CRAFT TF Winding Line

The Comprehensive Research Facility for Fusion Technology (CRAFT), National big science facility in China, is focused on exploring and building key technologies and prototype systems for Chinese Fusion Engineering Test Reactor (CFETR). The toroidal field (TF) coil is one of the most important parts of CRAFT, targeting at manufacturing a prototype TF coil for CFETR. The TF coil is gigantic “D” shape, consists of a winding pack (WP) enclosed in the coil case. The WP is composed of 3 sub-WPs, called low, medium, and high field WPs. Limited by the unit length of the conductor, each sub-WP contains 1–4 subwindings connected by joints. In this article, the layout of the winding line, function, and main features of each unit are introduced, followed by the calculation of the winding trajectory. Based on these results, the detail design of the winding line has been completed, all the winding machines are under manufacturing now.