High current transport test of a YBCO bulk conductor up to 25 kA

Author

Maehata, K. ; Taino, T. ; Mizokami, M. ; Ishibashi, K. ; Takeo, M. ; Mito, T. ; Iwamoto, A. ; Yamada, S. ; Sato, Seiki ; Motojima, O. ; Shintomi, T. ; Morita, M. ; Tokunaga, T.

Author_Institution

Fac. of Eng., Kyushu Univ., Fukuoka, Japan

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

1281

Lastpage

1284

Abstract

A melt-textured YBCO bulk material was employed to obtain high current transport characteristics of a bulk high temperature superconductor. A disk-shaped YBCO bulk material 65 mm in diameter and 15 mm thick was fabricated by a modified quench and melt growth (QMG) process. An "H" shaped bulk conductor was cut from the YBCO disk. The cross sectional area and length of the conductor were 7 mm/spl times/7 mm and 20 mm, respectively. The bulk conductor was mounted in a high current bus line with a conductor-holder which allows high current feed and mechanical support against the thermal stress and electromagnetic force. Both ends of the conductor were soldered to electrodes of the conductor-holder. At 4.2 K, high current transport experiments were carried out up to 25 kA.

Keywords

barium compounds; copper compounds; high-temperature superconductors; materials testing; melt texturing; stellarators; superconducting coils; yttrium compounds; 15 mm; 20 mm; 25 kA; 4.2 K; 65 mm; 7 mm; H shaped bulk conductor; Large Helical Device; YBCO bulk conductor; YBa/sub 2/Cu/sub 3/O; YBa/sub 2/Cu/sub 3/O/sub x/; bulk high temperature superconductor; conductor-holder; disk-shaped YBCO bulk material; electrodes; electromagnetic force; high current bus line; high current feed; high current transport characteristics; high current transport experiments; high current transport test; mechanical support; melt-textured YBCO bulk material; modified quench and melt growth process; superconducting coils; thermal stress; Conducting materials; Conductors; Feeds; High temperature superconductors; Superconducting materials; Testing; Thermal conductivity; Thermal force; Thermal stresses; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.783535

Filename

783535