Patent · US Active

Asymmetric field ion mobility in a linear geometry ion trap

US8975578B2 · kind B2 · utility

15Cited by

6References

17Claims

0Family size

Assignee

Micromass UK Limited · GB

Inventors

Martin Raymond Green · Grafton, GB
Kevin Giles · Altrincham, GB
David J. Langridge · Manchester, GB

Key dates

Filing date	Oct 26, 2011
Grant date	Mar 10, 2015
Priority date	—
Expiry date	Oct 26, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH01J49/422
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A linear ion trap is disclosed wherein an asymmetric voltage waveform is applied to electrodes forming the ion trap which causes ions to become radially separated according to their differential ion mobility. An axial potential barrier is arranged at the exit of the ion trap such that ions having a first differential ion mobility and a first radial displacement are retained axially within the ion trap but ions having a second differential ion mobility and a second radial displacement are ejected axially from the ion trap.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.