Soft collisions in relativistic runaway electron avalanches

Sebastien Celestin, Victor P. Pasko

    Research output: Contribution to journalArticle

    28 Scopus citations

    Abstract

    This paper reports the first application of the relativistic binary-encounter-Bethe (RBEB) electron impact ionization model for studies of relativistic runaway electron avalanches (RREA) phenomenon at different pressures in air, which is believed to be the root cause of the hard x-rays and terrestrial gamma-ray flashes observed in the Earth's atmosphere in association with lightning activity. The model allows robust and accurate description of ionization over a wide range of energies (from the ionization threshold to megaelectronvolts), that is especially important for studies of thermal runaway electrons. A direct comparison between RREA rates obtained using classic Møller and the new RBEB differential ionization cross sections demonstrates that the dipole interaction between primary electrons and K-shell electrons of oxygen and nitrogen has an impact on the rates for relatively low applied electric fields comparable to or higher than 20 kV cm-1 at ground pressure. Implications of non-similarity of the runaway process developing at different altitudes due to the Swann-Fermi density effect are discussed.

    Original languageEnglish (US)
    Article number315206
    JournalJournal of Physics D: Applied Physics
    Volume43
    Issue number31
    DOIs
    StatePublished - Aug 11 2010

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Acoustics and Ultrasonics
    • Surfaces, Coatings and Films

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