Ion-trapping devices providing shaped radial electric field
US7858930B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2008 |
| Grant date | Dec 28, 2010 |
| Priority date | — |
| Expiry date | Jul 3, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed are ion cyclotron resonance (ICR) cells and other ion-trapping cells with plural groups of multiple trapping electrodes for shaping (e.g., flattening) the radial electric field within the ICR cell. Also disclosed are methods for controlling the electric field to diminish effects of de-phasing. The diminished effects are achieved by decreasing space-charge contributions by increasing the length of the ion-oscillation path along the z-axis of the ICR cell. The methods and devices enhance the time-domain signal of a Fourier-transform ion-cyclotron resonance mass spectrometer (FTICR-MS) and provide enhanced resolution and accuracy of mass measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.