High-current stages in a low-pressure glow discharge with hollow cathode

Yury D. Korolev, Oleg B. Frants, Nikolay V. Landl, Ilja A. Shemyakin, Vladimir G. Geyman

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    Abstract

    This paper presents an interpretation of the dense and superdense glow discharge stages in pseudospark switch geometry. The discharge is treated as a self-organizing system that is able to rearrange itself to provide the current requested by external electric circuit. The principal discharge regions in the glow stages are the hollow-cathode plasma, the positive column plasma, and the double electric layer that separates these plasma regions. A model that allows some quantitative estimates when applied to the hollow-cathode plasma is developed, in which a generalized secondary emission coefficient that considers an external emission current is introduced. The abrupt transition from dense glow stage to superdense glow stage occurs because of microexplosions at the cathode surface and appearing the metal vapor plasma. In terms of the model, this means an abrupt increase in the secondary emission coefficient. The comparison with the experiment is made for discharges in hydrogen and xenon at a current up to several kiloamperes and at a current rise time from several microseconds to hundreds of nanoseconds. The physical reasons for the current quenching effect that manifests itself at a decreased gas pressure are also discussed.

    Original languageEnglish
    Article number6544679
    Pages (from-to)2087-2096
    Number of pages10
    JournalIEEE Transactions on Plasma Science
    Volume41
    Issue number8
    DOIs
    Publication statusPublished - 2013

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    Keywords

    • Dense glow discharge
    • hollow-cathode discharge
    • pseudospark switches
    • superdense glow discharge

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Nuclear and High Energy Physics

    Cite this

    Korolev, Y. D., Frants, O. B., Landl, N. V., Shemyakin, I. A., & Geyman, V. G. (2013). High-current stages in a low-pressure glow discharge with hollow cathode. IEEE Transactions on Plasma Science, 41(8), 2087-2096. [6544679]. https://doi.org/10.1109/TPS.2013.2266675