X-ray tube with a cooled gate electrode
AssigneeSiemens Healthineers AG
InventorsLukas Havla, Michael Diez
Life of this patent
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Abstract
An X-ray tube includes a tube body that encloses a tube volume in a gas-tight manner. An emitter electrode, a gate electrode, and an anode are arranged within the tube volume. The emitter electrode is an unheated electrode having emitter needles in an area facing the gate electrode, which are themselves arranged on a substrate. The arrangement of the emitter electrode and the gate electrode are coordinated such that applying an emission voltage between the emitter electrode and the gate electrode causes electrons to be emitted from the multitude of emitter needles due to the resulting electrical field. The gate electrode is connected with thermal conductivity via a connecting element to a heat sink arranged outside the tube volume.
Claims20
An X-ray tube, comprising:
- a tube body enclosing a tube volume in a gas-tight manner;
- and
- an emitter electrode, a gate electrode, and an anode arranged within the tube volume;
- wherein
- the emitter electrode is an unheated electrode, which has a multitude of emitter needles in an area facing the gate electrode, the multitude of emitter needles being arranged on a substrate,
- an arrangement of the emitter electrode and the gate electrode is coordinated such that applying an emission voltage between the emitter electrode and the gate electrode causes electrons to be emitted from the multitude of emitter needles due to a resulting electrical field,
- the gate electrode is connected, with thermal conductivity via a connecting element, to a heat sink arranged outside the tube volume,
- the gate electrode has pins on a side facing the emitter electrode,
- the multitude of emitter needles are embedded in a layer such that the layer mechanically stabilizes the multitude of emitter needles, and
- the layer is a thermally conductive layer.
Dependencies are inferred from the claim text.