A “spinning target X-ray generator” and its input limit

Abstract

It is desirable in many X-ray investigation that the specific intensity of the X-rays should be increased. By specific intensity is meant the amount of energy emitted in a second from the unit area of the focus in the X-ray generator. A limit for the specific input is soon reached in an ordinary deterioration of the target surface. How the limit of input depends upon the material, size of the focus and dimensions of the anticathode has been shown by the writer in a previous note. The designers of X-ray tubes have already tried to avoid this limitation, and one of the methods suggested we to keep the target moving and so to carry the heat away from the spot where it is produced.