X-Ray Sources

摘要

This specification describes an anode for an X-ray tube with multiple channels, where each channel defines an electron aperture through which electrons from a source pass to strike a target and a collimating aperture through which X-rays produced at the target pass out of the anode as a collimated beam. At least a portion of the walls of each channel are lined with an electron absorbing material for absorbing any electrons straying from a predefined trajectory. The electron absorbing material has a low atomic number, high melting point and is stable in vacuum. Graphite may be used as the electron absorbing material.

主权项

1. An anode for an X-ray tube comprising a source of electrons and multiple channels, each channel comprising:
a target defined by a plane; an electron aperture through which electrons from the source of electrons pass to strike said target, wherein said electron aperture comprises side walls, each of said side walls having a surface, and a central axis; and a collimating aperture through which X-rays produced at the target pass out of the anode as a collimated beam, wherein said collimating aperture comprises side walls, each of said side walls having a surface, and a central axis and wherein at least a portion of the surfaces of the side walls of the electron aperture and the surfaces of the side walls of the collimating aperture are lined with an electron absorbing material.