High performance X-ray target
AssigneeGeneral Electric Company
InventorsThomas C. Tiearney, Thomas Robert Raber, Pazhayannur Ramanathan Subramanian, Srihari Balasubramanian
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Abstract
A brazed X-ray target includes a metallic cap and a graphite back including a nonlinear record groove attached thereto along a stepped surface. An upper corner joint of the stepped surface is distanced from a cap outer edge and a focal track where the maximum heat is generated during use of the target. The graphite back is extended outward toward the cap outer edge to increase a thermal storage of the graphite, and a recess is formed into the cap to maintain a selected moment of inertia of the target and thereby maintain the rotordynamics of a given X-ray tube.
Claims19
A method for preventing separation of a cap from a graphite back of a circular X-ray target, the graphite back attached to the cap by metal brazing along a step joint including a corner, the cap including an outer edge and a focal track, said method comprising the steps of
- positioning a step radially inward from the cap outer edge a distance that is approximately equal to a distance that the focal track extends from the cap outer edge, thereby reducing a heat load on the corner, said cap fabricated from an oxide dispersion strengthened molybdenum alloy (ODS Mo);
- and
- extending the graphite radially outward, thereby increasing a thermal storage of the graphite and reducing a thermal stress.
An X-ray target comprising:
- a circular cap comprising an outer edge, a focal track, and a step adjacent said outer edge, said step extending radially inward from said outer edge a distance that is approximately equal to a distance that said focal track extends from said cap outer edge, said cap comprises an oxide dispersion strengthened molybdenum alloy (ODS Mo);
- and
- a back brazed to said step and extending radially beyond said step.
An X-ray target comprising:
- a rotational axis;
- an oxide dispersion strengthened molybdenum alloy (ODS Mo) cap comprising a first surface, a second surface, and an outer edge, said second surface comprising a step adjacent said outer edge, said cap generally symmetrical about said rotational axis;
- a tungsten-rhenium alloy focal track formed on said first surface adjacent said edge;
- a graphite back comprising a top surface and a nonlinear record groove formed on said top surface;
- said graphite back brazed to said step along said record groove;
- and
- a recess formed into said first surface between said focal track and said rotational axis.
Dependencies are inferred from the claim text.