Sub-atmospheric pressure laser ionization source using an ion funnel
US11107669B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2018 |
| Grant date | Aug 31, 2021 |
| Priority date | — |
| Expiry date | Sep 5, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system and method for sample analysis using sub-atmospheric pressure (sub-AP) laser ionization. The sub-AP ion source includes a holder with a sample containing analyte molecules, a pulsed laser beam configured to generate ionized species from the sample, an ion extractor adjacent to the holder configured to extract analyte ions from the ionized species by an extraction electric field Es near the sample, an ion funnel structure composed of orifice electrodes located along an ion funnel pathway direction z. The ion funnel structure has an entrance and an exit, the exit being the electrode with the smallest aperture in the structure. This structure is configured for accepting the analyte ions from the ion extractor at the entrance and dragging them toward the exit using an axial electric field Ez along the direction z. The extraction electric field Es is at least partly electrically shielded from the axial electric field Ez.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.