Orateur
Description
"Suprafusion is a French exploratory program focusing on the development of high-temperature superconductors (HTS). In particular, the program aims to design, manufacture and test a large-scale HTS demonstrator magnet. To meet this goal, the program will follow a stepwise development plan with smaller mockups and prototypes to qualify the main demonstrator key technological bricks. The first prototype (called D0) will aim to study the quench detection of HTS copper stabilized insulated coil.
The D0 prototype HTS conductor will be first wound as a one-layer spiral on a stainless steel mandrel with a bending radius of 60 mm. Then, the mandrel will be assembled with large copper pieces soldered to the conductor and ensuring a good electrical connection to the busbars. To ensure a homogeneous thermal map and allow parametric studies, the whole device will be actively cooled by forced flow supercritical helium. The design target is to operate this prototype and perform quench studies at 10-20 kA, 4.5 K under a field of nearly 9 T (in a solenoid background field magnet called OPTIMIST). Once under operation, this prototype will allow us to qualify several key aspects of our technology: the propagation quench velocity, the conductor hot spot temperature, the quench detection system sensitivity, the conductor critical current, etc. This poster will present the main design aspects of this D0 prototype, as well as the production of the first samples, mainly to validate the conductor winding, the installation of heaters and HTS SQD."