Aperture shield incorporating refractory materials
US8000450B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 25, 2007 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Feb 18, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2235/168
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An x-ray tube electron shield is disclosed for interposition between an electron emitter and an anode configured to receive the emitted electrons. The electron shield is configured to withstand the elevated levels of heat produced by electrons backscattered from the anode and incident on the electron shield. This in turn equates to a reduced incidence of failure in the electron shield. In one embodiment the electron shield includes a body that defines a bowl-shaped aperture having a narrowed throat segment. The body of the electron shield includes a first body portion, a second body portion, and a disk portion. These portions cooperate to define the bowl and the throat segment. The throat segment and the lower portion of the bowl are composed of a refractory material and correspond with the regions of the electron shield that are impacted by relatively more backscattered electrons from the anode surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.