaction of energetic particles with the solar wind. The studies will be broad-based: they will emphasize shock-accelerated particles and pickup ions but will include galactic cosmic rays, solar flare particles and the cosmic comparisons between theory and observations, and the microprocesses of the interaction including wave excitation by the energetic particles and the quasilinear and nonlinear interaction between the waves and particles. Specific topics of research are, for example: (1) Shock-accelerated ion distributions at energies just above injection. (2) The mechanism which limits diffuse ion energy spectra at Earth's bow shock to exponential in energy per charge, and a search for the effects of curvature and gradient drifts on the spectra. (3) The acceleration of solar flare ions at coronal shocks including shock evolution and ion wave excitation. (4) Wave excitation in the solar wind by interstellar pickup hydrogen including wave coupling between outward and inward propagating waves. (5) Fundamental studies in the quasilinear evolution of pickup ions upstream of comets. (6) Galactic cosmic ray modulation in the outer heliosphere. The overall aim is to use energetic particles as probes of the electromagnetic environment of the earth and the sun.

这笔赠款将用于高能粒子与太阳风相互作用的理论研究。这些研究将是广泛的：它们将侧重于激波加速的粒子和拾取离子，但将包括星系宇宙射线、太阳耀斑粒子和理论与观测之间的宇宙比较，以及相互作用的微观过程，包括高能粒子激发的波，以及波和粒子之间的拟线性和非线性相互作用。具体的研究课题有：(1)能量略高于注入能量的激波加速离子分布。(2)将地球弓形激波的扩散离子能谱限制为单位电荷能量指数的机制，以及曲率和梯度漂移对光谱的影响的探索。(3)日冕激波对耀斑离子的加速作用，包括激波演化和离子波激发。(4)星际拾氢激发太阳风中的波，包括向外和向内传播的波之间的耦合。(5)彗星上游拾离子准线性演化的基础研究。(6)外日光层的星系宇宙线调制。总体目标是使用高能粒子作为地球和太阳电磁环境的探测器。