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Heat Treatment and Characterization of \hbox {Nb}_{3} \hbox {Sn} Strands for the Model Coil of the 40-T Hybrid Magnet

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4 Author(s)
P. He ; Superconducting Magnets Group, Chinese High Magnetic Field Laboratory, Chinese Academy of Sciences , Hefei, China ; Z. M. Chen ; W. G. Chen ; Y. F. Tan

A model coil for the 40-T hybrid magnet is being built at the Chinese High Magnetic Field Laboratory, Chinese Academy of Sciences. /restack-rod-process (RRP) strands adopted for the model coil were heat-treated according to the heat treatment (HT) schedule recommended by the manufacturer, which is Oxford Superconducting Technology. The microstructure of the reacted strand was analyzed. Measurements of the critical current, the residual resistivity ratio and the hysteresis losses were also carried out. The results of critical-characteristic measurements confirmed that the performance of the heat-treated wire was good. All characteristics indicated that the HT of the /RRP strands was successfully completed.

Published in:

IEEE Transactions on Applied Superconductivity  (Volume:20 ,  Issue: 6 )