NDLI: Summary of ITER TF <formula formulatype=inline> <tex Notation=TeX>${rm Nb}_{3}{rm Sn}$</tex></formula> Strand Testing Under Axial Strain, Spatial Periodic Bending and Contact Stress

Content Provider	IEEE Xplore Digital Library
Author	Nijhuis, A. Ilyin, Y. Wessel, S. Krooshoop, E. Long Feng Miyoshi, Y.
Copyright Year	2002
Abstract	Numerous manufacturers and different strand processing techniques are involved with the production of the Nb₃Sn strand material required for ITER. The superconducting transport properties of brittle Nb₃Sn layers strongly depend on their strain state. Hence, the thermal compression and the substantial transverse load in combination with the key choice for the cabling pattern of the CICCs, will determine their performance. Knowledge of the influence of axial strain, periodic bending, and contact stress on the critical current (I _c) of the used Nb₃Sn strands is inevitable to gain sufficient confidence in an economic design and a stable operation of ITER. We have measured the I _c and n-value of Nb₃Sn strands from various manufacturers in the TARSIS facility, when subjected to spatial periodic bending and contact stress. The I _c and n-values have been determined for applied axial compressive and tensile strain varying from -0.8% up to +0.5%, between T=4.2 K and 10 K and B=6T to 14 T. The strain sensitivity varies appreciably for different strand types. We present a selection of the results obtained so far.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1516
Ending Page	1520
Page Count	5
File Size	1160870
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Tin Niobium Superconducting cables Capacitive sensors Tensile strain Manufacturing processes Production Superconducting materials Superconducting epitaxial layers Thermal loading superconductors Axial strain bending strain CICC contact stress degradation ITER ${\rm Nb}_{3}{\rm Sn}$
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Performance of ITER (EU-TFPRO-2) ${rm Nb}_{3}{rm Sn}$ Strands Under Spatial Periodic Bending, Axial Strain and Contact Stress

Spatial Periodic and Homogeneous Transverse Stress Loading on ITER TF ${rm Nb}_{3}{rm Sn}$ Bronze and Internal Tin Strand

Three-Directional FEM Analyses of Pre-Bending Effects for ${rm Nb}_{3}{rm Sn}$ Composite Wires

Pure Bending Strain Experiments on Jacketed ${rm Nb}_{3}{rm Sn}$ Strands for ITER

${rm Nb}_{3}{rm Sn}$ Strand Characterization for the Nijmegen 45 T Hybrid Magnet

Manufacturing and Preliminary Performance Expectations of $hbox{Nb}_{3}hbox{Sn}$ Based Conductors Allocated for the First ITER TF Coil With CICC From Korea

Critical-Current Measurements on an ITER Nb$_{3}$Sn Strand: Effect of Axial Tensile Strain

Superconducting Property and Strain Effect Study of the ${rm Nb}_{3}{rm Sn}$ Strands Developed for ITER

Investigation of ${rm Nb}_{3}{rm Sn}$ Strand for ITER by Bronze Route

Summary of ITER TF ${rm Nb}_{3}{rm Sn}$ Strand Testing Under Axial Strain, Spatial Periodic Bending and Contact Stress

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