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Modeling of the feedback stabilization of the resistive wall modes in a tokamak

Modeling of the feedback stabilization of the resistive wall modes in a tokamak,10.1134/1.1825126,Plasma Physics Reports,S. Yu. Medvedev,V. D. Pustovi

Modeling of the feedback stabilization of the resistive wall modes in a tokamak   (Citations: 1)
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The problem of feedback stabilization of the resistive wall modes (RWMs) in a tokamak is discussed. An equilibrium configuration with the parameters accepted for the stationary ITER scenario 4A is considered as the main scenario. The effect of the vacuum chamber's shape on the plasma stability is studied. Ideal MHD stability is analyzed numerically by using the KINX code. It is shown that, in a tokamak with the parameters of the designed T-15M tokamak, RWMs can be stabilized by a conventional stabilizing system made of framelike coils. However, the maximum possible gain in β in such a tokamak is found to be smaller than that in ITER. It is shown that, in this case, a reduction in the plasma—wall gap width by 10 cm allows one to substantially increase the β limit, provided that RWMs are stabilized by active feedback.
Journal: Plasma Physics Reports , vol. 30, no. 11, pp. 895-906, 2004
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