Global, resistive stability analysis in axisymmetric systems
Numerical codes such as ERATO and PEST have played an important role in developing the understanding of ideal-MHD stability for tokamaks. These codes solve the linearised ideal-MHD eigenvalue problem without any ordering assumptions. For resistive MHD, similar codes have been developed only recently. A resistive spectral code, MARS (Magnetohydrodynamic Resistive Spectrum) has been developed for the full compressional MHD equations in two-dimensional geometry. Axisymmetric equilibria are computed by the cubic Hermite element code CHEASE, which allows specification of the pressure and toroidal field, or the surface averaged toroidal current, as functions of the poloidal flux. The two codes use flux coordinates. MARS Fourier decomposes the components of v and B in the poloidal angle and uses a finite difference scheme in the radial direction. Results are presented for a number of resistive instabilities where toroidal effects play an important role. All calculations are made with a fixed and, except where explicitly stated otherwise, circular boundary.
Bibliographic Reference: Paper presented: 17th EPS Conference on Controlled Fusion and Plasma Heating, Amsterdam (NL), June 25-29, 1990
Availability: Available from (1) as Paper EN 35659 ORA
Record Number: 199011567 / Last updated on: 1994-12-02
Original language: en
Available languages: en