论文标题
建模辐射屏蔽材料在火星上保护宇航员的有效性
Modeling the effectiveness of radiation shielding materials for astronaut protection on Mars
论文作者
论文摘要
与地球相比，火星的表面被太阳能和宇宙起源的充满活力的电荷颗粒轰炸。随着太空机构正在计划对红色星球进行乘员任务，主要问题是电离辐射对宇航员健康的影响。将暴露于可接受的辐射剂量水平以下对于机组人员的健康至关重要。在这项研究中，我们的目标是了解火星的辐射环境，并描述为保护宇航员免受宇宙辐射的有害影响而采用的主要策略。具体而言，在通过MSL Rad通过原位仪器测量验证其精度后，我们使用Geant4数值模型研究了火星辐射场中各种材料的屏蔽性能。我们的结果表明，诸如塑料，橡胶或合成纤维等复合材料对宇宙射线具有相似的响应，并且是最好的盾牌。火星雷果石具有中间行为，因此可以用作另一种实际选择。我们表明，使用其他低原子数材料结合使用，使用最广泛的铝可能会有所帮助。
The surface of Mars is bombarded by energetic charged particles of solar and cosmic origin with little shielding compared to Earth. As space agencies are planning for crewed missions to the red planet, a major concern is the impact of ionizing radiation on astronaut health. Keeping exposure below acceptable radiation dose levels is crucial for the health of the crew. In this study, our goal is to understand the radiation environment of Mars and describe the main strategies to be adopted to protect astronauts from the harmful impacts of cosmic radiation. Specifically, we investigate the shielding properties of various materials in the Martian radiation field using the Geant4 numerical model, after validating its accuracy with in-situ instrument measurements by MSL RAD. Our results indicate that composite materials such as types of plastic, rubber or synthetic fibers, have a similar response against cosmic rays and are the best shields. Martian regolith has an intermediate behavior and therefore could be used as an additional practical option. We show that the most widely used aluminum could be helpful when combined with other low atomic number materials.
