Wall forces produced during ITER disruptions

Nonlinear simulations with the M3D code [ W. Park , Phys. Plasmas 6 , 1796 ( 1999 ) ] are performed of disruptions produced by large scale magnetohydrodynamic instabilities. The toroidally asymmetric wall forces produced during a disruption are calculated in an ITER [ T. Hender , Nucl. Fusion 47 , S...

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Veröffentlicht in:Physics of plasmas 2010-08, Vol.17 (8), p.082505-082505-9
Hauptverfasser: Strauss, H. R., Paccagnella, R., Breslau, J.
Format: Artikel
Sprache:eng
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Zusammenfassung:Nonlinear simulations with the M3D code [ W. Park , Phys. Plasmas 6 , 1796 ( 1999 ) ] are performed of disruptions produced by large scale magnetohydrodynamic instabilities. The toroidally asymmetric wall forces produced during a disruption are calculated in an ITER [ T. Hender , Nucl. Fusion 47 , S128 ( 2007 ) ] model. The disruption is produced by a vertical displacement event and a kink mode. Expressions are derived for the wall force, including the sideways force, using a thin conducting wall model. The scaling of wall force with γ τ w is obtained, where γ is the kink growth rate and τ w is the wall penetration time. The largest force occurs with γ τ w ≈ 1 . A theory is developed of the wall force produced by kink modes. The theory is in qualitative agreement with the simulations and Joint European Torus [ V. Riccardo , Nucl. Fusion 49 , 055012 ( 2009 ) ] experiments. In particular, the theory and simulations give dependence of the sideways on γ τ w , correlation of sideways force with sideways plasma displacement, and correlation of toroidally varying plasma current with toroidally varying vertical displacement.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.3474922