Changes in K-208 glass transmittance spectra under ionizing radiation and molecular fluxes

The effect of 40-keV electron and proton radiation with a flux density of 5 × 10 cm-2 s-1 on the deposition of products of thermostimulated gas release from a polymer composite on a substrate made from protective K-208 glass used for the protection of spacecraft solar panels is experimentally investigated. Analysis of the obtained results shows that, unlike proton radiation, electron radiation results in an increase in the optical density of the glass and stimulates the deposition of gas-release products. It is established that the majority of effects generated as a result of exposure of the substrate to electron radiation are neutralized by protons upon combined irradiation with electrons and protons. © 2014 Pleiades Publishing, Ltd.