Investigation of Optical Properties of Dielectric Materials of Radiation Gas-dynamic Power Facilities of High Density of Output

Results are presented of experimental vacuum tests of optical properties — optical transparency, spectral absorption and reflection coefficients, dispersion indicatrix — of some construction dielectric materials, used for radiation gas-dynamic power facilities of high density of output. The tests were conducted in IR- and UV-region of spectrum at standard laser frequencies (λ ~ 0.241, 0.4416, 0.6328, 0.693, 1.06, 10.6 μm). Spectrum-averaged (grouped) reflection coefficients under vacuum ultraviolet radiation (hν ~ 10...70 eV) were explored in conditions under- and over-threshold density of output of exploring radiation for the developed surface evaporation.