A simulation study of the planar electrostatic ion trap mass analyzer

Li Ding, Ranjan Badheka, Zhengtao Ding, Hiroaki Nakanishi

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The Planar electrostatic ion trap expands the trapping space of the linear electrostatic ion trap, giving rise to higher tolerance to space charge. A rotational symmetrical design was made, which has a trapping field between two layers of concentric circular electrodes, and the ions are trapped to oscillate around the center plane between the electrodes. The oscillatory motions of the ions were simulated and the field distribution was optimized to achieve isochronous motion against energy spread in R, z, and φ directions. The image charge signal can be picked up by more than one circular electrode and using FFT the mass resolution for the optimized trap can reach 80,000 FWHM. While Fourier transform of the image charge signal generates many high harmonic peaks, the unwanted harmonic peaks can be eliminated by linear combination of image charge signals from multiple pick-up electrodes to give satisfactory results. © 2013 American Society for Mass Spectrometry.
    Original languageEnglish
    Pages (from-to)356-364
    Number of pages8
    JournalJournal of the American Society for Mass Spectrometry
    Volume24
    Issue number3
    DOIs
    Publication statusPublished - Mar 2013

    Keywords

    • Electrostatic ion trap
    • Fourier transform
    • High resolution
    • Mass analyzer
    • Simulation

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