Design description of the saddle coils for the National Compact Stellarator Experiment (NCSX)

The National Compact Stellarator Experiment (NCSX) is proposed as a test of a low aspect ratio, quasi-axisymetric plasma configuration that exhibits high beta and good confinement in a disruption-free environment. The experiment will be built on the site of the Princeton Beta Experiment (PBX-M) tokamak and utilize many of the existing coils and ancillary equipment. A stellarator core, which includes the vacuum vessel, saddle coils with supporting structure, and a cryostat will be constructed off-site and placed-into the existing facility. This paper describes the pre-conceptual design of the saddle coils and structural shell components of the core.