Multipole ion transport apparatus and related methods
US8124930B2 · kind B2 · utility
11Cited by
11References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 5, 2009 |
| Grant date | Feb 28, 2012 |
| Priority date | — |
| Expiry date | Mar 12, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/063
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An ion transport apparatus includes an ion entrance end, an ion exit end, and electrodes arranged along a longitudinal axis from the ion entrance end toward the ion exit end. The electrodes are configured for applying an RF electrical field that varies along the longitudinal axis such that at the ion entrance end, the RF electrical field comprises a major first multipole component of 2n1 poles where n1≧3/2, and at the ion exit end the RF electrical field comprises predominantly a second multipole component of 2n2 poles where n2≧3/2 and n2<n1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.