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Spectrometers Results of Material Exposure and Degradation Experiment Onboard International Space Station

机译：国际空间站上物质暴露和降解实验的光谱仪结果

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Material Exposure and Degradation Experiment is an active material experiment exposed to the low-Earth-orbitnenvironment for 18 months onboard ISS/Columbus. This paper focuses on the results of Spectrometer experiment,none of the seven subunits of MEDET. The purpose of this experiment is to measure in real time thermoopticalnproperties of a large set ofmaterials designed for space applications (20 differentmaterials). Some of thesematerialsnhave been developed for atomic oxygen-resistant protection for low-Earth-orbit spacecraft applications. Thenevolution of their thermooptical properties on the International Space Station orbit allows for monitoringnthe degradation of materials mainly due to ultraviolet and atomic oxygen before recovery phenomena take place atnthe time the experiment returns into the atmosphere.Ultraviolet-visible transmission spectra frompreliminary flightndata highlight the two degradation phenomena expected for such a mission, namely: yellowing for atomic oxygennprotected polymeric films and silicone resins due to ultraviolet exposure, and the decrease of thicknesses for othernsamples like polymeric films due to atomic oxygen erosion.
机译：材料暴露和降解实验是在ISS /哥伦布上暴露于低地球轨道环境中18个月的活性材料实验。本文主要关注MEDET七个亚基中没有一个的光谱仪实验结果。该实验的目的是实时测量设计用于太空应用的大量材料（20种不同的材料）的热光学性质。这些材料中的某些已经被开发用于低地球轨道航天器应用的抗原子氧保护。它们在国际空间站轨道上的热光学性质的演变可以监测主要归因于紫外线和原子氧的物质的降解，然后再返回大气层。在实验返回大气之前，紫外可见透射光谱突出显示了这两种降解现象。预期将执行此任务，即：由于暴露于紫外线而使原子氧保护的聚合物膜和硅树脂发黄，以及由于原子氧侵蚀而使其他样品（如聚合物膜）的厚度减小。

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