Interactions of Energetic Particles with the Solar Wind: A Theoretical Study

这笔更新经费将用于高能粒子与太阳风和日冕相互作用的理论研究。广泛的研究将包括星际吸收离子、银河宇宙射线、太阳高能粒子和冲击加速粒子。PI的目标是了解日球层的高能粒子结构和控制这种结构的基本过程。具体研究任务为：(1)建立基于俯仰角扩散方程的星际拾取离子输运理论，以预测大散射平均自由程下离子的空间分布和各向异性；(2)研究了层流和湍流准垂直激波的激波冲浪机制，作为彗星和行星际激波以及太阳风终止激波高能离子的起源；(3)研究地球准垂直弓形激波下游太阳风氦分布演化；(4)探索高能宇宙射线输运分析处理的结果；(5)建立了日冕环重连电流片中太阳高能电子和离子加速的解析理论

This renewal grant will conduct theoretical studies of the interactions of energetic particles with the solar wind and solar corona. Broad-based studies will include interstellar pickup ions, galactic cosmic rays, solar energetic particles, and shock-accelerated particles. The PI's goal is to understand the energetic particle structure of the heliosphere and fundamental processes that govern that structure. Specific research tasks are: (1) developing a transport theory for interstellar pickup ions based on the pitch-angle diffusion equation to predict the ion spatial distribution and anisotropy for large scattering mean free paths; (2) investigating the shock surfing mechanism at laminar and turbulent quasi-perpendicular shocks as the origin of energetic ions at cometary and interplanetary shocks and the solar wind termination shock; (3) studying the evolution of the solar wind helium distribution downstream of Earth's quasi-perpendicular bow shock; (4) exploring the consequences of an analytical treatment of cosmic ray transport at high energies; and (5) constructing an analytical theory of the acceleration of solar energetic electrons and ions in reconnecting current sheets in coronal loops for a realistic electromagnetic field configuration.***