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

这笔更新赠款将对高能粒子与太阳风和日冕的相互作用进行理论研究。 广泛的研究将包括星际拾取离子，银河宇宙射线，太阳高能粒子和冲击加速粒子。 PI的目标是了解日光层的高能粒子结构和控制该结构的基本过程。 具体的研究任务是：（1）发展了基于俯仰角扩散方程的星际拾取离子输运理论，预测了大散射平均自由程下离子的空间分布和各向异性：（2）研究了作为彗星激波、行星际激波和太阳风终端激波高能离子起源的层流和湍流准垂直激波的激波冲浪机制;（3）研究地球准垂直弓形激波下游太阳风氦分布的演化;（4）探索高能宇宙线输运分析处理的结果;以及（5）建立太阳高能电子和离子在日冕环中重连电流片的加速分析理论，真实的电磁场配置。*

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.***