Session RP1 - Poster Session VIII.
POSTER session, Thursday afternoon, October 30
Fran Hill Southeast Exhibit Hall, ACC
The Quasi-Poloidal Stellarator, QPS, is a low-aspect-ratio (R/a = 2.7), compact stellarator under design at ORNL. The device parameters are R = 0.95 m, a = 0.35 m, and B = 1 T for 1.5 s with 2 MW of ECH and 3.5 MW of ICRF for plasma heating. A nonplanar modular coil set provides the primary magnetic field configuration. It has two field periods with ten modular coils per period. Due to stellarator symmetry, there are only five different coil types. Flexible copper cable conductor will be wound on a stainless steel form, vacuum impregnated with epoxy, and canned for vacuum compatibility. The coil form allows the coils to be connected into an integral structural shell. Unlike most stellarators, a vacuum vessel surrounds the coils rather than fitting inside the coils, allowing excellent access for plasma diagnostics and heating. In addition there are external vertical field and toroidal field coils and an ohmic current solenoid for configuration flexibility. First plasma operation is planned for the end of 2007. Details of the engineering design and analysis will be presented.