The Electrical and Mechanical Characterization of Metal-Reinforced Bi-2223/Ag Conductors for High Field Insert Coil

In this study, we investigated in field properties of high-
Tc
superconductor (HTS) tapes electrically as well as mechanically. Metallic reinforced Bi-2223/Ag superconductor tapes were used in this work. The critical current (
Ic
), which is highly dependent on the magnetic field, was measured using fields applied parallel and perpendicular to the tape surface. The conductor was exposed to fields of up to 28 T at 4.2 K. In order to confirm the performance of tapes in practical NMR operation,
Ic
was also measured around 2 K. The conductor was wound on a large diameter bobbin and mechanical properties were then measured as the coil current was increased. Finally, we verified the conductor properties from coil
Ic
and maximum stress/strain of it.