Diamagnetic thresholds for sawtooth cycling in tokamak plasmas

Federico D. Halpern; Hinrich Lütjens; Jean François Luciani

doi:10.1063/1.3646305

Diamagnetic thresholds for sawtooth cycling in tokamak plasmas

Federico D. Halpern
, Hinrich Lütjens
, Jean François Luciani

CNRS

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

49 Citations (Scopus)

Résumé

The cycling dynamics of the internal kink mode, which drives sawtooth oscillations in tokamak plasmas, is studied using the three dimensional, non-linear magnetohydrodynamic (MHD) code XTOR-2F H. Ltjens and J.-F. Luciani, J. Comput. Phys. 229, 8130 (2010). It is found that sawtooth cycling, which is characterized by quiescent ramps and fast crashes in the experiment, can be recovered in two-fluid MHD provided that a criterion of diamagnetic stabilization is fulfilled. The simulation results indicate that diamagnetic effects alone may be sufficient to drive sawteeth with complete magnetic reconnection in high temperature Ohmic plasmas.

langue originale	Anglais
Numéro d'article	102501
journal	Physics of Plasmas
Volume	18
Numéro de publication	10
Les DOIs	https://doi.org/10.1063/1.3646305
état	Publié - 1 janv. 2011

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10.1063/1.3646305

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abstract = "The cycling dynamics of the internal kink mode, which drives sawtooth oscillations in tokamak plasmas, is studied using the three dimensional, non-linear magnetohydrodynamic (MHD) code XTOR-2F H. Ltjens and J.-F. Luciani, J. Comput. Phys. 229, 8130 (2010). It is found that sawtooth cycling, which is characterized by quiescent ramps and fast crashes in the experiment, can be recovered in two-fluid MHD provided that a criterion of diamagnetic stabilization is fulfilled. The simulation results indicate that diamagnetic effects alone may be sufficient to drive sawteeth with complete magnetic reconnection in high temperature Ohmic plasmas.",

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AU - Halpern, Federico D.

AU - Lütjens, Hinrich

AU - Luciani, Jean François

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AB - The cycling dynamics of the internal kink mode, which drives sawtooth oscillations in tokamak plasmas, is studied using the three dimensional, non-linear magnetohydrodynamic (MHD) code XTOR-2F H. Ltjens and J.-F. Luciani, J. Comput. Phys. 229, 8130 (2010). It is found that sawtooth cycling, which is characterized by quiescent ramps and fast crashes in the experiment, can be recovered in two-fluid MHD provided that a criterion of diamagnetic stabilization is fulfilled. The simulation results indicate that diamagnetic effects alone may be sufficient to drive sawteeth with complete magnetic reconnection in high temperature Ohmic plasmas.

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DO - 10.1063/1.3646305

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Diamagnetic thresholds for sawtooth cycling in tokamak plasmas

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