Fundamental Investigations of the Quadrupole Ion Storage trap Operating in Novel Modes

  • Peter Heesterman

    Student thesis: Doctoral Thesis


    The Quadrupole Ion Store (Quistor) is a device which traps charged particles in an electric field composed only of radio - frequency (RF) and DC voltage components. The Quistor therefore operates on very similar principles to the Quadrupole Mass Filter, but has not been developed to the same extent.

    This thesis presents a novel approach to the construction, operation and use of a Quistor as a mass spectrometer. It is felt that the method used offers significant advantages over other methods employed in previous work.

    The research undertaken includes a substantial amount of computer simulation work which has been used to predict in detail the performance of the Quistor and thus the benefit, if any, of modifications in its design. Naturally this is closely linked to experimental verification of predicted improvements in the quality of spectra obtained.

    In addition to its use as a simple mass spectrometer, the Quistor can be operated so as to produce Chemical Ionisation spectra, and can also perform multiple stages of mass analysis so as to monitor ion reactions. These capabilities, however, have yet to be developed upon this system.

    It is intended that a Quistor system based on this work will enter commercial production in the near future.
    Date of AwardApr 1990
    Original languageEnglish
    Awarding Institution
    • Polytechnic of Wales

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