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Development of 10 kA class Nb3Al superconducting cable by jelly-roll process [for fusion magnets]

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6 Author(s)

A multifilamentary Cu/Nb3Al composite strand was developed with a noncopper critical current density of more than 400 A/mm2 at 12 T, by a jelly-roll process. A 10-kA cable-in-conduit conductor was fabricated to demonstrate its applicability to fusion magnets. The cable had 324 strands, and a circular CuNi seamless pipe was used as the conduit. The strand diameter was 0.88 mm and the filament diameter was 28 μm. The heat treatment was performed at 820°C for 2 h

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Magnetics, IEEE Transactions on  (Volume:27 ,  Issue: 2 )