Title :
HTS conductors for magnets
Author :
Hasegawa, T. ; Koizumi, T. ; Hikichi, Y. ; Nakatsu, T. ; Scanlan, R.M. ; Hirano, N. ; Nagaya, S.
Author_Institution :
Showa Electr. Wire & Cable Co. Ltd., Kanagawa, Japan
fDate :
3/1/2002 12:00:00 AM
Abstract :
We have successfully improved the Jc value of Bi-2212 round wire to 500 kA/cm2 at 4.2 K in self-field. The Jc value strongly depended on the filament size, aspect ratio, and geometry. Adjusting the filament size made it possible to obtain wires with Jc values higher than 450 kA/cm2 in a range of wire diameters from 0.8 to 1.3 mm. The Jc value remained constant up to an applied tensile strength of 150 MPa. A 1 + 6 stranded cable fabricated using 1.02 mm diameter wires carried an Ic value of 4.5 kA at 4.2 K in self-field. A 16-strand Rutherford cable could also be fabricated using this wire.
Keywords :
bismuth compounds; calcium compounds; critical current density (superconductivity); high-temperature superconductors; strontium compounds; superconducting cables; superconducting magnets; tensile strength; 0.8 to 1.3 mm; 4.2 K; 4.5 kA; Bi-2212 round wire; Bi2Sr2CaCu2O; HTS conductor; Rutherford cable; aspect ratio; critical current density; filament size; self-field; stranded cable; superconducting magnet; tensile strength; Conducting materials; Conductors; High temperature superconductors; Magnetic materials; Manufacturing; Superconducting cables; Superconducting filaments and wires; Superconducting films; Superconducting magnets; Superconducting materials;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2002.1018602
