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Advanced Multifunctional MMOD Shield: Radiation Shielding Assessment

机译:先进的多功能MMOD屏蔽:辐射屏蔽评估

摘要

As NASA is looking to explore further into deep space, multifunctional materials are a necessity for decreasing complexity and mass. One area where multifunctional materials could be extremely beneficial is in the micrometeoroid orbital debris (MMOD) shield. A typical MMOD shield on the International Space Station (ISS) is a stuffed whipple shield consisting of multiple layers. One of those layers is the thermal blanket, or multi-layer insulation (MLI). Increasing the MMOD effectiveness of MLI blankets, while still preserving their thermal capabilities, could allow for a less massive MMOD shield. Thus, a study was conducted to evaluate a concept MLI blanket for an MMOD shield. In conjunction, this MLI blanket and the subsequent MMOD shield was also evaluated for its radiation shielding effectiveness towards protecting crew. The overall MMOD shielding system using the concept MLI blanket proved to only have a marginal increase in the radiation mitigating properties. Therefore, subsequent analysis was performed on various conceptual MMOD shields to determine the combination of materials that may prove superior for radiation mitigating purposes. The following paper outlines the evaluations performed and discusses the results and conclusions of this evaluation for radiation shielding effectiveness.
机译:随着NASA寻求进一步探索深空,多功能材料对于降低复杂性和质量是必不可少的。多功能材料可能极为有利的领域之一是微流星体轨道碎片(MMOD)防护罩。国际空间站(ISS)上典型的MMOD防护板是由多层填充的鞭状防护板。这些层之一是隔热层或多层绝缘(MLI)。提高MLI毯子的MMOD有效性,同时仍保留其散热能力,可能会减少MMOD防护罩的重量。因此,进行了一项研究以评估用于MMOD屏蔽的概念MLI毯。同时,还评估了该MLI毯和随后的MMOD防护罩的辐射防护效能,以保护船员。事实证明,使用MLI毯子概念的整个MMOD屏蔽系统在辐射缓和特性方面仅略有提高。因此,对各种概念上的MMOD屏蔽罩进行了后续分析,以确定可能证明对减轻辐射有优势的材料组合。下面的文章概述了执行的评估,并讨论了该评估的辐射屏蔽效果的结果和结论。

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