Ion trap and a method for dissociating ions in an ion trap
US7755034B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 23, 2005 |
| Grant date | Jul 13, 2010 |
| Priority date | — |
| Expiry date | Jan 5, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/0054
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A quadrupole ion trap includes a switch 3 for switching a trapping voltage between discrete voltage levels VH, VL. This creates a digital trapping field for trapping precursor ions and product ions in a trapping region of the ion trap. A gating voltage is applied to a gate electrode 12 to control injection of source electrons into the ion trap. Application of the gating voltage is synchronised with the switching so that electrons are injected into the trapping region while the trapping voltage is at a selected one of the voltage levels and can reach the trapping region with a kinetic energy suitable for electron capture dissociation to take place.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.