Session KP01 - Poster Session III.
POSTER session, Tuesday afternoon, March 23
Exhibit Hall, GWCC
As part of a multifaceted effort to design an interesting high performance symmetric stellarator, MHD stability is being investigated with the CAS3D code(C.Schwab, Phys. Plasmas \bf3), 2401 (1996).. Instabilities and their stabilization are being studied in several quasiaxially-symmetric stellarator (QAS) configurations corresponding to a modest size experiment with R=145 cm, B=1-2 T. CAS3D has been used to calculate the internal mode structure and instability growth rates for a two field period QAS with 20% external transform(M.H.Redi, et al.,) Sherwood Theory Meeting, Atlanta, GA (1998).. The growth rates and the identification and ordering of the largest Fourier mode components, are in good agreement with calculations of the TERPSICHORE code( W.A.Cooper, et al.), Phys. Plas. \bf3, 275 (1996).. Results of benchmarking CAS3D for the external kink (N=1) against TERPSICHORE and the PEST code for a toroidally symmetric tokamak will be presented along with progress in calculating the vertical instability (N=0) for promising QAS designs.