The effect on superconducting critical currents in different stabilizing metals

Abstract

The stabilization of superconducting wires using high-purity aluminum as a stabilizing metal was investigated and the dependence of the critical current on aluminum purity was studied. The experimental procedures are described and results in terms of critical current vs. magnetic field strength for samples of 4 different aluminum purities and superconductor resistivity vs. temperature rise are presented. It was concluded that: the stabilizing materials of the superconducting wire greatly affect the critical current and are independent of the voltage sensitivity; the critical current is dependent on the voltage as well as the stabilizer resistivity and area rate; the superconductor resistance appears one digit before the stabilizer resistance; when the current flows in the stabilizer, the loss power density can not be ignored especially if the superconductor resistivity is smaller than the stabilizer resistivity; and the high-purity aluminum stabilizer is very effective in reducing the temperature rise and resistance rise. (LCL)