Wire-ion-plasma electron gun employing auxiliary grid
US4642522A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1984 |
| Grant date | Feb 10, 1987 |
| Priority date | — |
| Expiry date | Jun 18, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J3/021
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved Wire-Ion-Plasma Electron-gun (WIP E-gun) is disclosed, having a very rapid electron beam current interruption capability. An auxiliary grid is employed to provide a potential barrier to the reservoir of plasma ions in the ionization chamber, thereby containing these ions in the chamber after the wire anode is turned "OFF". The E-gun current fall time is reduced to the time required for the plasma potential to fall in the ionization chamber after the wire anode is turned "OFF". The WIP E-gun current fall time is reduced, from greater than fifteen microseconds for devices not employing the invention, to less than two microseconds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.