Rapid computing with TERPSICHORE and CAS3D MHD stability codes for a quasi-axial stellarator
The potentially attractive quasi-axially symmetric stellarator concept proposes to combine the best features of stellarators and tokamaks. As high fusion power tokamak experiments are often terminated by magnetohydrodynamic (MHD)-driven disruptions at high beta, it is important to investigate MHD stability for such a design. The TERPSICHORE and CAS3D code suites have been modified to run efficiently within the US NERSC CRAY computer scheduling system which delays or forbids execution of very large computer codes. For a low number of flux surfaces (48), the mapping codes in each suite were near or above 80 MW in size, but relatively straightforward ways were found to reduce the number and size of arrays computed. Thus, the executable size could be reduced by a factor of 2-10, without sacrificing rapid central processing unit (CPU) time. This makes possible inclusion of ballooning mode analysis with TERPSICHORE within a stellarator design optimizer and use of CAS3D for evaluation of the stability of short and long wavelength MHD.
Bibliographic Reference: Article: 1998 International Sherwood Fusion Theory Conference (1998), 1p.
Record Number: 199810667 / Last updated on: 1998-05-26
Original language: en
Available languages: en