Patent · US Active

Collision cell multipole

US9099290B2 · kind B2 · utility

4Cited by

4References

12Claims

0Family size

Assignee

THERMO FISHER SCIENTIFIC (BREMEN) GMBH · DE

Inventors

Gerhard Jung · Delmenhorst, DE
Lothar Rottmann · Ganderkesee, DE

Key dates

Filing date	Dec 21, 2012
Grant date	Aug 4, 2015
Priority date	—
Expiry date	Dec 21, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH01J49/426
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Mass spectrometer collision/reaction cell multipole and method. The multipole may have first and second portions and an intermediate portion therebetween, the first and second portions operating at first and second q values lower than a third q value at the intermediate portion. A low-mass cut-off of the multipole may be controlled by varying a q value from a first to at least a second value. The multipole may have multipole electrodes disposed about a central axis and having a respective first portion, second portion, and intermediate portion therebetween which is radially closer to the central axis. This offers relatively high acceptance and ion transmission, while providing low-mass cut-off for removing undesired/interfering ions and helping reduce background count.

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