Leidos Innovations Corporation, Houston, TX, USA.
Southwest Research Institute, Boulder, CO, USA.
Life Sci Space Res (Amst). 2019 Aug;22:89-97. doi: 10.1016/j.lssr.2019.07.010. Epub 2019 Jul 19.
We report the first long-term measurements of the radiation quality factor of energetic charged particles on the surface of Mars. The Radiation Assessment Detector (RAD) aboard the Mars Science Laboratory rover, also known as Curiosity, has been operating on Mars since 2012. RAD contains thin silicon detectors that record the ionization energy loss of energetic charged particles. The particles are dominantly galactic cosmic rays (GCRs) and the products of their interactions in the Martian atmosphere, with occasional contributions from solar energetic particles (SEPs). The quality factor on the surface of Mars is influenced by two factors: variations in the shielding provided by the atmosphere, and changes in the spectrum of the incident energetic particle flux due to the 11-year solar cycle. The two cannot be easily disentangled using the data alone, but insights can be gained from calculations and Monte Carlo simulations.
我们报告了首次在火星表面对高能带电粒子辐射品质因子的长期测量结果。辐射评估探测器（RAD）安装在火星科学实验室漫游者号上，也被称为好奇号，自 2012 年以来一直在火星上运行。RAD 包含薄的硅探测器，用于记录高能带电粒子的电离能量损失。这些粒子主要是银河宇宙射线（GCR）和它们在火星大气中相互作用的产物，偶尔也有太阳高能粒子（SEP）的贡献。火星表面的品质因子受两个因素的影响：大气提供的屏蔽变化，以及由于 11 年太阳周期，入射高能粒子通量的能谱变化。仅使用数据无法轻易区分这两个因素，但可以从计算和蒙特卡罗模拟中获得一些见解。
