Development of Nb3Al superconducting wire for accelerator magnets
@ Nb3Al superconductors have shown promising performance compared to Nb3Sn conductors when processed by rapid heating/quenching process. Therefore we have started an R&D program of Nb3Al conductors for future accelerator magnets. Several test wires of around 0.8 mm diameter, which have relatively small filament (~50 micron diameter) and low matrix ratio (~1.0), were fabricated and the heat treatment and area reduction conditions after the rapid quenching process were studied. The highest non-copper Jc achieved during this study was 1734 A/mm2 at 10 T and 4.2 K.
Fig.P. Effect of the second HT condition on the critical currents.
Fig.2. Jc and n-values of the samples, which have different area reduction rates.
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