Ion population control device for a mass spectrometer
US8445845B2 · kind B2 · utility
6Cited by
7References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2010 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Jan 20, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/4265
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A mass spectrometer is disclosed wherein an ion beam attenuator is arranged upstream of an ion trap mass analyser. An ion tunnel ion trap comprising an upstream ion accumulation section and a downstream ion accumulation section is arranged upstream of the ion beam attenuator. Ions are released from the ion tunnel ion trap and the intensity of the ion beam which is transmitted to the ion trap analyser is controlled by the ion beam attenuator. The fill time during which ions are admitted into the ion trap mass analyser remains substantially constant and is substantially independent of the intensity of the ion beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.