Energetic Particles at the Termination of the Solar Wind via Energetic Neutral Atoms

太阳风终止时的高能粒子通过高能中性原子

• 批准号: 9727080
• 负责人: Ke Chiang Hsieh
• 金额: $ 8.86万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-03-15 至 2000-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9727080&HistoricalAwards=false
• 关键词: Energetic; Particles; Termination; Solar; Wind

This project completes an alternative route to information on the distribution of interstellar cosmic rays, complementing efforts of the only existing approach. The existing method involves solar modulation and shock acceleration of energetic charged particles at/interior to the solar wind termination shock, while the new approach utilizes the energetic neutral atoms (ENAs) produced from interacting charged particles and local interstellar medium exterior to the termination shock. The investigators are: (1) compiling relevant cross sections for ENA production and extinction, and all characterizing parameters of the solar wind and interstellar gas; (2) coding a three-dimensional computer program simulating ENA flux at any vantage point, and under any heliospheric and interstellar conditions, and (3) developing an iterative process for optimizing the parameters characterizing the spatial and energy distribution of cosmic rays at the termination shock. The research takes a huge step forward in searching for the origins of cosmic rays, as well as propagation of charged particles in and out of the solar wind influence.

该项目完成了获取星际宇宙射线分布信息的替代途径，补充了现有唯一途径的努力。 现有的方法涉及太阳调制和冲击加速的高能带电粒子在/内部的太阳风终止冲击，而新的方法利用高能中性原子（ENA）产生的相互作用带电粒子和本地星际介质外部的终止冲击。 研究者是：（1）编制ENA产生和消亡的相关截面，以及太阳风和星际气体的所有特征参数;（2）编写三维计算机程序，模拟在任何Vantage位置、任何日光层和星际条件下的ENA通量，以及（3）开发迭代过程，用于优化表征终止激波处宇宙射线的空间和能量分布的参数。 这项研究在寻找宇宙射线的起源以及带电粒子在太阳风影响下的传播方面迈出了一大步。