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1. (WO2018037240) CONTROLLING ION TEMPERATURE IN AN ION GUIDE

Pub. No.:    WO/2018/037240    International Application No.:    PCT/GB2017/052504
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Sat Aug 26 01:59:59 CEST 2017
IPC: H01J 49/06
H01J 49/00
Applicants: MICROMASS UK LIMITED
Inventors: GREEN, Martin Raymond
GILES, Kevin
LANGRIDGE, David John
Title: CONTROLLING ION TEMPERATURE IN AN ION GUIDE
Abstract:
There is provided a method of guiding ions, comprising providing an ion guide comprising a plurality of electrodes, confining ions radially within said ion guide by applying one or more voltages to said plurality of electrodes, applying an orthogonal DC field along at least a portion of said ion guide in order to control the temperature of ions as they travel through said ion guide, and applying an electrostatic driving potential to said plurality of electrodes to urge ions along the axial length of the ion guide, wherein said electrostatic driving potential is applied in the form of a DC travelling wave potential or other transient DC potential.