Mass spectrometer and method applied thereby for reducing ion loss and succeeding stage vacuum load
US10192728B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2016 |
| Grant date | Jan 29, 2019 |
| Priority date | — |
| Expiry date | Jun 20, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The disclosure relates to a mass spectrometer and a method applied thereby for reducing ion loss and succeeding stage vacuum load. The mass spectrometer includes an ion source connected via vacuum interfaces, a vacuum chamber and a succeeding stage device; wherein a tubular lens is arranged above a Mach disc formed by a gas flow carrying ions at the vacuum interfaces, so that an ion transfer path is restrained and the ions scattering with the gas flow is reduced. In comparison to a sole reliance on a radio-frequency voltage for focusing ions, the efficiency of ion capture in a jet region is improved by using an aerodynamic lens; and the desolvation efficiency of electrically charged droplets is also improved, thereby further improving the sensitivity of the mass spectrometer. Meanwhile the tubular aerodynamic lens is simple in structure and small in size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.