Completion of the French Contribution to the JT-60SA Toroidal Field Magnet

The general and detailed design of the JT-60SA toroidal field (TF) coil system was done by all the Voluntary Contributors in the project, CEA, ENEA, and F4E. The French part including the supply of 9 + 1 spare of the 18 TF winding packs and their integration in casings was entrusted mid-2011 to Alstom (Belfort, France), now General Electric. Manufacturing flow definition, drawings, and quality assurance documentation were achieved prior qualification of the critical processes. The procurement and commissioning of the needed tooling was led in parallel and the production was started in January 2014. The first winding pack was ready in the end of 2014. The integration inside the casing started in March 2015 for coil completion end 2015. Then, the coil was delivered to the coil test facility for testing at nominal operation condition (T = 4.5 K, I = 25, 7 kA) and for qualifying the coil resilience to quench events. In parallel, the successive coils were engaged in the manufacture process. The paper reports the status of the manufacture and gives a feedback on the main issues and on the technical solutions implemented. A focus is made on the mastering of the manufacturing processes, which is highlighted by the learning curve of the TF coils manufacturing.