Emitter-cup cathode for high-emission x-ray tube
US5907595A · kind A · utility
147Cited by
6References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 18, 1997 |
| Grant date | May 25, 1999 |
| Priority date | — |
| Expiry date | Aug 18, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J35/066
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An x-ray tube has at least one approximately planar electron emitter and an emitter-cup cathode configured to provide an electron beam of substantially greater perveance and beam compression ratio than otherwise obtainable with conventional cathode designs. The cup is optimized for use in a line-focus, planar-anode tube and has a slot in which the emitter is situated, an adjacent face region which is planar and angled so as to properly form the initial electron beam, a recess to allow the initial electron beam to be accelerated without significant shaping, and an overhanging portion which completes the electron beam forming.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.