X-ray tube and X-ray source including same
AssigneeHamamatsu Photonics K.K.
InventorsTomoyuki Okada, Tutomu Inazuru
Life of this patent
Estimating the term…
Abstract
The present invention relates to an X-ray tube in which X-rays are generated by making electrons from an electron gun incident onto an X-ray target of an anode, disposed inside an anode housing unit, and the generated X-rays are taken out from an X-ray emission window. The anode has a straight main body and a protruding portion, extending along an axis line direction of the main body from a tip of the main body. An inclined surface, onto which the electrons emitted from the electron gun collide, and a pair of side surfaces, disposed in parallel while sandwiching the inclined surface, are formed on the protruding portion. A distance between the pair of side surfaces of the protruding portion is shorter than a width of the main body in the same direction as the distance.
Claims9
An X-ray tube comprising:
- an anode housing unit having an X-ray emission window for taking out X-rays generated therein an internal portion;
- an anode, disposed inside said anode housing unit, having an X-ray target;
- an electron gun for emitting electrons toward said X-ray target to generate X-rays in a direction from said X-ray target toward said X-ray emission window;
- an electron gun housing unit in which said electron gun is housed;
- and
- a metal cylindrical member housing a part of said anode in which said X-ray target is included,
- wherein said anode has a main body having a shape extending along a predetermined axis orthogonal to an electron incidence direction from said electron gun, and a protruding portion extending in the axis line direction of said main body from a tip of said main body,
- wherein said protruding portion has an inclined surface that intersects the axis line at a predetermined angle and matches an electron incidence surface of said X-ray target, a pair of side surfaces that extend in the same direction as the axis line and are disposed in parallel while sandwiching said inclined surface, and a rear surface that is sandwiched by said pair of side surfaces and is positioned at an opposite side of said electron gun housing unit with respect to said inclined surface,
- wherein a distance between said pair of side surfaces of said protruding portion is shorter than a width of said main body in the same direction as the distance,
- wherein said metal cylindrical member has a through hole for installation of said electron gun housing unit and is arranged so as for an inner surface thereof to surround a stepped portion constituted by said tip of said main body and at least said pair of side surfaces of said protruding portion, and
- wherein said rear surface of said protruding portion and an outer surface of said main body constitute a consecutive curved surface with no stepped portion.
Dependencies are inferred from the claim text.