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JOURNALS // Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki // Archive

Pis'ma v Zh. Èksper. Teoret. Fiz., 2024 Volume 119, Issue 7, Pages 502–507 (Mi jetpl7191)

This article is cited in 1 paper

PLASMA, HYDRO- AND GAS DYNAMICS

On the saturation of the instability of induced ordinary microwave scattering in the edge transport barrier of a tokamak during electron cyclotron resonance heating of a plasma

E. Z. Gusakov, A. Yu. Popov

Ioffe Institute, St. Petersburg, 194021 Russia

Abstract: The saturation of the low-threshold parametric decay instability of an ordinary wave during electron cyclotron resonance heating in the edge transport barrier of a tokamak due to the stochastic damping of a daughter two-dimensionally localized oblique Langmuir wave has been considered. It has been found that the saturation of instability in modern devices occurs at a relatively low level and does not affect the energy balance during plasma heating. It has been shown that the efficiency of nonlinear pump under expected conditions of microwave power injection in the International Thermonuclear Experimental Reactor will exceed the maximum efficiency of stochastic damping, which will result in the breaking of amplitude-dependent saturation and can significantly modify the power deposition profile.

Received: 19.02.2024
Revised: 04.03.2024
Accepted: 07.03.2024

DOI: 10.31857/S123456782407005X


 English version:
Journal of Experimental and Theoretical Physics Letters, 2024, 119:7, 505–510


© Steklov Math. Inst. of RAS, 2025