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在阿尔特米斯I月球任务期间的太空辐射测量
Stuart P George1,2, Ramona Gaza3,4, Daniel Matthiä5
1Space Radiation Analysis Group, Johnson Space Center, Houston, TX, USA. stuart.george@nasa.gov.
Nature
|September 18, 2024
概括
在无人驾驶的"阿尔特米斯一号"任务中测量了辐射. 太空飞船提供了重要的屏蔽,减少太空辐射源的辐射剂量,
科学领域:
- 太空科学
- 辐射生物学
- 航空航天工程
背景情况:
- 太空辐射对长期任务中的宇航员构成重大健康风险,包括癌症和组织损伤.
- 现有的辐射数据有限,主要来自低地球轨道或机器人探测器,对行星间任务有重大警告.
- 了解辐射暴露对于在深空探索中确保船员安全至关重要.
研究的目的:
- 在无人驾驶"阿特米斯一号"月球任务期间,
- 评估猎户座对各种太空辐射源的保护效果.
- 为未来人类太空飞行任务的设计提供信息.
主要方法:
- 在高度屏蔽的猎户座航天器内测量了多个位置的辐射剂量.
- 在穿越范艾伦带和行星间空间时进行测量.
- 在航行过程中改变了航天器的方向,以评估其对辐射剂量的影响.
主要成果:
- 在光子带通过期间,在Orion的不同位置观察到剂量率的四倍变化.
- 星际宇宙射线剂量等效率高达60%低于之前的记录.
- 调整航天器的方向,在质子带过境过程中将辐射剂量降低了约50%.
结论:
- 太空船"猎户座"展现了未来人类探索任务的有效防御能力.
- 阿特米斯I号的辐射测量为减轻与太空旅行相关的风险提供了关键数据.
- 这些发现将为长期太空飞行设计辐射保护策略提供信息.
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