| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2009: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2007: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Research Abstract |
The purpose of this study is to clarify the desorption and adsorption phenomena of the molecular contaminations from spacecraft thermal control materials exposed to atomic oxygen and vacuum ultraviolet from the physicochemical point of view. The desorption and adsorption properties of the reaction products in various atomic oxygen exposure conditions were analyzed by using the temperature-controlled quartz crystal microbalance. The following results were obtained : (1) Molecular contaminations from the fluorinated polymer and polyimide were generated by atomic oxygen and vacuum ultraviolet exposure alone, (2) A synergistic effect of on the simultaneous exposure of atomic oxygen and vacuum ultraviolet from a fluorinated polymer was not observed, (3) The amount of molecular contamination from a fluorinated polymer increased exponentially with increasing of the average collision energy of atomic oxygen, (4) The reaction products (contamination) from polyimide during atomic oxygen exposure increased at higher temperature.
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