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Title: Particle-in-cell simulation of multipactor discharge on a dielectric in a parallel-plate waveguide

Abstract

An original 2D3V (two-dimensional in coordinate space and three-dimensional in velocity space) particle-in-cell code has been developed for simulation of multipactor discharge on a dielectric in a parallelplate metal waveguide with allowance for secondary electron emission (SEE) from the dielectric surface and waveguide walls, finite temperature of secondary electrons, electron space charge, and elastic and inelastic scattering of electrons from the dielectric and metal surfaces. The code allows one to simulate all stages of the multipactor discharge, from the onset of the electron avalanche to saturation. It is shown that the threshold for the excitation of a single-surface multipactor on a dielectric placed in a low-profile waveguide with absorbing walls increases as compared to that in the case of an unbounded dielectric surface due to escape of electrons onto the waveguide walls. It is found that, depending on the microwave field amplitude and the SEE characteristics of the waveguide walls, the multipactor may operate in two modes. In the first mode, which takes place at relatively low microwave amplitudes, a single-surface multipactor develops only on the dielectric, the surface of which acquires a positively potential with respect to the waveguide walls. In the second mode, which occurs at sufficiently highmore » microwave intensities, a single-surface multipactor on the dielectric and a two-surface multipactor between the waveguide walls operate simultaneously. In this case, both the dielectric surface and the interwall space acquire a negative potential. It is shown that electron scattering from the dielectric surface and waveguide walls results in the appearance of high-energy tails in the electron distribution function.« less

Authors:
; ;  [1]
  1. Russian Academy of Sciences, Prokhorov General Physics Institute (Russian Federation)
Publication Date:
OSTI Identifier:
22614114
Resource Type:
Journal Article
Resource Relation:
Journal Name: Plasma Physics Reports; Journal Volume: 42; Journal Issue: 6; Other Information: Copyright (c) 2016 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COORDINATES; DIELECTRIC MATERIALS; DISTRIBUTION FUNCTIONS; ELECTRON EMISSION; ELECTRONS; EXCITATION; INELASTIC SCATTERING; METALS; MICROWAVE RADIATION; PLASMA SIMULATION; SPACE CHARGE; SURFACES; THREE-DIMENSIONAL CALCULATIONS; TWO-DIMENSIONAL CALCULATIONS; WALLS; WAVEGUIDES

Citation Formats

Sakharov, A. S., E-mail: sakharov-as@mail.ru, Ivanov, V. A., and Konyzhev, M. E.. Particle-in-cell simulation of multipactor discharge on a dielectric in a parallel-plate waveguide. United States: N. p., 2016. Web. doi:10.1134/S1063780X16060064.
Sakharov, A. S., E-mail: sakharov-as@mail.ru, Ivanov, V. A., & Konyzhev, M. E.. Particle-in-cell simulation of multipactor discharge on a dielectric in a parallel-plate waveguide. United States. doi:10.1134/S1063780X16060064.
Sakharov, A. S., E-mail: sakharov-as@mail.ru, Ivanov, V. A., and Konyzhev, M. E.. Wed . "Particle-in-cell simulation of multipactor discharge on a dielectric in a parallel-plate waveguide". United States. doi:10.1134/S1063780X16060064.
@article{osti_22614114,
title = {Particle-in-cell simulation of multipactor discharge on a dielectric in a parallel-plate waveguide},
author = {Sakharov, A. S., E-mail: sakharov-as@mail.ru and Ivanov, V. A. and Konyzhev, M. E.},
abstractNote = {An original 2D3V (two-dimensional in coordinate space and three-dimensional in velocity space) particle-in-cell code has been developed for simulation of multipactor discharge on a dielectric in a parallelplate metal waveguide with allowance for secondary electron emission (SEE) from the dielectric surface and waveguide walls, finite temperature of secondary electrons, electron space charge, and elastic and inelastic scattering of electrons from the dielectric and metal surfaces. The code allows one to simulate all stages of the multipactor discharge, from the onset of the electron avalanche to saturation. It is shown that the threshold for the excitation of a single-surface multipactor on a dielectric placed in a low-profile waveguide with absorbing walls increases as compared to that in the case of an unbounded dielectric surface due to escape of electrons onto the waveguide walls. It is found that, depending on the microwave field amplitude and the SEE characteristics of the waveguide walls, the multipactor may operate in two modes. In the first mode, which takes place at relatively low microwave amplitudes, a single-surface multipactor develops only on the dielectric, the surface of which acquires a positively potential with respect to the waveguide walls. In the second mode, which occurs at sufficiently high microwave intensities, a single-surface multipactor on the dielectric and a two-surface multipactor between the waveguide walls operate simultaneously. In this case, both the dielectric surface and the interwall space acquire a negative potential. It is shown that electron scattering from the dielectric surface and waveguide walls results in the appearance of high-energy tails in the electron distribution function.},
doi = {10.1134/S1063780X16060064},
journal = {Plasma Physics Reports},
number = 6,
volume = 42,
place = {United States},
year = {Wed Jun 15 00:00:00 EDT 2016},
month = {Wed Jun 15 00:00:00 EDT 2016}
}