Development of a beryllium copper inner leg for the CIT toroidal field coil

A combination of high strength and high conductivity will be required for the inner leg of the toroidal field coils on the CIT (Compact Ignition Tokamak). An alternative to the baseline laminate design is a C17510 beryllium copper conductor with enhanced strength and conductivity. Two vendors were engaged in a program which resulted in full size, tapered prototype conductors. The results of the program are discussed, and a summary of material properties is presented. The issues of production feasibility and the need for additional development are also addressed.<>