DocumentCode
1069527
Title
Assessment of the Effect of Current Non-Uniformity on the ITER Nb3Sn Good Joint Short Sample DC Performance
Author
Richard, L. Savoldi ; Bruzzone, P. ; Mitchell, N. ; Ribani, P.L. ; Zanino, R.
Author_Institution
Dipt. di Energetica, Torino
Volume
17
Issue
2
fYear
2007
fDate
6/1/2007 12:00:00 AM
Firstpage
1382
Lastpage
1385
Abstract
The DC performance of the so-called good joint Nb3Sn short sample conductor, measured in the SULTAN facility in 1999 with a progressively reduced (chopped) joint length, became worse as the joint became shorter. In this paper we present the analysis of those tests using the THELMA code. The results confirm quantitatively that the loss of performance was due to increasingly unbalanced current distribution. Once the unbalance due to the joint is properly modeled, the performance of the conductor can be fitted using the same extra longitudinal strain in the critical current scaling, proportional to the electromagnetic load but independent of the joint length.
Keywords
fusion reactor materials; niobium alloys; silicon alloys; superconducting magnets; DC performance; International Thermonuclear Experimental Reactor; Nb3Sn - Binary; THELMA code; critical current scaling; current nonuniformity; electromagnetic load; fusion reactors; good joint; longitudinal strain; short sample conductor; superconducting magnets; Capacitive sensors; Conductors; Current distribution; Current measurement; Electromagnetic modeling; Length measurement; Niobium; Performance loss; Testing; Tin; Fusion reactors; modeling; superconducting magnets; testing;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2007.899039
Filename
4277677
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