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Title: Nonlinear magnetohydrodynamic simulation of Tore Supra hollow current profile discharges

Abstract

Magnetohydrodynamic (MHD) activity often undermines the realization of fully noninductive plasma discharges in the Tore Supra tokamak [J. Jacquinot, Nucl. Fusion 45, S118 (2005)], by producing large degradation of electron energy confinement in the plasma core and the bifurcation to a regime with permanent MHD activity. The nonlinear evolution of MHD modes in these hollow current density profile discharges is studied with the full-scale three-dimensional MHD code XTOR [K. Lerbinger and J.-F. Luciani, J. Comput. Phys. 97, 444 (1991)] and compared with experimental features. Large confinement degradation is predicted when q(0) is close to 2. This derives either from the full reconnection of an unstable double-tearing mode, or from the coupling between a single tearing mode and adjacent stable modes in a region with reduced magnetic shear.

Authors:
; ; ; ; ;  [1];  [2]
  1. Association Euratom-CEA, CEA/DSM/DRFC, Centre de Cadarache, 13108 Saint Paul lez Durance (France)
  2. (France)
Publication Date:
OSTI Identifier:
20974990
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 14; Journal Issue: 5; Other Information: DOI: 10.1063/1.2733677; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BIFURCATION; CURRENT DENSITY; CURRENTS; ELECTRONS; MAGNETIC RECONNECTION; MAGNETOHYDRODYNAMICS; NONLINEAR PROBLEMS; PLASMA; PLASMA CONFINEMENT; PLASMA SIMULATION; TEARING INSTABILITY; THREE-DIMENSIONAL CALCULATIONS; TORE SUPRA TOKAMAK

Citation Formats

Maget, P., Huysmans, G. T. A., Garbet, X., Ottaviani, M., Luetjens, H., Luciani, J.-F., and Centre de Physique Theorique, Ecole Polytechnique, F-91128 Palaiseau. Nonlinear magnetohydrodynamic simulation of Tore Supra hollow current profile discharges. United States: N. p., 2007. Web. doi:10.1063/1.2733677.
Maget, P., Huysmans, G. T. A., Garbet, X., Ottaviani, M., Luetjens, H., Luciani, J.-F., & Centre de Physique Theorique, Ecole Polytechnique, F-91128 Palaiseau. Nonlinear magnetohydrodynamic simulation of Tore Supra hollow current profile discharges. United States. doi:10.1063/1.2733677.
Maget, P., Huysmans, G. T. A., Garbet, X., Ottaviani, M., Luetjens, H., Luciani, J.-F., and Centre de Physique Theorique, Ecole Polytechnique, F-91128 Palaiseau. Tue . "Nonlinear magnetohydrodynamic simulation of Tore Supra hollow current profile discharges". United States. doi:10.1063/1.2733677.
@article{osti_20974990,
title = {Nonlinear magnetohydrodynamic simulation of Tore Supra hollow current profile discharges},
author = {Maget, P. and Huysmans, G. T. A. and Garbet, X. and Ottaviani, M. and Luetjens, H. and Luciani, J.-F. and Centre de Physique Theorique, Ecole Polytechnique, F-91128 Palaiseau},
abstractNote = {Magnetohydrodynamic (MHD) activity often undermines the realization of fully noninductive plasma discharges in the Tore Supra tokamak [J. Jacquinot, Nucl. Fusion 45, S118 (2005)], by producing large degradation of electron energy confinement in the plasma core and the bifurcation to a regime with permanent MHD activity. The nonlinear evolution of MHD modes in these hollow current density profile discharges is studied with the full-scale three-dimensional MHD code XTOR [K. Lerbinger and J.-F. Luciani, J. Comput. Phys. 97, 444 (1991)] and compared with experimental features. Large confinement degradation is predicted when q(0) is close to 2. This derives either from the full reconnection of an unstable double-tearing mode, or from the coupling between a single tearing mode and adjacent stable modes in a region with reduced magnetic shear.},
doi = {10.1063/1.2733677},
journal = {Physics of Plasmas},
number = 5,
volume = 14,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}