Hybrid photomultiplier tube with high sensitivity
US5374826A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1993 |
| Grant date | Dec 20, 1994 |
| Priority date | — |
| Expiry date | Jul 14, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A focused electron/bombarded (FEB) ion detector comprising an MCP, focusing means, and a collection anode disposed in a detector body. The collector anode includes a diode for receiving the focused output electron beam from the MCP. The gain between the input ion current to the MCP and the detector output signal from the diode is on the order of 1-100 million, depending on the device configuration and applied biasing voltages. A hybrid photomultiplier tube includes a photocathode, a photodiode for collecting and multiplying electrons emitted by the photocathode and providing an output signal and electrodes for focusing the electrons on the photodiode. A vacuum envelope encloses a vacuum region between photocathode and the detector. A conductor disposed on or adjacent to a sidewall of the vacuum envelope reduces the effect of electrical charges on the inside wall of the vacuum envelope on the trajectories of the electrons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.