Magnetohydrodynamic Stability of Spheromak Plasma in Toroidal Flux Conserver with Rectangular Cross Section.II.Application of Mercier Criterion

概要

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The magnetohydrodynamic equilibrium states by Hill's vortex model and by theCoulomb-wave-function model are proved to be unstable. New MHD equilibriumconfigurations are determined by using another model for which clp/dy=O on themagnetic axis. Here p is the pressure and y is the flux function. The values of thesafety factor on the magnetic axis, q.., are evaluated for these configurations. TheMHD stability of these equilibrium states is investigated by the Mercier criterion. Thevalues of the maximum beta ratio 73.... are evaluated for this model. The optimizedpressure distributions are determined by use of the Mercier criterion and the values ofp.... are also evaluated for these pressure distributions. The values of p.... are shownto be at most 12%, if the condition q..,.< 1 is required.
社団法人日本物理学会の論文
1985-12-15