Ion beam generating apparatus with electronic switching between multiple cathodes
US5089707A · kind A · utility
1Cited by
8References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1990 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Nov 14, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J27/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An ion generating apparatus utilizing a vacuum chamber with an anode and multiple, selectively operable, cathodes in the chamber. The vacuum chamber is grounded and all but the cathode or cathodes selected for use are grounded to the chamber. The anode is a high-transparency screen, preferably formed from a copper alloy. The cathodes are preferably arranged in a generally circular array, parallel to each other, so that any can be fired by a single trigger cathode assembly positioned adjacent to the array. A linear feed mechanism for moving any cathode toward the anode as cathode material is consumed may be provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.