Design study of HTS current lead using reinforced Bi-2212 tubular bulk

Author

Tamura, H. ; Mito, T. ; Yamada, Y. ; Tachikawa, K. ; Heller, R.

Author_Institution

National Inst. for Fusion Sci., Toki, Japan

Volume

14

Issue

2

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

686

Lastpage

689

Abstract

Current leads using HTS material have been developed for large scale superconducting magnet system. Tokai University and NIFS have been investigating characteristics of Bi-2212 tubular bulk which was prepared by a diffusion process. 8 kA of the maximum transport current was achieved at 4 K with the bulk size of 38 mm/30 mm in outer/inner diameters and 200 mm in length, respectively. The tubular bulk was reinforced by using alumina fiber and epoxy resin so that a mechanical strength was improved. Although further improvement was needed for practical use, this type of HTS bulk has a potential for flexible design since Bi-2212 layer can be reacted on the surface of any shapes of substrate. In this paper, a design of a current lead using this type of Bi-2212 tubular bulk was studied with conventional heat exchanger part and low-T_c superconducting bus line.

Keywords

bismuth compounds; calcium compounds; critical current density (superconductivity); diffusion; heat exchangers; high-temperature superconductors; mechanical strength; strontium compounds; superconducting magnets; 200 mm; 30 mm; 38 mm; 4 K; 8 kA; Bi-2212 layer; Bi₂Sr₂CaCu₂O; HTS current lead; HTS material; NIFS; Tokai University; alumina fiber; conventional heat exchanger; diffusion process; epoxy resin; high-T_c superconductor; low-T_c superconducting bus line; maximum transport current; mechanical strength; reinforced Bi-2212 tubular bulk; superconducting magnet system; Bismuth; Conducting materials; Epoxy resins; High temperature superconductors; Magnetic materials; Shape; Superconducting magnets; Superconducting materials; Superconductivity; Thermal conductivity; Alumina fiber; Bi-2212; current lead; high $rm T_rm c$ superconductor;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2004.830030

Filename

1324886