Manufacture of the Westinghouse forced flow Nb3Sn test coil for the large coil program

Manufacturing of the Westinghouse forced flow Nb3Sn coil for the Oak Ridge National Laboratory Large Coil Program (LCP) is complete. The coil is installed in the Large Coil Test Facility (LCTF) at Oak Ridge National Laboratory and is being tested. The coil design concept is briefly presented to better understand the complexities of the manufacturing processes. This paper describes step-by-step procedures for the Westinghouse LCP coil manufacture. The facilities required and the training of the shop personnel are also discussed. The quality requirements and the quality procedures at each step of fabrication are described. Some of the serious problems which arose during manufacturing are pointed out along with the fixes to these problems. Some of the important development tasks needed for manufacture of this coil are listed. In every case, the completion of these tasks resulted in process modification prior to actual commitment to manufacture. This paper also highlights the major design and manufacturing advantages of the Westinghouse LCP coil. The goal of the Westinghouse LCP coil is to demonstrate the potential of Nb3Sn for large scale applications to either high field or high current density magnets.