Effective bending strain estimated from Ic test results of a D-shaped Nb3Al CICC coil fabricated with a react-and-wind process for the National Centralized Tokamak

Japan National Centralized Tokamak (NCT) is a superconducting tokamak proposed as a modification to JT-60U. As part of the R&D for the National Centralized Tokamak, a two-turn, approximately 2m tall, D-shaped Nb3Al coil was wound and tested using a full-size cable-in-conduit conductor (CICC). The Nb3Al cable-in-conductor was bent following the heat treatment reaction with a maximum bending strain of 0.4% to simulate the react-and-wind fabrication.