Tandem ion-trap time-of-flight mass spectrometer
US7897916B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2005 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | Jan 13, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/423
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A tandem linear ion trap and time-of-flight mass spectrometer, where the ion trap has a straight central axis orthogonal to the flight path of the mass spectrometer. The ion trap comprises a set of electrodes, (401, 403, 402, 404) at least one of the electrodes has a slit for ejecting ions towards the mass spectrometer; a set of DC voltage supplies (+V, −V, V1, V2) to provide discrete DC levels and a number of fast electronic switches (409) for connecting/disconnecting the DC supplies to at least two of the electrodes; a neutral gas filling the ion trap and a digital controller to provide a switching procedure of ion trapping, manipulation with ions, cooling and including a state at which all ions are ejected from the ion trap towards the mass spectrometer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.