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BENDING EFFECTS ON CRITICAL CURRENTS OF
Nb3Sn SUPERCONDUCTING WIRES

M. Takayasu1, L. Chiesa2, J. H. Schultz1, and J. V. Minervini1

1Massachusetts Institute of Technology Cambridge, MA, 02139, USA
2Tufts University Medford, MA, 02155, USA

ABSTRACT - Bending effects on Nb3Sn wires have been investigated to understand the critical current degradation of large Nb3Sn superconducting cables. An integrated model taking into accounts the neutral axis shift, the current transfer length, the mechanical filament breakage and the uniaxial strain release due to applying bending has been developed. Five different Nb3Sn wires, developed by the ITER parties, were tested. The experimental data are presented and analyzed with a newly developed integrated model. The current transfer effect shows to be an important factor.

KEYWORDS: Bending strain, neutral axis shift, current transfer, filament breakage, Nb3Sn superconductor.

Full Text, PDF

IEEE/CSC & ESAS EUROPEAN SUPERCONDUCTIVITY NEWS FORUM (ESNF), No. 10, October 2009
Published in AIP Conference Proceedings 1219, pp. 239-246 (2010)

ICMC-ST124 - European Superconductivity News Forum

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