X-ray tube aperture body with shielded vacuum wall

摘要

X-ray tube aperture body with shielded vacuum wall. In one example embodiment, an aperture body for use in an x-ray tube having an anode and a cathode includes an electron shield and a vacuum wall. The electron shield is configured to intercept backscattered electrons from the anode. The vacuum wall is separated by a gap from the electron shield and is shielded from the backscattered electrons by the electron shield. The aperture body also includes an electron shield aperture defined in the electron shield and a vacuum wall aperture defined in the vacuum wall through which electrons may pass between the cathode and the anode.

主权项

1. An aperture body for use in an x-ray tube that provides an evacuated interior having an anode and a cathode, the aperture body comprising:
an electron shield having an electron collection surface including one or more expansion joints formed therein, the electron shield configured to intercept backscattered electrons from the anode; an electron shield aperture defined in the electron shield through which electrons may pass between the cathode and the anode; a vacuum wall separated by a gap from the electron shield and shielded from the backscattered electrons by the electron shield, wherein the gap is disposed within the evacuated interior and is in fluid communication with the evacuated interior, wherein the vacuum wall is electrically coupled to the electron shield such that the aperture body is electrically grounded during operation of the X-ray tube; and a vacuum wall aperture defined in the vacuum wall through which electrons may pass between the cathode and the anode.