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    Field ionization detectors: a comparative model

    Access Status
    Fulltext not available
    Authors
    O'Donnell, Kane
    Fahy, A.
    Thomsen, L.
    O'Connor, D.
    Dastoor, P.
    Date
    2011
    Type
    Journal Article
    
    Metadata
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    Citation
    O'Donnell, K. and Fahy, A. and Thomsen, L. and O'Connor, D. and Dastoor, P. 2011. Field ionization detectors: a comparative model. Measurement Science and Technology. 22 (1): Article ID 015901.
    Source Title
    Measurement Science and Technology
    DOI
    10.1088/0957-0233/22/1/015901
    ISSN
    0957-0233
    School
    Department of Imaging and Applied Physics
    URI
    http://hdl.handle.net/20.500.11937/24842
    Collection
    • Curtin Research Publications
    Abstract

    Recently there has been renewed interest in using field ionization as a method of detecting neutral atomic/molecular species. However, the current–voltage characteristic of a field ionization detector is very difficult to calculate from first principles, making comparison, characterization and monitoring difficult. Here we present a semi-empirical theory designed for macroscopic characterization and comparison of field ionization devices via the current–voltage curve in a similar fashion to the familiar Fowler–Nordheim analysis for field emission devices. The resulting model allows us to monitor the changes in a single field ionization detector, or, more importantly, to make quantitative comparisons between detectors. We demonstrate that this new model accurately reproduces the characteristic field ionization current versus voltage profiles in both low and high field regimes.

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