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Numerical Study of the Feasibility of Runaway Electron Generation in an Emerging Cathode Layer of a Self-Sustained High-Pressure Space Discharge

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Abstract

The formation of the cathode layer of a self-sustained high-pressure space discharge with preliminary ionization of a gas medium, excited by nano- and subnanosecond voltage pulses, is calculated. It is shown that, at pressures of ~1 atm, at the final stage of cathode layer formation, conditions for runaway electron generation are created. Runaway electrons from the electric field amplification region in front of the leading edge of a plasma (streamer) channel, originating from the top of the cathode micronib, is considered. It is shown that, at pressures of ~10 atm, conditions are created for the runaway of electrons immediately after their emission from the top of the micronib in its amplification zone; the runaway electrons thus obtained, in turn, can create preliminary ionization of the gas medium and ensure the formation of the initial phase of space discharge in systems without illumination.

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Authors and Affiliations

  1. Institute of Electrophysics, Russian Academy of Sciences, Ural Branch, 620016, Yekaterinburg, Russia

    V. V. Lisenkov

  2. Ural Federal University Named after the First President of Russia B.N. Yeltsin, 620083, Yekaterinburg, Russia

    V. V. Lisenkov

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  1. V. V. Lisenkov
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Correspondence to V. V. Lisenkov.

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Translated by E. Chernokozhin

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Lisenkov, V.V. Numerical Study of the Feasibility of Runaway Electron Generation in an Emerging Cathode Layer of a Self-Sustained High-Pressure Space Discharge. Tech. Phys. 65, 710–714 (2020). https://doi.org/10.1134/S106378422005014X

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