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In this paper is presented a method to calculate the metric coefficients, necessary for MHD equilibrium and stability computations, in an axisymmetric divertor tokamak configuration. A classical flux co-ordinate system, amended by a cast function, has been used. The unknown moments - the solution of the equilibrium equation - are determined by the difference between the real flux surfaces and those described by the cast function only. With this procedure, the necessary number of moments to describe the flux surfaces in a quite complicated separatrix configuration is small enough to make computations time-efficient. As an example of the approach, the separatrix of a particular equilibrium configuration of the ASDEX-Upgrade tokamak has been considered and, for a given surface dependence of the toroidal plasma current density, some metric coefficients and the rotational transform have been computed considering the cast function only.

Additional information

Authors: ATANASIU C V, Institute of Atomic Physics, Bucharest (RO);MORARU A, University of Bucharest, Polytechnical Institute (RO);SUBBOTIN A A, Russian Research Centre, Kurchatov Institute, Moscow (RU)
Bibliographic Reference: Report: IPP 5/63 EN (1995) 18 pp.
Availability: Available from Max-Planck-Institut für Plasmaphysik, 8046 Garching bei München (DE)
Record Number: 199511653 / Last updated on: 1995-12-12
Original language: en
Available languages: en
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