Patent ID: 9524845
Filing Date: 2016-12-20
CPC Classification: H01J

Claim Text:
1. An x-ray tube cathode comprising: an evacuated enclosure; a magnetic yoke extending between a first portion inside and open to the interior of the evacuated enclosure, and a second portion outside of the evacuated enclosure; a cathode head comprising electrically conductive and non-magnetic material integrated with a first magnetic material portion and a second magnetic material portion, the cathode head defining an emitter slot in a portion of the electrically conductive and non-magnetic material positioned between the first magnetic material portion and the second magnetic material portion, the first magnetic material portion and the second magnetic material portion coupled to the second portion of the magnetic yoke outside of the evacuated enclosure via the first portion of the magnetic yoke inside and open to the interior of the evacuated enclosure; and an electron emitter positioned within the emitter slot, the electron emitter configured to emit a beam of electrons, the beam of electrons configured to be both focused by the electrically conductive and non-magnetic material and steered during beam formation by the first magnetic material portion and the second magnetic material portion.