OPTIMIZATION OF COMPUTATIONAL MHD NORMAL-MODE ANALYSIS FOR TOKAMAKS

A set of MHD equations that are optimized for specific tokamak conditi ons is derived and implemented in the new ideal-MHD code MISHKA-1. The numerical scheme is based on the Galerkin method (which solves the eq uations in their weak form) and allows the study of problems that are described by nonself-adjoint Mi-ID operators. Consequently, the MISHKA -1 code call be improved to describe non-ideal MHD effects including d rift and neoclassical and other essentially kinetic effects that ale i mportant for the stability of high temperature plasmas. The new ideal MHD code described in this paper can be treated as a first step toward a ''generalized MHD'' code for a set of moment equations for ion and electron distribution functions in different collisionality plasmas.