- Chavda, Atik;
- Ferracin, Paolo;
- Higley, Hugh;
- Mai, Nghia;
- Majkic, Goran;
- Parthiban, Prakash;
- Peram, Jithin;
- Prestemon, Soren;
- Sambangi, Umesh;
- Sandra, Jithin sai;
- Selvamanickam, Kala;
- Selvamanickam, Venkat;
- Wang, Xiaorong
A 6-around-1 transposed cable using superconducting STAR wires can be useful for future circular collider applications. We made three cable samples using single STAR wires with a diameter of 1.3 mm. The first two samples, made with a cabling machine, used STAR wires consisting of a 0.7 mm diameter Nb-Ti core. The third cable sample was manually wound and used a STAR wire made with a 0.81 mm diameter Cu core. The first sample showed severe degradation after the cable was bent to a 75 mm radius. The current-carrying capability of the innermost and outermost rebco tapes in the STAR wire degraded by 42% to 98% and the middle rebco tapes remained intact. This was also the case for the second and straight cable sample. After fabrication of the third cable sample, we observed only about 5% reduction in the current along the wire, measured at different locations inside the terminations. The results suggest that the differences in architecture or fabrication of the STAR wires could have caused differences in critical current retention after cabling.