Integral coefficients of reflection for the electron beam scattered in a foil and air from semi-infinite absorbers

With the purpose to determine the corrections for electron backscattering introduced when measuring the current and power characteristics of the radiation field of the electron accelerator with a scanned beam by the method of total or partial absorption, the integral reflection coefficients are calculated by the Monte-Carlo method. The reflection of the electron beam passed through the accelerator convex Al or Ti foil 50 μm thick and the layer of air 50, 100 and 150 mm thick from the semi-infinite C and Fe absorbers is considered in the 48-160 phiJ energy range. The relations between integral coefficients of reflection from the C, Al, Ti, Cu absorbers are experimentally determined. On the base of the obtained data analysis the conclusion is drawn that integral reflection coefficients are independent on the air layer thickness