A Physical Model of the Low-Current-Density Vacuum Arc

Alexander Bolotov, Andrey Kozyrev, Yury Korolev

    Research output: Contribution to journalArticle

    37 Citations (Scopus)

    Abstract

    A one-dimensional (1-D) physical model of the low-current-density steady-state vacuum arc is proposed. The model is based on the continuity equations for ions and electrons and the energy balance for the discharge system; the electric potential distribution in the discharge gap is assumed to be nonmonotonic. It is supposed that the ion current at the cathode is generated within the cathode potential fall region due to the ionization of the evaporated atoms by the plasma thermal electrons having Boltzmann's energy distribution. The model offers a satisfactory explanation for the principal regularities of a hot-cathode vacuum arc with diffuse attachment of the current. The applicability of the model proposed to the explanation of some processes occurring in a vacuum arc, such as the flow of fast ions toward the anode, the current cutoffs and voltage bursts, and the backward motion of a cathode spot in a transverse magnetic field is discussed.

    Original languageEnglish
    Pages (from-to)884-892
    Number of pages9
    JournalIEEE Transactions on Plasma Science
    Volume23
    Issue number6
    DOIs
    Publication statusPublished - 1 Jan 1995

    Fingerprint

    low currents
    arcs
    current density
    vacuum
    cathodes
    hot cathodes
    thermal plasmas
    continuity equation
    electric potential
    regularity
    ion currents
    attachment
    bursts
    energy distribution
    ions
    anodes
    electrons
    cut-off
    ionization
    magnetic fields

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics
    • Condensed Matter Physics

    Cite this

    A Physical Model of the Low-Current-Density Vacuum Arc. / Bolotov, Alexander; Kozyrev, Andrey; Korolev, Yury.

    In: IEEE Transactions on Plasma Science, Vol. 23, No. 6, 01.01.1995, p. 884-892.

    Research output: Contribution to journalArticle

    Bolotov, Alexander ; Kozyrev, Andrey ; Korolev, Yury. / A Physical Model of the Low-Current-Density Vacuum Arc. In: IEEE Transactions on Plasma Science. 1995 ; Vol. 23, No. 6. pp. 884-892.
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