Session KP01 - Poster Session III.
POSTER session, Tuesday afternoon, March 23
Exhibit Hall, GWCC
An MHD equilibrium solver which includes optimization for particle confinement and stability is being developed for parallel architecture. The VMEC (Variational Moments Equilibrium Code) code solves three-dimensional MHD (magnetohydrodynamic) equilibrium equations using Fourier Spectral (Moments) Methods. The optimizer version of VMEC takes this equilibrium and evaluates it relative to certain target goals (e.g., aspect ratio, \beta). Quasi-omnigeneous stellarator (QOS) configurations have been found using the VMEC optimizer.(S. P. Hirshman, et al., Phys. Rev. Lett.) 80, 528 (1998). QOS configurations achieve good confinement by alignment of J-surfaces with flux surfaces. Currently the code is being modified to include COBRA(R. Sanchez, et al., Bill. Amer. Phys. Soc.) 43, 1678 (1998). (COde for Ballooning Rapid Analysis) in order to include ballooning stability in the optimization procedure. Due to the increased memory and CPU requirements, a new version of the code is being developed for parallel architecture using High Performance Fortran. The parallel code will be implemented and tested on the Cray T3E's at NERSC (National Energy Research Scientific Computing Center).