Stability of localized modes in rotating tokamak plasmas

J. W. Haverkort, H. J. De Blank

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

The ideal magnetohydrodynamic stability is investigated of localized interchange modes in a large-aspect ratio tokamak plasma. The resulting stability criterion includes the effects of toroidal rotation and rotation shear and contains various well-known limiting cases. The analysis allows for a general adiabatic index, resulting in a stabilizing contribution from the convective effect. A further stabilizing effect from rotation exists when the angular frequency squared decreases radially more rapidly than the density. Flow shear, however, also decreases the stabilizing effect of magnetic shear through the Kelvin-Helmholtz mechanism. Numerical simulations reveal the merits and limitations of the performed local analysis.

Original languageEnglish
Article number045008
JournalPlasma Physics and Controlled Fusion
Volume53
Issue number4
DOIs
Publication statusPublished - 1 Apr 2011
Externally publishedYes

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