Theoretical simulation of the picosecond runaway-electron beam in coaxial diode filled with SF6 at atmospheric pressure

Andrey Kozyrev, Vasily Kozhevnikov, Mikhail Lomaev, Dmitry Sorokin, Natalia Semeniuk, Victor Tarasenko

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

This paper presents detailed results of gas discharge theoretical simulation and the explanation of probabilistic mechanism of fast-electrons generation. Within the framework of a hybrid mathematical model, the hydrodynamic and the kinetic approaches are used simultaneously in order to describe the dynamics of different components of a low-temperature discharge plasma. The breakdown of a coaxial diode occurs in the form of a dense plasma region expanding from the cathode. On this background there is a formation of runaway electrons that are initiated by the ensemble of plasma electrons generated in the region of locally enhanced electric field within the front of the dense plasma. It is shown that the power spectrum of fast electrons in the discharge contains the group of electrons with the so-called "anomalous" energies. Comparison of the calculation results with the existent experimental data gives a good agreement for all major process parameters.

Original languageEnglish
Article number45001
JournalEPL
Volume114
Issue number4
DOIs
Publication statusPublished - 1 May 2016

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atmospheric pressure
diodes
dense plasmas
electron beams
electrons
simulation
gas discharges
electron plasma
plasma jets
power spectra
mathematical models
breakdown
cathodes
hydrodynamics
electric fields
kinetics
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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Theoretical simulation of the picosecond runaway-electron beam in coaxial diode filled with SF6 at atmospheric pressure. / Kozyrev, Andrey; Kozhevnikov, Vasily; Lomaev, Mikhail; Sorokin, Dmitry; Semeniuk, Natalia; Tarasenko, Victor.

In: EPL, Vol. 114, No. 4, 45001, 01.05.2016.

Research output: Contribution to journalArticle

Kozyrev, Andrey ; Kozhevnikov, Vasily ; Lomaev, Mikhail ; Sorokin, Dmitry ; Semeniuk, Natalia ; Tarasenko, Victor. / Theoretical simulation of the picosecond runaway-electron beam in coaxial diode filled with SF6 at atmospheric pressure. In: EPL. 2016 ; Vol. 114, No. 4.
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