Ion cyclotron resonance mass spectrometer
US7038200B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 2004 |
| Grant date | May 2, 2006 |
| Priority date | — |
| Expiry date | Apr 28, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention describes an ion cyclotron resonance (ICR) mass spectrometer with an ICR trap, the ICR trap having as trapping electrodes two ion reflecting electrode structures operated by RF voltages without any DC voltage. The usual apertured ion trapping electrodes are replaced by multitudes of structural elements, electrically conducting, and repeating spatially in one or two directions of a surface, neighboring structure elements being connected each to different phases of an RF voltage. In the simplest case a grid of parallel wires can be used. The surface of such structures reflects ions of both polarities, if the mass-to-charge ratio of the ions is higher than a threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.