Concentrating mass spectrometer ion guide, spectrometer and method
US7932488B2 · kind B2 · utility
5Cited by
20References
10Claims
0Family size
Inventors
Key dates
| Filing date | May 7, 2009 |
| Grant date | Apr 26, 2011 |
| Priority date | — |
| Expiry date | Sep 12, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/066
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An ion guide includes multiple stages. An electric field within each stage guides ions along a guide axis. Within each stage, amplitude and frequency, and resolving potential of the electric field may be independently varied. The geometry of the rods maintains a similarly shaped field from stage to stage, allowing efficient guidance of the ions along the axis. In particular, each rod segment of the ith of stage has a cross sectional radius ri, and a central axis located a distance Ri+ri from the guide axis. The ratio ri/Ri and is substantially constant along the guide axis, thereby preserving the shape of the field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.