Patent ID: 8213575
Filing Date: 2012-07-03
Classification: H01J

Abstract:
1. An X-ray generating apparatus having a housing containing an electron gun and a target, causing an electron beam emitted from the electron gun to collide with the target, and taking X rays generated from a position of collision out through an X-ray window provided on the housing, wherein the electron gun includes a cathode for emitting the electron beam, at least two intermediate electrodes arranged between the cathode and the target, pins for holding the at least two intermediate electrodes, and a first electrode holding member formed of a conductive member that is in contact with a first electrode of the intermediate electrodes closest to the cathode using the pins, and a potential corresponding to that of the housing is applied to the first electrode, wherein the potentials of the housing and the first electrode are made ground potential, and wherein potentials of all electrodes in the apparatus including the cathode, the target and the intermediate electrodes are zero or positive potential.