Design of the quasi-poloidal stellarator experiment (QPS)

Thermal modeling and analysis of a quasi-poloidal stellarator modular coil

“…The primary feature of QPS is the modular coil set which provides the base magnetic configuration. The design and fabrication of these coils is a major engineering challenge due to the complexity, precise geometric accuracy and high current density of the windings [8,9].…”

“…Stainless steel sheets are welded around the coil to provide a vacuum compatible coil. The structure is then dipped in CTD 404 epoxy for vacuum pressure impregnation using a prototypical curing cycle to form a monolithic copper-glass-epoxy composite conductor [11].…”

“…Although they operate at steady state they do allow a small bootstrap current in the plasma. Many compact stellarators are in operation design and construction phases around the world-The Large Helical Device (LHD) in Japan [5], Wendelstein 7-X in Germany [6], National Compact Stellarator Experiment (NCSX) at Princeton Plasma Physics Laboratory [7], and the quasi-poloidal stellarator (QPS) [8] at The Oak Ridge National Laboratory. The compact configurations allow larger plasmas to produce more net power.…”

Computer simulation and experimental verification of welding in thin steel sheet containment

“…The resulting plasma shape is complex, has a periodic geometry and is not axisymmetric. The Quasi-Poloidal Stellarator (QPS) is a low aspect ratio compact stellarator with a non-axisymmetric, near-poloidally symmetric magnetic configuration, being developed at The Oak Ridge National Laboratory [1]. An integral part of the QPS design is the modular coil set that produces the primary magnetic configuration.…”

“…1). After enclosing the cable, it is vacuum pressure impregnated with epoxy using a prototypical impregnation and curing cycle to form a monolithic copper-glass-epoxy composite [2].…”