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OSIRIS-REx Contamination Control Strategy and Implementation

机译:Osiris-rex污染控制策略和实施

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OSIRIS-REx will return pristine samples of carbonaceous asteroid Bennu. This article describes how pristine was defined based on expectations of Bennu and on a realistic understanding of what is achievable with a constrained schedule and budget, and how that definition flowed to requirements and implementation. To return a pristine sample, the OSIRIS-REx spacecraft sampling hardware was maintained at level 100 A/2 and <180 ng/cm~2 of amino acids and hydrazine on the sampler head through precision cleaning, control of materials, and vigilance. Contamination is further characterized via witness material exposed to the spacecraft assembly and testing environment as well as in space. This characterization provided knowledge of the expected background and will be used in conjunction with archived spacecraft components for comparison with the samples when they are delivered to Earth for analysis. Most of all, the cleanliness of the OSIRIS-REx spacecraft was achieved through communication among scientists, engineers, managers, and technicians.
机译:Osiris-rex将返回碳质小行星Bennu的原始样品。本文介绍了如何根据本国家的期望和对具有受限制的计划和预算的可实现的内容的逼真定义,以及如何如何流向要求和实施。为了返回原始样品,通过精确清洁,材料控制和警惕,将Osiris-Rex航天器采样硬件保持在100A / 2和<180ng / cm〜2的氨基酸和肼。通过暴露于航天器组件和测试环境以及空间的证人材料进一步表征污染。该表征提供了对预期背景的知识,并将与存档的航天器组件结合使用,以便与样品相比,当它们被传递到地球以进行分析时。最重要的是,奥西尔雷克斯航天器的清洁度通过科学家,工程师,经理和技术人员之间的沟通来实现。

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