DocumentCode
1367602
Title
Spatial Periodic and Homogeneous Transverse Stress Loading on ITER TF 
Bronze and Internal Tin Strand
Author
Nijhuis, A. ; van Meerdervoort, R. P. Pompe ; Wessel, W.A.J.
Author_Institution
Fac. of Sci. & Technol., Energy, Mater. & Syst., Univ. of Twente, Enschede, Netherlands
Volume
22
Issue
3
fYear
2012
fDate
6/1/2012 12:00:00 AM
Firstpage
4802405
Lastpage
4802405
Abstract
The transport properties of the superconducting Nb3Sn layers in the strands strongly depend on the strain state. Knowledge of the influence of axial strain, periodic bending and contact stress on the critical current (Ic) of the used strands is inevitable to gain sufficient confidence in an economic design and stable operation of ITER Nb3Sn. In the past years we have measured the Ic and n-value of various ITER strands with different layout in the TARSIS facility, when subjected to spatial periodic contact stress at a temperature of 4.2 K and in a magnet field of 12 T. Recently we have made the setup suitable for application of homogeneous load along the length of the wire (125 mm) in order to evaluate possible differences related to spatial stress and possible current distribution. We present an overview of the results obtained so far on an ITER TF bronze and internal tin strand.
Keywords
critical current density (superconductivity); niobium compounds; superconducting materials; ITER TF Nb3Sn bronze strand; Nb3Sn; axial strain; critical current; current distribution; homogeneous transverse stress loading; internal tin strand; magnet field; periodic bending; size 125 mm; spatial periodic contact stress; spatial periodic stress loading; strain state; temperature 4.2 K; transport properties; Critical current; Current measurement; Integrated circuits; Niobium-tin; Strain; Stress; Wires; ${rm Nb}_{3}{rm Sn}$ ; strain; transverse load;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2011.2174552
Filename
6069559
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