X-ray tube with axial focusing
A dc X-ray tube based on an immersion lens has been designed. The tube consists of electrodes with axial symmetry, a directly heated cathode, and a cylindrical anode; it has a front radiation output and small sizes. 50 and 100 W X-ray tubes and a 1.2 kW demountable tube with a dual Al-Mg anode were designed, running tests were performed, are the main electrical and X-ray optical characteristics were analyzed. The technique developed makes it possible to fabricate anode targets from different materials and to use aluminum, beryllium, or steel output windows. The tube proposed has a wide range of application.