The outgassing characteristic research of the silicone rubber in high-power laser system

摘要

The outgassing characteristic of the silicone rubber which is the main material of non-metallic materials in high power laser system was studied, outgassing rates of the silicone rubber and the baked-out silicone rubber which was performed at 80°C4 hours were measured by the constant volume process method, and outgassing properties of them were analyzed by the quadrupole mass spectrometer. The results show that the outgassing rate of the silicone rubber and the baked-out silicone rubber is 2.69×10~(-7) Pa·m~3s~(-1)cm~(-2) and 6.47×10~(-8) Pa·m~3s~(-1)cm~(-2), respectively. All of them give out condensable volatile matter in vacuum. The outgassing rate and condensable volatile matter of the baked-out silicone rubber are less an order of magnitude compared with the silicone rubber, and the outgassing rate of the silicone rubber is less than 1×10~(-7) Pa·m~3s~(-1)cm~(-2), which is fit for non-metallic material of the high power laser system. This paper also discusses the method of reducing the outgassing rate and condensable volatile matter of the silicone rubber in high power laser system.