Title :
The Electrical and Mechanical Characterization of Metal-Reinforced Bi-2223/Ag Conductors for High Field Insert Coil
Author :
Choi, Seyong ; Kiyoshi, Tsukasa ; Matsumoto, Shinji ; Uglietti, Davide ; Zaitsu, Kyoji ; Hase, Takashi ; Hamada, Mamoru
Author_Institution :
Supercond. Mater. Center, Nat. Inst. for Mater. Sci., Tsukuba, Japan
fDate :
6/1/2009 12:00:00 AM
Abstract :
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.
Keywords :
bismuth compounds; calcium compounds; critical currents; high-temperature superconductors; lead compounds; nuclear magnetic resonance; silver; stress-strain relations; strontium compounds; superconducting tapes; Bi2-xPbxSr2Ca2Cu3O10-Ag; conductor properties; critical current; electrical characterization; field properties; high field insert coil; high-Tc superconductor tapes; large diameter bobbin; mechanical characterization; practical NMR operation; stress-strain; Bi-2223/Ag superconductor tape; NMR insert coil; critical current; hoop stress;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2009.2017715
