Geometric analysis of image contours formation on the X-ray screen

In this theoretical work, the image contour formation in radioscopy of large scale power installations on solid propellant is investigated. It is shown that receiving the information about profile coordinates of charge surface from the visible image contours leads to erroneous results of using an enlargement coefficient. The formulae for dimensioning the charges of cylindrical, spherical and conical forms per coordinate of image contour are obtained. Inaccuracies in dimensioning because of imperfection in setting of X-ray screen and image position on the screen field are determined. The results, which are presented graphically and analytically, will give an opportunity for users to plan the testing geometry in an optimal way and help in analysing the results correctly.