Mass spectrometer
US7309861B2 · kind B2 · utility
30Cited by
0References
96Claims
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Assignee
Inventors
Key dates
| Filing date | Sep 3, 2003 |
| Grant date | Dec 18, 2007 |
| Priority date | — |
| Expiry date | Aug 6, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/062
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A mass spectrometer is disclosed comprising a guide wire ion guide 1 having an outer cylindrical electrode 2 and an inner guide wire electrode 3. AC and DC potential differences are maintained between the outer electrode 2 and the inner electrode 3 so that ions are radially confined within the ion guide 1 in an annular potential well. The outer electrode 2 may be segmented and axial potential wells created along the length of the ion guide 1 may be translated along the length of the ion guide 1 by applying additional transient DC potentials to the segments forming the outer electrode 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.