Electron beam source having an extraction electrode provided with a magnetic disk element
US7372195B2 · kind B2 · utility
6Cited by
19References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2005 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | Nov 22, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2237/06341
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electron beam source for use in an electron gun. The electron beam source includes an emitter terminating in a tip. The emitter is configured to generate an electron beam. The electron beam source further includes a suppressor electrode laterally surrounding the emitter such that the tip of the emitter protrudes through the suppressor electrode and an extractor electrode disposed adjacent the tip of the emitter. The extractor electrode comprises a magnetic disk whose magnetic field is aligned with an axis of the electron beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.