Stability of high-current-density composite superconductor subject to pulsive and local disturbance

The stability of high-current-density composite superconductors subject to pulsive and local disturbances are analyzed for various values of super to normal metal ratioes and overall conductor current densities. The stability of high-current-density superconductors subject to pulsive disturbances greatly depends on the heat transfer characteristics in the transient nucleate boiling region. In the analysis, we used the transient heat transfer data which we measured by using a brass foil heater with a Au-Fe vs. Cr thermocouple for measuring the temperature of the heater. It is shown that the most effective way to improve the stability of high-current-density composite conductors is to increase the current margin.