Quadrupole ion trap with switchable multipole fractions

USRE36906E · kind E · reissue

Assignee

• Bruker Daltonik GmbH · DE

Inventors

• Jochen Franzen · Bremen, DE
• Yang Wang · Suzhou, CN

Key dates

• Filing date: Nov 20, 1997
• Grant date: Oct 10, 2000
• Expiry date: Nov 20, 2017

Classification

• Technology area (CPC —): General

Abstract

An ion trap is provided in which higher multipole field fractions can be switched on and off and, in addition, can be electrically tuned. Specifically, the electrodes of an ideally shaped ion trap are divided into rotationally symmetrical component electrodes positioned facing the interior of the ion trap on a hyperboloidal surface with rotationally symmetry.