The possibility of the localization of longitudinal waves in the intermediate frequency range in the edge transport barrier of a toroidal nuclear fusion facility is discovered. It is shown that such localized waves can be excited at the parametric decay of sub-megawatt ordinary microwave beams in experiments on electron cyclotron resonance heating of a plasma, which leads to the generation of anomalously scattered waves.
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This work was supported by the Ministry of Science and Higher Education of the Russian Federation (state contract no. 0040-2019-0023, theoretical analysis of parametric decay instabilities, and state contract no. 0034-2021-0003, numerical simulation).
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Gusakov, E.Z., Popov, A.Y. Low-Threshold Parametric Excitation of Electron Plasma Waves Localized in the Edge Transport Barrier of a Tokamak during Electron Cyclotron Resonance Heating of a Plasma. Jetp Lett. 114, 138–142 (2021). https://doi.org/10.1134/S0021364021150042
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DOI: https://doi.org/10.1134/S0021364021150042