Ion focussing and conveying device and a method of focussing the conveying ions
US6894286B2 · kind B2 · utility
12Cited by
4References
49Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2001 |
| Grant date | May 17, 2005 |
| Priority date | — |
| Expiry date | Nov 23, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/065
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An ion focussing 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 focussed onto an axis of travel and impelled along the series of electrodes 12.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.