X-ray tube
AssigneeHamamatsu Photonics K.K.
InventorsHiroki Furuki, Atsushi Ishii
Life of this patent
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Abstract
An X-ray tube includes a housing; an electron gun that emits an electron beam inside the housing; and a target that generates an X-ray upon the electron beam being incident on the target inside the housing. The electron gun includes a cathode that releases electrons, and a focusing electrode that focuses the electrons onto the target as the electron beam. The focusing electrode has a tubular shape having an inner surface and an outer surface. The inner surface includes a first region, and a second region located on a target side with respect to the first region. An average roughness of the second region is smaller than an average roughness of the first region.
Claims10
An X-ray tube comprising:
- a housing;
- an electron gun that emits an electron beam inside the housing;
- and
- a target that generates an X-ray upon the electron beam being incident on the target inside the housing,
- wherein the electron gun includes a cathode that releases electrons, and a focusing electrode that focuses the electrons onto the target as the electron beam,
- the focusing electrode has a tubular shape having an inner surface and an outer surface,
- the inner surface includes a first region, and a second region located on a target side with respect to the first region, and
- an average roughness of the second region is smaller than an average roughness of the first region.
Dependencies are inferred from the claim text.