Abstract
Abstract
The Rutherford cable here was made of 12 single-core MgB2
in-situ wires with an NbTi resistive barrier and a CuNi outer sheath. The uniformity of the wires and cables was analyzed using x-ray microtomography. The critical currents of the wire and cable samples were measured at 4.2 K in the outer fields from 4.0 to 8.0 T, and at 15 K–25 K in fields from 1.0 to 5.5 T. Magnetization AC losses were measured at temperatures of 20 K–40 K, external fields of 0.001–0.1 T and frequencies of 72 and 144 Hz. The obtained results show high engineering current density and reduced losses in the MgB2 cable, which can be especially interesting for windings of superconducting motors or generators.