OUTGASSING EXPERIMENT ON A SATELLITE COMPONENT USING BAKE-OUT CHAMBER

摘要

Satellite components can be contaminated in the process of manufacturing, transporting, andrnhandling of the components. Under orbit environment in space which is characterized as a high vacuumrnwith severe solar beam, the contamination material is outgassed and sticks to the other surface ofrnsatellite, such as optics and solar cells. As a result, the satellite is deteriorated in its important functionrnand hence cannot achieve the designed mission. To avoid such unfavorable situations and exert the bestrnperformance of the satellite, degassing process should be performed for components and subsystems ofrnthe satellite under high vacuum condition with hot temperature for a specified period of time. In thisrnpaper, outgassing experiment was carried out for a development model (DM) of solar panel for KorearnMulti-purpose Satellite(KOMPSAT-II) using the bake-out chamber, which consists of vacuum system,rnthermal system, and measurement system. Temperature and pressure of the chamber was maintainedrnaround 120℃ and 10~(-5) torr, respectively. Residual gases including H_2O, N_2, O_2, CO_2, H_2 were detectedrnand outgassing rate of total contaminant was also measured. This paper aims to introduce and review therncontamination control process for a small satellite, especially in the case of KOMPSAT-II application.