Critical current degradation caused by winding process of Bi-2223/Ag HTS wire in the form of a coil

Author

Jin, J.X. ; Dou, S.X. ; Liu, H.K. ; Hardono, T. ; Cook, C. ; Grantham, C.

Author_Institution

Inst. of Supercond. & Electron. Mater., Wollongong Univ., NSW, Australia

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

138

Lastpage

141

Abstract

High T/sub c/ superconducting (HTS) (Bi,Pb)/sub 2/Sr/sub 2/Ca/sub 2/ Cu/sub 3/O/sub 10+x/ Ag-clad wire has potential for practical applications in the form of a coil or a winding. This HTS wire has strong magnetic field-dependent and mechanical strain-dependent critical currents, consequently it has a severe problem of critical current degradation when it is used in the form of a coil. To design a winding with this conductor, the critical current degradation has to be identified with relation to the magnetic fields and the winding process. This is important to optimize an appropriate coil winding procedure using this HTS wire. A specially designed noninductive sample has been made with a (Bi,Pb)/sub 2/Sr/sub 2/Ca/sub 2/ Cu/sub 3/O/sub 10+x/ Ag-clad 27-filament wire, and the critical current degradation, which is caused by the magnetic field generated and the mechanical winding procedure used to form a coil, has been separated into two factors accordingly, and discussed in this paper.

Keywords

bismuth compounds; calcium compounds; critical current density (superconductivity); high-temperature superconductors; magnetic fields; multifilamentary superconductors; silver; strontium compounds; superconducting cables; superconducting coils; winding (process); (Bi,Pb)/sub 2/Sr/sub 2/Ca/sub 2/ Cu/sub 3/O/sub 10+x/ Ag-clad wire; (BiPb)/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10/-Ag; 27-filament wire; Bi-2223/Ag HTS wire; coil; critical current degradation; high T/sub c/ superconducting wire; magnetic field; magnetic field-dependent critical currents; mechanical strain-dependent critical currents; mechanical winding procedure; winding design; winding process; Artificial intelligence; Australia; Critical current; Degradation; High temperature superconductors; Magnetic field induced strain; Magnetic fields; Superconducting coils; Superconducting filaments and wires; Superconducting magnets;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.783255

Filename

783255