Patent · US Active

Method for operating three-dimensional RF ion traps with high ion capture efficiency

US8164056B2 · kind B2 · utility

3Cited by

10References

5Claims

0Family size

Assignee

Bruker Daltonik GmbH · DE

Inventors

Melvin Andrew Park · Billerica, US
Michael Schubert · Parkton, US
Jochen Franzen · Bremen, DE

Key dates

Filing date	Aug 11, 2010
Grant date	Apr 24, 2012
Priority date	—
Expiry date	Oct 21, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH01J49/424
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In a three-dimensional Paul RF ion trap the ring electrode and end cap electrodes are formed from pairs of pole rods. This multipole rod system is then operated as a linear ion trap with a constant field distribution along the multipole rod system. While the system is operating as a linear ion trap, analyte ions are introduced and stored within the linear ion trap. After the ions have been stored, a single-phase RF voltage is supplied to all rods of a middle segment thus forming a three-dimensional ion trap, thereby collecting the ions in a spherical cloud within this middle segment. The collected analyte ions can then be reacted in the three-dimensional ion trap and the product ions resulting from the reactions can be ejected for mass analysis.

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