Quadrupole field mass analyser
US3935453A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 17, 1974 |
| Grant date | Jan 27, 1976 |
| Priority date | — |
| Expiry date | Sep 17, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/48
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A mass spectrometry apparatus, a quadrupole field mass analyser, is discld together with a novel method of investigating ions in or for mass spectrometry. The apparatus and method employ multiple-channel quadrupole mass filter devices to which the ions are fed via a relatively large entry aperture afforded preferably by a transverseley-split spherical or cylindrical capacitance analyser arranged in conjunction with a stop aperture device to remove ions having energies which are not within a predetermined energy band. The ions are accelerated into the first half of the capacitance analyser, decelerated to pass into the filter devices, and then reaccelerated to the ion detection device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.