Abstract
We study the effect of intense laser radiation on the surface of silicate glass prior irradiated by gamma radiation. Experimental results show that the gamma radiation with dose 5 × 104 R leads to the degradation of the surface resistance of this optical dielectric to electromagnetic radiation. Depending on the dose of the radiation the laser radiation can result in either surface erosion or its pronounced cracking. It is also found that the efficiency of the degradation process is determined not only by the radiation dose, but also by the presence of different impurities in the glass.
Highlights
Optical materials, in particular silicate glass, are used in different experimental conditions with the increased dose of radiation [1]
In this work we study the effect of gamma-radiation-created-defects on the interaction of laser radiation with the surface of silicate glass
Microscopic analysis of the target surface shows that the damage of the surface by the laser radiation occurs in the form of craters with molten edges, inside of which there are small cavities
Summary
In particular silicate glass, are used in different experimental conditions with the increased dose of radiation [1]. The resistance of such optical dielectrics to electromagnetic radiation has received a lot of attention after creation of powerful lasers and their application in broad area of science and technology. High purity silicas are being considered as the main candidate materials for use as windows and optical components (lenses, optical fibres) for diagnostics and remote handling systems in International Thermonuclear Experimental Reactor due to their radiation hardness Depending on the intensity of the laser radiation (q) the interaction can result in “peeling” of the surface of the opt-
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