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1. (WO2017194974) ION GUIDE

Pub. No.:    WO/2017/194974    International Application No.:    PCT/GB2017/051348
Publication Date: Fri Nov 17 00:59:59 CET 2017 International Filing Date: Tue May 16 01:59:59 CEST 2017
IPC: H01J 49/06
Applicants: MICROMASS UK LIMITED
Inventors: SLATER, Stephen Patrick
IVESON, John
MALPAS, Oliver John
CHANDE, Bharat
GORDON, David
Title: ION GUIDE
Abstract:
Disclosed herein is an ion guide comprising a plurality of axially stacked plates, wherein at least some or all of said plates comprise: a first electrically conductive portion; and a second electrically conductive portion, wherein the second electrically conductive portion is electrically isolated from the first electrically conductive portion, the first and second electrically conductive portions being shaped and arranged relative to each other so as to define an opening through which ions are axially transmitted in use; wherein, in use, a first AC or RF voltage is applied to the first electrically conductive portion and a second AC or RF voltage is applied to the second electrically conductive portion in order to confine ions radially within said opening. The first and second electrically conductive portions (1, 2) may be separately formed and interleaved within the ion guide to define the plates. Alternatively the first (41, 43) and second (42, 44) electrically conductive portions may be printed onto a common substrate (4).