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US 10,818,466 B1Granted
X-ray tube and cathode cup with deposition shield
AssigneeGE Precision Healthcare LLC
InventorsDonald Robert Allen, Sandhya Dammu, Andrew Marconnet, Gregory Steinlage
Life of this patent
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Abstract
An x-ray tube includes an electron emitter and a cathode cup having a recess that holds the electron emitter. The recess has a bottom surface, and a shield is positioned in the recess between the electron emitter and the bottom surface. The shield is configured to receive deposited sublimated emitter material and to maintain the sublimated emitter material away from the electron emitter.
Claims16
An x-ray tube comprising:
- an electron emitter;
- a cathode cup having a recess that holds the electron emitter, the recess having a bottom surface;
- a shield positioned in the recess between the electron emitter and the bottom surface, wherein the shield is configured to receive deposited sublimated emitter material and to maintain the sublimated emitter material away from the electron emitter;
- and
- wherein the shield is comprised of a refractory metal material having a coefficient of thermal expansion that is equivalent to that of the sublimated emitter material.
2 more elements
A cathode cup for an x-ray system, the cathode cup comprising:
- a recess for holding an electron emitter, the recess having a bottom surface that faces the electron emitter when the electron emitter is held in the recess;
- a shield positioned between the electron emitter and the bottom surface of the recess, wherein the shield is configured to receive deposited sublimated emitter material and to maintain the sublimated emitter material away from the electron emitter;
- and
- wherein the shield is comprised of a refractory metal material having a coefficient of thermal expansion that is equivalent to that of the sublimated emitter material.
1 more element
Dependencies are inferred from the claim text.