Sphericon
US4639642A · kind A · utility
5Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1984 |
| Grant date | Jan 27, 1987 |
| Priority date | — |
| Expiry date | Dec 20, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J25/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spherical RF source tube which requires no magnetic fields for its operation which consists of two concentric spherical shells. The inner shell, which is open and which is nearly transparent to electrons, is charged positively with respect to the grounded outer shell, which is solid. The outer shell contains ports for the vacuum system, for the high voltage bushing that supports the inner shell, for the output coupling devices, and for plasma devices used in starting and maintaining operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.