Symmetry breaking and self-consistent rotation of magnetic islands in neoclassical viscous regimes

E. Lazzaro

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6 Citations (Scopus)

Abstract

Classical or neoclassical tearing modes (NTMs) perturb the ideal axisymmetry of tokamaks. As a consequence of symmetry breaking a neoclassical toroidal viscosity (NTV) appears, that depends on the island amplitude. This work shows that in the low collisionality regimes NTV has a key role in determining self-consistently the magnetic island velocity and at the same time modifies significantly the ion polarization current effects on NTM instability. This finding can provide a better understanding of the mechanism of onset of NTMs, observed experimentally, and improve the concepts for their control or avoidance. © 2009 American Institute of Physics.
Original languageEnglish
Article number092504
Pages (from-to)-
JournalPhysics of Plasmas
Volume16
Issue number9
DOIs
Publication statusPublished - 2009
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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