1.8 K test of binary and ternary superconducting conductors

A series of short sample tests have been carried out on Nb-Ti-based binary and ternary alloy conductors. It turns out that the current carrying capacities at high fields of both binary and ternary alloys can be remarkably improved over those previously reported by heavy cold-working after heat treatment. It should be emphasized that the superconducting performance of these ternary alloy conductors manufactured in industrial scale are fairly reliable and that the best results are obtained with Nb-Ti-Ta ternary alloys. Results are shown also on long samples and large kiloampere cables.