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Ion guide with orthogonal sampling

  • US 9,412,575 B2
  • Filed: 05/15/2015
  • Issued: 08/09/2016
  • Est. Priority Date: 03/14/2011
  • Status: Active Grant
First Claim
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1. A mass spectrometer comprising:

  • an RF ion guide comprising a plurality of electrodes wherein in a mode of operation ions are orthogonally sampled from said ion guide and wherein said ions are not axially trapped or otherwise axially confined within said RF ion guide;

    a device arranged and adapted to apply an AC or RF voltage to said electrodes in order to confine ions within said ion guide;

    a device arranged and adapted to apply a DC potential to at least some of said electrodes; and

    a control system, wherein said control system is arranged and adapted to switch said ion guide to operate in a mode of operation wherein said DC potential is applied in order to cause ions to be orthogonally sampled from a portion of said ion guide.

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