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Article Dans Une Revue Plasma Physics and Controlled Fusion Année : 2017

Comparison of magnetic islands stabilization strategies from Magneto-Hydro-Dynamic simulations

Stratégies de stabilisation des îlots magnétiques établies par des simulations Magnéto-Hydro-Dynamiques

Résumé

The degradation of plasma confinement in tokamaks 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 MHD code XTOR Lütjens and Luciani (2010), which has been extended to incorporate in Ohm's law a source term model-ing the RF driven current resulting from the interaction of the RF waves with the plasma. A basic control system has been implemented in the code, allowing testing advanced strategies that require feedback on island position or phase. We focus in particular on the robustness of the control strategies towards the uncertainties that apply on 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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Dates et versions

hal-01402125 , version 1 (24-11-2016)

Identifiants

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Olivier Février, Patrick Maget, Hinrich Lütjens, Peter Beyer. Comparison of magnetic islands stabilization strategies from Magneto-Hydro-Dynamic simulations. Plasma Physics and Controlled Fusion, 2017, 59, pp.044002. ⟨10.1088/1361-6587/aa5861⟩. ⟨hal-01402125⟩
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