Mass spectrometer capable of multiple simultaneous detection
US4998015A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 1989 |
| Grant date | Mar 5, 1991 |
| Priority date | — |
| Expiry date | Jul 13, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/284
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is disclosed a mass spectrometer capable of multiple simultaneous detection. The operation mode of the instrument can be switched between a mode in which a wide mass range is obtained and another mode in which high resolution is obtained. The spectrometer includes a mass analyzer having at least a sector magnetic field and a two-dimensional ion detector placed along a focal plane of the analyzer. The detector detects simultaneously ions focused and dispersed by the analyzer according to mass-to-charge ratio. A lens means having variable magnitude is disposed in the ion path between the magnetic field and the detector. A position-adjusting means places the detector along the focal plane which differs, depending upon the magnitude of the lens means. There is further disclosed a mass spectrometer which is capable of multiple simultaneous detection and includes said lens means and a lens magnitude-varying means. In this instrument, the lens means consists of two quadrupole lenses arranged in series. The lens magnitude-varying means causes the quadrupole lenses to assume one of predetermined sets of magnitudes such that the intersection of the central orbit or ions and the ion foc…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.