Multipole ion mass filter having rotating electric field
US7183545B2 · kind B2 · utility
2Cited by
36References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 15, 2005 |
| Grant date | Feb 27, 2007 |
| Priority date | — |
| Expiry date | Mar 15, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/421
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of operating an ion filter for selecting ions and related apparatus. The filter have a plurality of elongated electrodes, and the ions have a secular frequency. The method comprises exciting each elongated electrode with a first voltage component, the first voltage component having a first amplitude and a first frequency; exciting each elongated electrode with a second voltage component, the second voltage component having a frequency substantially equal to a secular frequency of motion for the ion; and generating an electric field and rotating the electric field around the axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.