Patent ID: 7428298
Filing Date: 2008-09-23
Classification: H01J,H05G

Abstract:
1. An X-ray source device with a magnetic appliance coupled to its anode for electron beam focusing, comprising: a) an evacuated tube; b) an anode, coupled to the tube, including a material configured to produce X-rays in response to impact of electrons; c) a cathode, coupled to the tube opposing the anode, including a cathode element, configured to produce electrons accelerated towards the anode in response to an electric field between the anode and the cathode, d) an annular magnetic appliance, circumscribing the anode, to focus an electron-beam; and e) wherein the annular magnetic appliance provides focusing of an electron beam within the X-ray source device, the resulting focused electron beam having a cross-sectional diameter reduced to at least 1/2 to 1/50