INFLUENCE OF COPPER-TO-SUPERCONDUCTOR RATIO ON THE STABILITY OF HIGH-CURRENT DENSITY SUPERCONDUCTOR

Many works have analyzed the influence of copper-to-superconductor (Cu /Sc) ratio on the stability of high current density superconductors. H owever, the existing models are insufficient for explaining experiment al results such as those obtained for SSC superconductors by Ghosh et al. The existing models attempt to explain the experimental results by studying the influence of the Cu/Sc ratio on the minimum quench energ y. On the other hand, we interpret the experimental results from a mec hanical standpoint, namely that of disturbances due to conductor motio n. The Cu/Sc ratio affects the mechanical restraint of a conductor in the winding and hence the size of potential conductor motions. In our previous works, a theory was derived to predict the energy released by a conductor motion based on the fixing condition of the conductor[1]- [3]. In this paper, we apply our theory to investigate Ghosh's experim ental results; the relation between the Cu/Sc ratio and possible distu rbances due to conductor motion is statistically studied. Our analytic al results closely match the experimental data.