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

• Published in: IEEE transactions on applied superconductivity 2009-06, Vol.19 (3), p.2889-2892
• Main Authors: Seyong Choi, Kiyoshi, T., Matsumoto, S., Uglietti, D., Zaitsu, K., Hase, T., Hamada, M.
• Format: Article
• Language: English
• Subjects: Applied sciences; Bi-2223/Ag superconductor tape; COILING; Conductors; Critical current; Current measurement; ELECTRICAL CONDUCTORS; Electrical engineering. Electrical power engineering; Electromagnets; Electronics; Exact sciences and technology; High temperature superconductors; hoop stress; MAGNETIC FIELD; Magnetic field measurement; Magnetic fields; Materials; Mechanical factors; MECHANICAL PROPERTIES; Mechanical variables measurement; NMR insert coil; REINFORCEMENT; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Silver; Spools; Superconducting coils; Superconducting devices; Superconducting films; Superconducting integrated circuits; Superconducting tapes; SUPERCONDUCTIVITY; SUPERCONDUCTORS; TAPE; Various equipment and components
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2009.2017715

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.