Portable mass spectrometer with atmospheric pressure interface
US8471199B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2012 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Apr 6, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/0013
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A portable mass spectrometer having an atmospheric pressure interface for introducing ions generated at ambient pressure gas conditions into a vacuum of the mass spectrometer. The mass spectrometer has a vacuum chamber having at least one vacuum section and at least one gas inlet for directing the ambient pressure gas including the ions into the at least one vacuum section. The at least one gas inlet has a gas passage channel of a length L and a limiting cross section S with a ratio of L/S being less than 20,000 cm−1. The mass spectrometer has a radio frequency (RF) ion guide in the at least one vacuum section positioned for collecting the ions from the at least one gas inlet and transmitting the ions further to a mass analyzer for analyzing the ions transmitted from the ion guide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.