Micromass UK Limited

John Iveson

Oliver John Malpas

Bharat Chande

David Gordon

Arthur Blake

Andrew Pawson

Edward Scott

Emma Marsden-Edwards

James Paul Harrison

Stephen Patrick Slater

Matthew Collier

Mass spectrometer

An ion guide is disclosed that comprises a plurality of electrodes arranged to form a multipole ion guide and one or more rigid support members. The plurality of electrodes comprises one or more groups of electrodes, and each group of electrodes comprises plural electrodes that are axially spaced apart from one another. The electrodes of one or more groups of electrodes are attached to one of the one or more rigid support members. One or more of the electrodes comprises a curved metal sheet, plate or strip.

Ion guide

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 () may be separately formed and interleaved within the ion guide to define the plates. Alternatively the first () and second () electrically conductive portions may be printed onto a common substrate ().

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Manchester, United Kingdom

John Iveson