Imaging dynodes arrangement
US4649268A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1984 |
| Grant date | Mar 10, 1987 |
| Priority date | — |
| Expiry date | Mar 9, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J43/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An imaging dynodes arrangement for an electron multiplier, which comprises a first and a second imaging dynodes having dynode cones with a cone tip and a cone base, said dynode cones being connected with each other such that they form free cavities therebetween. Furthermore, there are needle-shaped extraction points arranged at the cone tips of at least the dynode cones of the second imaging dynode. The second imaging dynode is mounted beneath the first imaging dynode in a staggered position such that the cone tips of the dynode cones of the second imaging dynode are seated beneath the cavities of the first imaging dynode, directing the needle-shaped extraction points closely to the cavities. In a preferred embodiment the needle-shaped extraction points protrude into the cavities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.