Time of flight mass spectrometer and detector therefor
US6229142A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1999 |
| Grant date | May 8, 2001 |
| Priority date | — |
| Expiry date | Dec 17, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An ion detector (27) for use in a time-of-flight mass spectrometer (1) is disclosed. The ion detector (27), which has an extended dynamic range, comprises collection electrodes (36, 38; 39) of different surface areas. In one embodiment the collection electrodes (36, 38; 39) are formed in an array consisting of a larger plate-like collection electrode (36, 38) and a smaller plate-like collection electrode (39). Microchannel multiplier plates (31, 32) may be arranged in front of the collection electrodes (36, 38; 39). In an alternative embodiment the collection electrodes consist of a grid (42) or, more preferably, a wire electrode (50) disposed in front of a plate-like electrode (43).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.