In order to meet the strict requirements for the magnetic field configuration of the ITER device, the profile accuracy of the PF6 coil (±1.5mm after winding) had to be strictly controlled. For a superconducting coil with an external diameter of about 11.2 meters and wound in a “two-in-hand” configuration, the challenge was unprecedented. The NbTi superconductor used for winding the coil stretches up to 13.5 kilometers. Due to its technical complexity, it took six years for the manufacturing team within the Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP) to complete the task.
For the announcement and a photo of the completed coil see: