Effect of material outgassing and contamination deposition induced by vacuum and temperature on spacecraft optical components

Silicon rubber and gray cable commonly used on spacecraft was selected as contamination sources, quartz crystal microbalance (QCM) was used as a monitoring device for molecular contamination deposition, and quartz glass was used as a collection plate for molecular contamination. The influence of different temperatures such as 100 degrees C, 125 degrees C, 150 degrees C on the outgas contamination of silicone rubber and gray cable research was carried out in a vacuum environment, and the influence of different deposition temperature such as 10 degrees C, 25 degrees C, 40 degrees C, 55 degrees C, 70 degrees C on the amount of contamination deposition was studied too. The spectral properties and morphology changes of quartz glass at a heating temperature of 125 degrees C on the contamination sources and a deposition temperature of 25 degrees C were studied. The research results show that as the deposition time increases, the amount of contamination deposits approximately linearly increases. With the increase of space temperature, the amount of outgas contamination deposits increases significantly, and as the temperature of the deposition surface increases, the contamination deposits exponentially decreases. The contamination deposits on the surface of quartz glass are in the form of droplets, and the droplets are of different sizes and randomly distributed. After being contaminated by molecular contamination, the optical transmittance of quartz glass significantly decreases.