High brightness thermionic cathode
US7176610B2 · kind B2 · utility
11Cited by
2References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 10, 2004 |
| Grant date | Feb 13, 2007 |
| Priority date | — |
| Expiry date | Mar 26, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2237/06308
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved thermionic cathode is provided. The cathode has a carbon-coated cone surface and reduced cone angle (e.g. typically 60 degrees or less) that delivers an electron beam with high angular intensity and brightness and exhibits increased longevity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.