Modular Coil Design Developments for the National Compact Stellarator Experiment (NCSX)

Conference · Sat Jan 01 00:00:00 EST 2005

OSTI ID:1128947

Williamson, David E ^[1]; Brooks, A. ^[2]; Brown, T. ^[2]; Chrzanowski, J. ^[2]; Cole, Michael J ^[1]; Fan, H-M. ^[2]; Freudenberg, Kevin D ^[1]; Fogarty, Paul J ^[1]; Hargrove, Tom ^[1]; Heitzenroeder, P. ^[2]; Lovett, G. ^[3]; Miller, P. ^[3]; Myatt, R. ^[4]; Nelson, Brad E ^[1]; Reiersen, W. ^[2]; Strickler, Dennis J ^[1]

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1. ORNL
2. Princeton Plasma Physics Laboratory (PPPL)
3. MK Technologies, Knoxville, TN
4. Myatt Consulting, Norfolk, MA

The National Compact Stellarator Experiment (NCSX) is a quasi-axisymmetric facility that combines the high beta and good confinement features of an advanced tokamak with the low current, disruption-free characteristics of a stellarator. The experiment is based on a three field-period plasma configuration with an average major radius of 1.4 m, a minor radius of 0.3m, and a toroidal magnetic field on axis of up to 2 T. The modular coils are set in a complex assembly of four coil systems that surround the highly shaped plasma. There are six each of three coil types in the assembly for a total of 18 modular coils. The coils are constructed by winding copper cable onto a cast stainless steel winding form that has been machined to high accuracy, so that the current center of the winding pack is within 1.5 mm of its theoretical position. The modular coils operate at a temperature of 80K and are subjected to rapid heating and stress during a pulse. At this time, the project has completed construction of several prototype components which validate the fabrication and inspection processes that are planned for the production coils. In addition, some advanced techniques for error-field compensation and assembly simulation using computer-aided design (CAD) have been developed.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1128947
• Resource Relation: Conference: 23rd Symposium on Fusion Technology (SOFT-23), Venice, Italy, 20040920, 20040924
• Country of Publication: United States
• Language: English

Related Subjects

NCSX