Multiple sheet beam gridded electron gun
US4873468A · kind A · utility
6Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 1988 |
| Grant date | Oct 10, 1989 |
| Priority date | — |
| Expiry date | May 16, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J33/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A gun for generating a multiple sheet beams 50 of electrons has a flat surfaced cathode 10 with parallel protruding ridges 12 of non-emitting material forming parallel focus electrodes for the sheet beamlets. A control grid of parallel bars 14 is aligned with the ridges 12 to reduce grid interruption. The beamlets may be focussed between support bars 54 of a foil anode 52 for passing the beam into a high-pressure volume such as a gas laser 48. The ridges are formed by inserting non-emissive bent sheets into grooves 58 in the cathode, which are dovetailed to hold them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.