Electron attachment apparatus and method
US4713548A · kind A · utility
5Cited by
2References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1985 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Nov 12, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J27/028
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Apparatus which can be used for producing negative ions in a gaseous or liquid fluid is disclosed, as well as methods of using the apparatus to determine electron attachment parameters, to identify species in the fluid, or to separate selected species from the fluid. The apparatus comprises a photoelectron emitter, including a UV light source, which can be operated in pulsed or continuous modes, and a photocathode; in addition, a radially-spaced, coaxial negative ion collector, including a negative ion receiving plate, at least one of the photocathode and the receiving plate having cylindrical configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.