Patent · US Active

Ejection of ion clouds from 3D RF ion traps

US8901491B2 · kind B2 · utility

5Cited by

15References

19Claims

0Family size

Assignee

Bruker Daltonik GmbH · DE

Inventors

Andreas Brekenfeld · Bremen, DE
Christoph Gebhardt · Bremen, DE
Ralf Hartmer · Hamburg, DE

Key dates

Filing date	Jun 26, 2013
Grant date	Dec 2, 2014
Priority date	—
Expiry date	Jun 26, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH01J49/425
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention proposes a method for the collective ejection of ions from a 3D RF ion trap with a ring electrode and two end cap electrodes, which comprises the following steps: (a) the RF voltage of a high-quality resonant circuit applied to the ring electrode is replaced with a second RF voltage at the two end cap electrodes which can be changed or switched faster than the high voltage at the ring electrode, keeping the ions stored, (b) the second RF voltage at the end cap electrodes is then switched down or off abruptly, releasing the ions, and (c) the released ions are ejected through an opening in one of the end cap electrodes by switching on a DC voltage on at least one of the end cap electrodes.

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