The experimental study of AC loss dependency on joint method in BSCCO-2223 tape

In case of manufacturing applied superconducting machines using high-Tc superconductors (HTS) such as SMES, MAGLEV and superconducting generators, superconducting joints are very important because they need very long tapes. For this reason, the investigation of AC loss of jointed tapes should be considered as well as that of the AC loss of jointless tapes, and so the authors investigated the tendency of AC loss with superconducting joint, and compared the AC loss of jointed tapes with that of jointless tapes. In this paper, the AC loss in BSCCO-2223 silver (Ag) sheathed tapes was measured by using the four-probe transport technique at 77 K. Firstly, it was shown that the experimental measurement of AC loss in the tapes agree well with the calculated values provided by the Norris equation. Moreover, it was shown that the AC loss depends on amplitude of transport current. Finally, it was shown that the AC loss depends on joint resistance and index n