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Title: Influence of an External AC Electric Field on Plasma Turbulence in the Tokamak Near-Wall Layer

Abstract

Braginskii reduced equations of two-fluid hydrodynamics are modified to take into account the presence of an external ac electric field localized in the tokamak near-wall layer. Numerical simulations show that, after reaching certain amplitude, such a field oscillating with the frequency ω ≈ ω{sub GAM} is capable of suppressing turbulent processes. The turbulence suppression mechanism consists in a sharp decrease in the growth rate of drift-resistive ballooning instability due to the appearance of additional nonlinear terms related to the external field in the equation for the vorticity.

Authors:
;  [1]
  1. National Research Center “Kurchatov Institute,” (Russian Federation)
Publication Date:
OSTI Identifier:
22763293
Resource Type:
Journal Article
Journal Name:
Plasma Physics Reports
Additional Journal Information:
Journal Volume: 44; Journal Issue: 3; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-780X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BALLOONING INSTABILITY; COMPUTERIZED SIMULATION; ELECTRIC FIELDS; HYDRODYNAMICS; LAYERS; NONLINEAR PROBLEMS; PLASMA; TOKAMAK DEVICES; TURBULENCE

Citation Formats

Shurygin, R. V., E-mail: regulxx@rambler.ru, and Melnikov, A. V.. Influence of an External AC Electric Field on Plasma Turbulence in the Tokamak Near-Wall Layer. United States: N. p., 2018. Web. doi:10.1134/S1063780X18030078.
Shurygin, R. V., E-mail: regulxx@rambler.ru, & Melnikov, A. V.. Influence of an External AC Electric Field on Plasma Turbulence in the Tokamak Near-Wall Layer. United States. doi:10.1134/S1063780X18030078.
Shurygin, R. V., E-mail: regulxx@rambler.ru, and Melnikov, A. V.. Thu . "Influence of an External AC Electric Field on Plasma Turbulence in the Tokamak Near-Wall Layer". United States. doi:10.1134/S1063780X18030078.
@article{osti_22763293,
title = {Influence of an External AC Electric Field on Plasma Turbulence in the Tokamak Near-Wall Layer},
author = {Shurygin, R. V., E-mail: regulxx@rambler.ru and Melnikov, A. V.},
abstractNote = {Braginskii reduced equations of two-fluid hydrodynamics are modified to take into account the presence of an external ac electric field localized in the tokamak near-wall layer. Numerical simulations show that, after reaching certain amplitude, such a field oscillating with the frequency ω ≈ ω{sub GAM} is capable of suppressing turbulent processes. The turbulence suppression mechanism consists in a sharp decrease in the growth rate of drift-resistive ballooning instability due to the appearance of additional nonlinear terms related to the external field in the equation for the vorticity.},
doi = {10.1134/S1063780X18030078},
journal = {Plasma Physics Reports},
issn = {1063-780X},
number = 3,
volume = 44,
place = {United States},
year = {2018},
month = {3}
}