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On an Unconventional Approach to the Improvement of Plasma Confinement in Tokamaks

  • PLASMA, HYDRO- AND GAS DYNAMICS
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A conceptual proposal has been suggested to improve the confinement of a turbulent plasma in tokamaks with the use of discharges with large safety factors qL at the plasma edge. A number of experiments that were performed with increased safety factors qL at tokamaks of different scales and indicated the improvement of the confinement of the plasma in such regimes have been analyzed. The computer simulation of the evolution of the turbulent plasma, including the transition from the ohmic stage to the stage of intense heating by the electron cyclotron resonance method, has been performed for three discharges with the plasma parameters characteristic of the Т-10 tokamak and qL from 3 to 8.5. This simulation has confirmed that the confinement of the plasma can be improved and its parameters can be increased at large qL values.

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ACKNOWLEDGMENTS

This work has been carried out using computing resources of the federal collective usage center Complex for Simulation and Data Processing for Mega-science Facilities at NRC “Kurchatov Institute,” http://ckp.nrcki.ru/. We are grateful to V.V. Yankov for useful discussions, as well as to N.A. Kirneva and N.V. Kasyanova for providing data on T-10 experiments.

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  1. National Research Center Kurchatov Institute, 123182, Moscow, Russia

    V. P. Pastukhov & D. V. Smirnov

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  1. V. P. Pastukhov
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  2. D. V. Smirnov
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Correspondence to V. P. Pastukhov.

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Translated by R. Tyapaev

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Pastukhov, V.P., Smirnov, D.V. On an Unconventional Approach to the Improvement of Plasma Confinement in Tokamaks. Jetp Lett. 114, 208–214 (2021). https://doi.org/10.1134/S0021364021160086

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  • DOI: https://doi.org/10.1134/S0021364021160086

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