Coil performances of superconducting cables of AC applications

Multifilamentary superconducting wires with a greatly reduced level of losses have been produced with unit lengths of several tens of kilometers. Three industrial wires named `L´, `T´, and `S´, have been manufactured, comprising, respectively, 377982, 597102, and 920304 filaments, 0.14 μm in diameter with a 0.13 μm spacing between filaments. Coils made with (6+1) cables of each kind of strand have been tested. The results of coil tests performed with a (6+1) of `L´ strand from 0 to 100 Hz are given, as well as the first results of tests of coils made with two-stage cables (6+1)² with `L´, `T´, and `S´ strands