AC loss measurements of Rutherford type superconducting cables under mechanical stresses

Experimental apparatus for measurements of AC losses in Rutherford type cable conductors has been constructed. A number of compacted cable samples have been measured. Hysteresis loss, loss from coupling within strands and loss from interstrand coupling are distinguished from each other. The results show that even for cables without soldering and coating, the AC losses may be quite different from each other due to interstrand coupling loss. As the curing temperature increases, interstrand coupling loss tends to increase. For some cables, interstrand coupling loss increases nearly geometrically with the increase of curing temperature. Most of the samples did not show dependence of loss on mechanical pressure.>