Comparison of magnetic island stabilization strategies from magneto-hydrodynamic simulations

被引：9
作者：
Fevrier, O. [1 ]
Maget, P. [1 ]
Luetjens, H. [2 ]
Beyer, P. [3 ]
机构：
[1] CEA, IRFM, F-13108 St Paul Les Durance, France
[2] Ecole Polytech, CNRS UMR 7644, Ctr Phys Theor, F-91128 Palaiseau, France
[3] Aix Marseille Univ, CNRS, PIIM UMR 7345, F-13397 Marseille 20, France
来源：
PLASMA PHYSICS AND CONTROLLED FUSION | 2017年 / 59卷 / 04期
关键词：
ECCD; magnetic island; magneto-hydro-dynamic; nonlinear computation; tearing; island control; NEOCLASSICAL TEARING MODES; LOCALIZED CURRENT DRIVE; CYCLOTRON CURRENT DRIVE; TOKAMAK; DYNAMICS; INSTABILITIES; CURVATURE; ECRH; MHD;
D O I：
10.1088/1361-6587/aa5861
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The degradation of plasma confinement in tokamaks caused by magnetic islands motivates to better understand their possible suppression using electron cyclotron current drive (ECCD) and to investigate the various strategies relevant for this purpose. In this work, we evaluate the efficiency of several control methods through nonlinear simulations of this process with the toroidal magneto-hydro-dynamic (MHD) code XTOR-2F (Lutjens and Luciani 2010 J. Comput. Phys. 229 8130-43), which has been extended to incorporate in Ohm's law a source term modeling the driven current resulting from the interaction of the EC waves with the plasma. A basic control system has been implemented in the code, allowing testing of advanced strategies that require feedback on island position or phase. We focus in particular on the robustness of the control strategies towards uncertainties that apply to the control and ECCD systems, such as the risk of misalignment of the current deposition or the possible inability to generate narrow current deposition.
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页数：14
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