Session RP1 - Poster Session VIII.
POSTER session, Thursday afternoon, October 30
Fran Hill Southeast Exhibit Hall, ACC
The Quasi-Poloidal Stellarator (QPS) is a very-low-aspect-ratio (R/a = 2.7) compact stellarator in which the dominant magnetic field components are poloidally symmetric in flux coordinates, which leads to large reductions in: neoclassical transport at low collisionality; bootstrap current; and poloidal viscosity, which allows large E x B poloidal flows for suppression of anomalous transport. The magnetic configuration is relatively insensitive to increasing beta. The experiment under design has R = 0.95 m, a = 0.35 m, B = 1 T for a 1.5-s pulse, and P(heating) = 2-4 MW. Nine independent coil currents allow varying: neoclassical transport by a factor \sim25, degree of poloidal symmetry by a factor \sim10, and poloidal viscosity by a factor of 530. QPS can study regimes in which either the anomalous transport or neoclassical transport is dominant, ballooning stability limits at beta = 2.5%, and equilibrium robustness at finite beta. Recent progress on physics issues, the relationship to other stellarator concepts, the QPS project status, and the proposed experimental program are presented.