Gasjet simulator of the solar VUV and USX radiation and the effect of its radiation on some materials

1Verkhovtseva, ET, 2Yaremenko, VI, 1Telepnev, VD
1B.Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, Kharkiv, Ukraine
2B.Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, Kharkiv
Kosm. nauka tehnol. 1998, 4 ;(2):102–109
Section: Space Materials and Technologies
Publication Language: Russian
The paper is concerned with the desing and spectral, energetic, and operational features of a unique simulator of the solar vacuum ultraviolet (VUV) and ultra-soft X-ray (USX) radiation covering the wavelength range from 5 to 170 nm. The simulator is destined to investigate the effect of solar VUV and USX radiation on space technology materials as well as on the efficiency of space apparatuses and their systems. The electromagnetic radiation is emitted by a supersonic jet of a gas mixture flowing out into a vacuum chamber, where it is excited by an electron beam. The gas jet is removed by a cryogenic pump and other pumping means. The simulator allows the VUV and USX radiation to be injected through an aperture into a high-vacuum chamber (10~6-10~ mm Hg) within a large solid angle and to irradiate objects of large area. The irradiance produced by the simulator may be ten times greater than the solar irradiance in an Earth satellite orbit. We give some examples of the effect of the simulated solar VUV and USX radiation on physico-mechanical and tribotechnical characteristics of some space technology materials.
Keywords: irradiance, simulator, solar radiation
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