Barriers for the reduction of transport due to the EXB drift in magnetized plasmasReport as inadecuate




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* Corresponding author 1 CPT - Centre de Physique Théorique - UMR 6207 2 CPT - Centre de Physique Théorique - UMR 7332 3 IRFM - Institut de Recherche sur la Fusion par confinement Magnétique 4 Département de Recherches sur la Fusion Controlée - Département de Recherches sur la Fusion Controlée 5 DRFC - Département de Recherche sur la Fusion Contrôlée 6 MSNMGP - Modélisation et Simulation Numérique en Mécanique et Génie des Procédés

Abstract : We consider a 1 1-2degrees of freedom Hamiltonian dynamical system, which models the chaotic dynamics of charged test-particles in a turbulent electric field, across the confining magnetic field in controlled thermonuclear fusion devices. The external electric field E = −∇V is modeled by a phenomenological potential V and the magnetic field B is considered uniform. It is shown that, by introducing a small additive control term to the external electric field, it is possible to create a transport barrier for this dynamical system. The robustness of this control method is also investigated. This theoretical study indicates that alternative transport barriers can be triggered without requiring a control action on the device scale as in present Internal Transport Barriers ITB.

Keywords : Physics of plasma chaos control





Author: Natalia Tronko - Michel Vittot - Cristel Chandre - Philippe Ghendrih - Guido Ciraolo -

Source: https://hal.archives-ouvertes.fr/



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