AC loss measurements on superconductors using a (low-inductive) coil geometry

In this paper loss measurements on various superconductors are presented. The measurements were performed on samples in a coil configuration. Most of the results will be used in the VAMAS Round Robin Test, in the course of which the experimental data of several laboratories throughout the world are compared. The characteristic loss parameters of the conductors are extracted from the experimental results, when possible, using classical loss theories. Except from the loss measurements, also data concerning the critical currents of various conductors have been obtained. In order to investigate the effect of the filament diameter on the current carrying capacity of multifilamentary superconductors the results of critical current measurements on conductors, others than used in the VAMAS project, are also presented. Comparing these data indicates that the transport current at lower fields consists for fine filament conductors of bulk currents and surface currents.