Development of a superconducting joint technique between CIC conductors for poloidal coil of large helical device (LHD)

Author

Hanawa, S. ; Wachi, Y. ; Shibayama, K. ; Shibuya, J. ; Mizumaki, S. ; Yamamoto, T. ; Nakamoto, K. ; Kai, T. ; Takahata, K. ; Yamamoto, J. ; Satow, T. ; Motojima, O.

Author_Institution

Toshiba Corp., Yokohama, Japan

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

757

Lastpage

760

Abstract

A solid state bonding technique been developed for the large superconducting joint of LHD poloidal coils. Low electrical resistance, high superconducting stability and compactness are required for the joints between pancake coils. All NbTi strands of cable-in-conduit (CIC) conductors were jointed directly and at one time by the proposed technique. From the critical current test with the real scale joint model, it is shown that quench current of this joint is about 1/3 times of the conductor critical current. This paper describes the main points in manufacturing the joint and evaluation of the quench current.<>

Keywords

cable jointing; design engineering; electric conduits; niobium alloys; power cable testing; power cables; superconducting cables; superconducting coils; superconducting magnets; titanium alloys; LHD; NbTi; cable-in-conduit conductors; critical current test; design; electrical resistance; fabrication; large helical device; manufacturing; pancake coils; poloidal coil; quench current; superconducting joint technique; superconducting stability; Bonding; Conductors; Critical current; Electric resistance; Niobium compounds; Solid state circuits; Stability; Superconducting cables; Superconducting coils; Titanium compounds;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.402658

Filename

402658