Magnetohydrodynamic properties of nominally axisymmetric systems with 3D helical core

W.A. Cooper, J.P. Graves, O. Sauter, I.T. Chapman, M. Gobbin, L. Marrelli, P. Martin, I. Predebon, D. Terranova

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Abstract

Magnetohydrodynamic equilibrium states with a three-dimensional helical core are computed to model the MAST spherical tokamak and the RFX-mod reversed field pinch. The boundary is fixed as axisymmetric. The MAST equilibrium state has the appearance of an internal kink mode and is obtained under conditions of weak reversed central shear. The RFX-mod equilibrium state has seven-fold periodicity. An ideal magnetohydrodynamic stability analysis reveals that the reversal of the core magnetic shear can stabilize a periodicity-breaking mode that is dominantly m/n = 1/8 strongly coupled to a m/n = 2/15 component, as long as the central rotational transform does not exceed the value of 8. © 2011 IOP Publishing Ltd.
Original languageEnglish
Article number074008
Pages (from-to)-
JournalPlasma Physics and Controlled Fusion
Volume53
Issue number7
DOIs
Publication statusPublished - Jul 2011
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

Cite this

Cooper, W. A., Graves, J. P., Sauter, O., Chapman, I. T., Gobbin, M., Marrelli, L., ... Terranova, D. (2011). Magnetohydrodynamic properties of nominally axisymmetric systems with 3D helical core. Plasma Physics and Controlled Fusion, 53(7), -. [074008]. https://doi.org/10.1088/0741-3335/53/7/074008