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RF power supply for a mass spectrometer

  • US 9,472,385 B2
  • Filed: 04/02/2015
  • Issued: 10/18/2016
  • Est. Priority Date: 06/21/2004
  • Status: Active Grant
First Claim
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1. A method of operating a mass spectrometer, comprising:

  • introducing a group of ions into an ion injector along a first axis, the ion injector including a plurality of electrodes;

    shutting off an RF potential applied to a first set of electrodes of the plurality of electrodes;

    applying a DC offset to a second set of electrodes of the plurality of electrodes to generate an electric field causing the group of ions to be ejected from the ion injector along a second axis substantially orthogonal to the first axis; and

    directing the group of ions ejected from the ion injector to a pulsed mass analyzer;

    wherein the DC offset has a rise time shorter than a period over which all ions of the group of ions are ejected from the ion injector.

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