Patent ID: 8362424
Filing Date: 2013-01-29
Classification: H01J

Abstract:
1. An Electron Transfer Dissociation or Proton Transfer Reaction device comprising: an ion guide comprising a plurality of electrodes each having at least one aperture, wherein ions are transmitted in use through said apertures; and a first device arranged and adapted to apply one or more first transient DC voltages or potentials or one or more first transient DC voltage or potential waveforms to at least some of said plurality of electrodes in order to drive or urge at least some first ions along or through at least a portion of the axial length of said ion guide in a first direction; wherein said first ions are caused to react with: (i) second ions already present within said ion guide; or (ii) second ions which are subsequently added to or provided into said ion guide; and wherein said first device is arranged and adapted to apply one or more second transient DC voltages or potentials or one or more second transient DC voltage or potential waveforms to at least some of said plurality of electrodes in order to drive or urge at least some second ions along or through at least a portion of the axial length of said ion guide in a second direction wherein said second direction is either substantially the same or substantially different to said first direction.