Speaker
Nikolay Bykovsky
(Swiss Plasma Center)
Description
Various tests performed with full-size 60 kA HTS cable prototypes for fusion magnets in EDIPO test facility demonstrated that design of HTS strand proposed at Swiss Plasma Center – stack of HTS tapes twisted and soldered between two copper profiles – is applicable for high-current fusion cables, but additional mechanical reinforcement is still needed. Based on experimentally obtained correlation between the performances of cable prototypes at different operating conditions, further key investigation of cycling transverse load on the strand performance was performed at 77 K. Aiming to obtain a strand design able to withstand a continuous cycling load operation of some thousand cycles, following aspects of the strand design were studied – geometry of the strand, preliminary annealing of the copper profiles, manufacture of HTS tapes. Appropriate FEM mechanical modelling is performed and reported, showing a good agreement with the test results. Based on the obtained data, next design of HTS cable prototype will be discussed.
Co-authors
Davide Uglietti
(Swiss Plasma Center, EPFL, 5232 Villigen-PSI, Switzerland)
Nikolay Bykovsky
(Swiss Plasma Center, EPFL, 5232 Villigen-PSI, Switzerland)
Pierluigi Bruzzone
(Swiss Plasma Center, EPFL, 5232 Villigen-PSI, Switzerland)
Rainer Wesche
(Swiss Plasma Center, EPFL, 5232 Villigen-PSI, Switzerland)
