Breakdown of a coaxial diode transverse to a uniform magnetic field

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    2 Citations (Scopus)

    Abstract

    The breakdown of a coaxial diode transverse to a uniform magnetic field is an obstacle for the use of these devices for the microsecond range of pulse durations. A model of the breakdown was developed [1, 2] that takes into account the evolution of cathode plasma from isolated emission sites into a closed plasma layer around the cathode in which a centrifugal instability subsequently develops. In the paper experimental results of checking of the model are reported. Investigated were dependencies of the diode commutation time tcom⊥ on the voltage U, beam current I, cathode radius rc and a plasma behavior in the electrode systems with some sections of a negative radius of curvature of an electric-field equipotential line. It was shown that the model [1, 2] agrees with the experimental data if a condition neffd f(d) (where neff is the effective plasma concentration, d is the gap spacing) is satisfied. A possibility of lengthening of a pulse duration in coaxial diodes is discussed. An experimental set-up is presented that allows the time tcom⊥ to be increased by an order of magnitude.

    Original languageEnglish
    Pages (from-to)234-237
    Number of pages4
    JournalIEEE Transactions on Electrical Insulation
    VolumeEI-18
    Issue number3
    DOIs
    Publication statusPublished - 1 Jan 1983

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    Diodes
    Magnetic fields
    Plasmas
    Cathodes
    Electric commutation
    Electric fields
    Electrodes
    Electric potential

    ASJC Scopus subject areas

    • Engineering(all)
    • Electrical and Electronic Engineering

    Cite this

    Breakdown of a coaxial diode transverse to a uniform magnetic field. / Bougaev, S. P.; Kim, A. A.; Koshelev, Vladimir Ilyich; Khryapov, Petr Alexandrovich.

    In: IEEE Transactions on Electrical Insulation, Vol. EI-18, No. 3, 01.01.1983, p. 234-237.

    Research output: Contribution to journalArticle

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