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The numerical solution of tokamak equilibrium and stability is discussed. Schemes based on finite elements are especially suited to modelling the geometry of equilibrium and to yielding high-order resolution in the stability problem. The finite element method is therefore used for the computation of equilibria and for the linear normal-mode analysis. The normal-mode analysis is performed in a non-orthogonal flux co-ordinate system and leads to a non-symmetric matrix eigenvalue problem, where the eigenvalue is complex. It is emphasised that tokamak equilibria are required to be in flux co-ordinates for stability analysis.

Additional information

Authors: KERNER W, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Article: International Journal for Numerical Methods in Fluids, Vol. 11 (1990) pp. 791-809
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