Measuring methods for ion cyclotron resonance mass spectrometers
US7495211B2 · kind B2 · utility
14Cited by
16References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2005 |
| Grant date | Feb 24, 2009 |
| Priority date | — |
| Expiry date | Aug 19, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to measuring methods and corresponding measuring cells for ion cyclotron resonance mass spectrometers (FTMS). The invention provides measuring methods with measuring cells, the ends of which each incorporate a large number of trapping electrodes, DC voltages of opposite polarities being applied across adjacent electrodes. For orbiting ions this builds up a repelling pseudopotential, which holds the ions in the measuring cell by reflection. This facilitates measurement of the image currents without the disturbing influence of RF voltages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.