Nonthermionic hollow anode gas discharge electron beam source
US4647818A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 16, 1984 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Apr 16, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J37/077
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Apparatus and method for producing a plurienergetic electron beam source. The apparatus includes a housing which functions as an anode, the same having an electron emission window covered by an electron-transparent grid, a cathode body mounted within the housing and electrically isolated therefrom, the spacing between the cathode body and grid being sufficient to permit a gas discharge to be maintained between them having a plasma region substantially thinner than the cathode sheath region. The method involves the simultaneous feeding of gas between a cathode body and an anode grid, applying voltages of about 10 kV to 20 kV and regulating the gas feed rate and the voltage to maintain a discharge condition of the character described above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.