The ORNL/General dynamics/AIRCO design for the DOE 12-tesla magnet program

General Dynamics Convair Division has been actively engaged in development of toroidal field superconducting magnet concepts for future tokamak reactor systems. Experience with the Oak Ridge National Laboratory (ORNL) Large Coil Program (LCP) has been instrumental in our study of the toroidal field coil requirements for an engineering test facility (ETF), made up of twelve 6m × 10m-bore size 12-Tesla magnets. Under contract to ORNL, General Dynamics has teamed with Airco to examine the engineering requirements for ETF, with particular emphasis placed on development of a candidate Nb3Sn pool boiling 12-Tesla conductor. This paper highlights the results of the General Dynamics-Airco scoping study which produced a simple, reliable, and achievable conductor designed to meet the performance aspects of an ETF-size toroidal field magnet.