Ion focussing and conveying device and a method of focussing and conveying ions
US7375344B2 · kind B2 · utility
6Cited by
8References
62Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2005 |
| Grant date | May 20, 2008 |
| Priority date | — |
| Expiry date | May 31, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/065
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An ion focusing and conveying device 10 comprises a plurality of electrodes 12 in series. Means is provided to apply a first alternating voltage waveform to each electrode 12, the phase of the alternating voltage in the first waveform is applied to each electrode 12 in the series being ahead of the phase of the first alternating voltage waveform applied to the preceding electrode 12 in the series by less than 180°, preferably by 90° or less, such that ions are focused onto an axis of travel and impelled along the series of electrodes 12.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.