Study of the combined action of high-speed flows of finely dispersed particles, plasma, and short-wavelength radiation on optical materials accompanying thermal cycling under vacuum conditions

摘要

This paper presents the results of an experimental investigation of the degradation of a series-produced optical coating made from lead fluoride on a substrate made from IKS-25 chalcogenide glass after the combined action of high-speed fluxes of solid microparticles (carbon-containing, microparticles of size 0.1-200 mu m, with a speed of 0.1-30 km/sec and a flux density of up to 10(4) cm(-2) sec(-1)), a relaxing plasma (with a concentration of atoms and ions of oxygen, carbon, hydrogen, nitrogen and their compounds of about 10(14) -10(17) cm(-3), a flux density of up to 10(23) cm(-2) sec(-1) and a flux speed up to 10 km/sec), short-wavelength radiation (with an exposure of 0.1 J/cm(2) in the vacuum UV region of wavelengths 90-180 nut and 1.2 J/cm(2) in the UV region with wavelengths 180-400 nm) under vacuum conditions (with pumping to 10(-7)-10(-5) Torr) accompanying thermal cycling (in the temperature range -20 to + 160 degrees C). An estimate is given of the possibility of using the described methods to physically model the action on optical materials of the main harmful factors in low near-earth orbits. (C) 2008 Optical Society of America.