Method of forming gated photocathode for controlled single and multiple electron beam emission
US6220914A · kind A · utility
32Cited by
22References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1999 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Nov 24, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2237/31779
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A photocathode having a gate electrode so that modulation of the resulting electron beam is accomplished independently of the laser beam. The photocathode includes a transparent substrate, a photoemitter, and an electrically separate gate electrode surrounding an emission region of the photoemitter. The electron beam emission from the emission region is modulated by voltages supplied to the gate electrode. In addition, the gate electrode may have multiple segments that are capable of shaping the electron beam in response to voltages supplied individually to each of the multiple segments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.