在中国空间站进行生物暴露实验的太阳紫外线辐射
Binquan Zhang1,2,3, Guohong Shen1,2,3, Changsheng Tuo1
1National Space Science Center, Chinese Academy of Sciences, Beijing, China.
Astrobiology
|January 30, 2026
概括
中国空间站的新太阳紫外线探测器测量了太空辐射. 这种研究有助于理解生命.
科学领域:
- 太空科学和天体生物学
- 辐射生物学 辐射生物学
- 工具开发 工具开发
背景情况:
- 了解太空中对太阳紫外线 (UV) 辐射的生物反应对于天体生物学和长期太空居住至关重要.
- 之前的研究在太空暴露实验中缺乏精确的紫外线辐射测量.
- 恶劣的太空环境需要对生物样本进行准确的剂量测量.
研究的目的:
- 开发和部署太阳能紫外线探测器,用于测量中国空间站 (CSS) 的紫外线辐射.
- 量化生物样本在太空暴露实验期间所收到的紫外线剂量.
- 为了研究紫外线辐射变化和CSS轨道参数之间的关系.
主要方法:
- 使用三种碳化 (SiC) 光二极管开发太阳能紫外线探测器.
- 通过UVA,UVB和UVC波段测量太阳紫外线辐射.
- 使用光谱太阳辐射数据对探测器进行校准.
- 在CSS上部署太空放射生物暴露设施 (SREF).
主要成果:
- 在2023年6月至2024年9月期间,SREF完成了三次曝光任务,共计465天.
- 太阳紫外线探测器成功监测了紫外线辐射,揭示了与太阳β角和CSS轨道相关的周期变化.
- 累计的辐射剂量被记录为:391 MJ m-2 (UVA),78.6 MJ m-2 (UVB) 和30.1 MJ m-2 (UVC).
结论:
- 开发的太阳紫外线探测器为太空放射生物学实验提供了准确的紫外线剂量测量.
- 测量的紫外线辐射变化提供了对影响生物样本的太空环境因素的见解.
- 这些数据对于评估生命的起源/进化和制定太空保护战略至关重要.
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