Effects of Vacuum on Fused Silica UV Damage |
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| Authors: | XU Shi-Zhen LV Hai-Bing YUAN Xiao-Dong HUANG Jin JIANG Xiao-Dong WANG Hai-Jun ZU Xiao-Tao ZHENG Wan-Guo |
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| Institution: | Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900 |
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| Abstract: | Damage points induced by 355 nm laser irradiation increase more quickly on the surface of fused silica in vacuum of about 10^-3 Pa than in atmospheric air at the same fluence. The larger concentration of point defects in vacuum is confirmed by photoluminescence intensity. X-ray photoelectron spectroscopy and infrared absorption indicate the formation of sub-stoichiometric silica on the surface. The degradation mechanism of fused silica in vacuum is discussed. |
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| Keywords: | 61 80 Ba 42 70 Ce 61 72 Ji |
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