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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2010, Volume 91, Issue 12, Pages 724–728
(Mi jetpl748)
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This article is cited in 30 scientific papers (total in 30 papers)
PLASMA, GASES
Low-threshold parametric decay instabilities in the experiments on the electron cyclotron resonance heating in tokamaks and stellarators
E. Z. Gusakov, A. Yu. Popov Ioffe Physico-Technical Institute, Russian Academy of Sciences
Abstract:
The experimental conditions have been analyzed for a significant reduction of the threshold of the reflective parametric decay instabilities under electron cyclotron resonance heating (ECRH) of a plasma in magnetic devices in the absence of the upper hybrid resonance for the pump wave. The role of the nonmonotonic profile of the plasma density near the O point of the magnetic island, which allows for the localization of ion Bernstein waves in the direction of the density gradient and the suppression of convective losses from the decay region has been discussed. It has been shown that the threshold of the instability of the induced backscattering near the local maximum of the density profile is decreased by four orders of magnitude and is easily exceeded in present-day ECRH experiments at a power of several hundred kilowatts.
Received: 05.05.2010
Citation:
E. Z. Gusakov, A. Yu. Popov, “Low-threshold parametric decay instabilities in the experiments on the electron cyclotron resonance heating in tokamaks and stellarators”, Pis'ma v Zh. Èksper. Teoret. Fiz., 91:12 (2010), 724–728; JETP Letters, 91:12 (2010), 655–659
Linking options:
https://www.mathnet.ru/eng/jetpl748 https://www.mathnet.ru/eng/jetpl/v91/i12/p724
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Abstract page: | 267 | Full-text PDF : | 105 | References: | 36 |
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