DocumentCode
1136923
Title
Performance of Japanese 
Conductors for ITER Toroidal Field Coils
Author
Takahashi, Yoshikazu ; Isono, Takaaki ; Koizumi, Norikiyo ; Nunoya, Yoshihiko ; Matsui, Kunihiro ; Nabara, Yoshihiro ; Hemmi, Tsutomu ; Oshikiri, Masayuki ; Uno, Y. ; Okuno, Kiyoshi ; Stepanov, Boris ; Bruzzone, Pierluigi
Author_Institution
Japan Atomic Energy Agency, Naka
Volume
18
Issue
2
fYear
2008
fDate
6/1/2008 12:00:00 AM
Firstpage
471
Lastpage
474
Abstract
The cable-in-conduit conductors for the ITER TF coils are fabricated using the latest high performance strands. The strands made by bronze and internal-tin methods are used for the conductors with a void fraction of 29% and 33%, respectively. Superconducting performance of the conductors was measured at the operating condition of the TF coils. The measured current sharing temperatures Tcs are 6.3-6.6 K for the bronze and 5.6-6.1 K for the internal-tin. The Tcs of the conductor with void fraction of 29% is 0.1-0.3 K higher than the conductor with a void fraction of 33%. It is shown from the results that the strain on the cable is between 0.7% and 0.75% and the n-values are between 4 and 6, much smaller than the n-values of strands.
Keywords
critical current density (superconductivity); fusion reactor materials; niobium alloys; superconducting cables; superconducting coils; tin alloys; type II superconductors; ITER toroidal field coil fabrication; International Thermonuclear Experimental Reactor; Japanese conductors performance; Nb3Sn; SULTAN facility; bronze strands; critical current density; internal-tin methods; measured current; superconducting performance; temperature 0.1 K to 0.3 K; temperature 5.6 K to 6.1 K; temperature 6.3 K to 6.6 K; void fraction; $hbox{Nb}_{3}hbox{Sn}$
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2008.921866
Filename
4493392
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