The creation of a high vacuum zone in the aerodynamic wake behind a protective screen in the conditions of orbital flight on the altitude H = 250 – 400 km

At the heights of orbital flight at the transverse flow around the protective shield unperturbed oncoming flow in the aerodynamic wake behind it there is a stable natural region of high vacuum. In this area of the «space» vacuum the levels of vacuum of the order are reached 10–14 – 10–10 mm Mercury and below in the almost complete absence of oxygen and carbonaceous components. When assessing the achieved levels of dilution, it was assumed that the working («shadow») protective shield surface pre-adsorbed impurities are removed, and the speed of its own gas in the area of the track does not exceed this level, which corresponds to a partial pressure of about 10–14 mm Mercury. The results of the evaluations also showed that from the environment into the vacuum zone for protective shield mostly fall into the «fast» molecules of He and H2, the thermal velocity which significantly exceed the orbital velocity of flight, and their partial pressure at altitudes of 250 – 400 km five to six orders of magnitude lower compared to the above-mentioned partial pressure of molecules of gas. This article is devoted to the development of the scientific basis of the experiment in the conditions of the orbital flight of the international space station and the justification of its feasibility.