Breakdown of a coaxial diode transverse to a uniform magnetic field

    Research output: Contribution to journalArticle

    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

    ASJC Scopus subject areas

    • Engineering(all)
    • Electrical and Electronic Engineering

    Fingerprint Dive into the research topics of 'Breakdown of a coaxial diode transverse to a uniform magnetic field'. Together they form a unique fingerprint.

  • Cite this