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

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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 ≈ ωGAM 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.

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Authors and Affiliations

  1. National Research Center “Kurchatov Institute,”, Moscow, 123098, Russia

    R. V. Shurygin & A. V. Melnikov

  2. National Research Nuclear University “MEPhI,”, Moscow, 115409, Russia

    A. V. Melnikov

Authors
  1. R. V. Shurygin
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  2. A. V. Melnikov
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Correspondence to R. V. Shurygin.

Additional information

Original Russian Text © R.V. Shurygin, A.V. Melnikov, 2018, published in Fizika Plazmy, 2018, Vol. 44, No. 3, pp. 263–272.

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Shurygin, R.V., Melnikov, A.V. Influence of an External AC Electric Field on Plasma Turbulence in the Tokamak Near-Wall Layer. Plasma Phys. Rep. 44, 303–311 (2018). https://doi.org/10.1134/S1063780X18030078

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  • DOI: https://doi.org/10.1134/S1063780X18030078

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