Pulse discharges in gases under conditions of strong ionization by electrons

Yu I. Bychkov, Yu D. Korolev, Gennadii A. Mesyats

    Research output: Contribution to journalArticle

    21 Citations (Scopus)

    Abstract

    A review is given of investigations of pulsed high-pressure volume discharges excited by fast-electron beams. The following topics are discussed: classification of discharges; methods for calculating the current-voltage characteristics; analysis of the optimal ways of depositing energy in the gas in the volume stage of the discharge; discharge instability mechanisms and the corresponding experimental observations; applications of discharges. The results are given of calculations of the electric field in the cathode and anode regions, and also in the discharge column in the case of a spatially inhomogeneous ionication of the gap. It is shown that a stable volume flow of the current in molecular gases in which the specific deposited energy is 0.1–1 J/cm3 may be attained in a nonself-sustaining discharge and in a discharge with ionization multiplication. In both cases a spark channel appears in two stages: formation of sparkinitiating centers in the form of plasma regions with a higher density near the electrodes is followed by growth of the spark channel from such initiating centers. In some cases the spark channel growth can be described by the available mathematical models. Discharges in mixtures of rare gases with halogencontaining compounds, when electrons are lost mainly by capture by complex molecules, are considered separately. Applications of volume discharges in laser pumping, switching of pulsed currents, plasma chemistry, etc., are described.

    Original languageEnglish
    Pages (from-to)944-958
    Number of pages15
    JournalSoviet Physics - Uspekhi
    Volume21
    Issue number11
    DOIs
    Publication statusPublished - 30 Nov 1978

    Fingerprint

    ionization
    pulses
    gases
    electrons
    sparks
    plasma chemistry
    laser pumping
    sustaining
    molecular gases
    multiplication
    intermetallics
    rare gases
    mathematical models
    anodes
    cathodes
    electron beams
    electrodes
    electric fields
    energy
    electric potential

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Pulse discharges in gases under conditions of strong ionization by electrons. / Bychkov, Yu I.; Korolev, Yu D.; Mesyats, Gennadii A.

    In: Soviet Physics - Uspekhi, Vol. 21, No. 11, 30.11.1978, p. 944-958.

    Research output: Contribution to journalArticle

    Bychkov, Yu I. ; Korolev, Yu D. ; Mesyats, Gennadii A. / Pulse discharges in gases under conditions of strong ionization by electrons. In: Soviet Physics - Uspekhi. 1978 ; Vol. 21, No. 11. pp. 944-958.
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