Development of Discharge in a Saline Solution at Near-Threshold Voltages

Yu D. Korolev, I. A. Shemyakin, V. S. Kasyanov, V. G. Geyman, A. V. Bolotov, V. O. Nekhoroshev

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    Abstract

    The development of a discharge in a point−plane gap filled with a saline solution with a salt content of 3% was studied experimentally. The duration of the voltage pulse applied to the gap was about 2 ms. Data are presented on the formation dynamics of gas microcavities at near-threshold voltages at which gas-discharge plasma appears in some microcavities. The cavities are conglomerates of microbubbles with a typical size of ≈100 μm. At the threshold voltage (≈750 V), the active electrode is covered with a gas layer and the gap voltage is in fact applied to this layer, which leads to the development of discharges in individual microbubbles. In this case, the discharge operates in the form of short current pulses. The number of microcavities filled with plasma increases as the voltage grows above the threshold value. At the plasma boundary, new microbubbles are formed, in which discharges are ignited. As a result, the plasma front propagates from the active electrode into the gap with a characteristic velocity of 103 cm/s.

    Original languageEnglish
    Pages (from-to)581-587
    Number of pages7
    JournalPlasma Physics Reports
    Volume44
    Issue number6
    DOIs
    Publication statusPublished - 1 Jun 2018

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    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Physics and Astronomy (miscellaneous)

    Cite this

    Korolev, Y. D., Shemyakin, I. A., Kasyanov, V. S., Geyman, V. G., Bolotov, A. V., & Nekhoroshev, V. O. (2018). Development of Discharge in a Saline Solution at Near-Threshold Voltages. Plasma Physics Reports, 44(6), 581-587. https://doi.org/10.1134/S1063780X18060053