Poloidal rotation effects on a simulated resistive kink mode

M. W. Kissick, J. N. Leboeuf, S. C. Cowley, J. M. Dawson

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Through the principal use of the reduced magnetohydrodynamic version of the finite aspect ratio code [L. A. Charlton et al., J. Comput. Phys. 86, 270 (1990)]. an m/n = 1/1 resistive kink mode was poloidally rotated with the accompanying rotational shear. It was observed that the growth rate of this unstable mode can either decrease or increase as the applied equilibrium rotation is increased to near poloidal sonic speeds. Shear in the poloidal rotation profile is stabilizing, but only if the destabilizing effects of bulk rotation can be overcome. Therefore, the mode's stability was sensitive to the location of the rotation's peak relative to the eigenmode's spatial extent. The destabilizing effects of bulk rotation are apparently a rotationally enhanced beta, and the stabilizing effects appear to be caused by exceeding a critical rotational shear spatially averaged over the eigenmode structure.

Original languageEnglish (US)
Pages (from-to)174-179
Number of pages6
JournalPhysics of Plasmas
Volume8
Issue number1
DOIs
StatePublished - Jan 1 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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