EXPERIMENTAL INVESTIGATION OF INTERACTION THE HIGH-VELOCITY FREE MOLECULAR BEAMS OF ATOMS AND MOLECULES WITH SOLID SURFACES
The interaction of free molecular beams of nitrogen molecules - <i>N</i><sub><i></i>2</sub>, <i>He, Ne, Ar </i>- atoms with the surface of the flat plates were investigated experimentally in the vacuum facility VAT-103 TsAGI. The plates were made of an anodized aluminum-magnesium alloy and glass. The dependency of the force acting on plate upon the velocity and molecular mass at normal incidence are studied. The available experimental data upon the interaction of high-velocity free molecular nitrogen and argon beams with engineering surfaces are analyzed. Approximate representation normal component of the reflected flux moments against the energy of incident flow are obtained. The flow of gas mixture through a nozzle into vacuum are investigated by the direct simulation Monte Carlo method. These calculations were carried out for operating conditions of VAT-103 facility. The enrichment factors for heavy components in <i>He-Ar </i>and <i>He-O </i>mixtures are obtained at small Reynolds number. These data were used for mixture flow diagnostics.