Experimental Investigation of a Quench Detection Method Utilizing Current Redistribution With the Hall Probe in HTS Cables

The complexity of the Cable-in-Conduit Conductor (CICC) structure made with second-generation high-temperature superconducting materials presents challenges for quench detection, which is different from low-temperature superconductors due to their relatively low propagation velocity. This study builds upon simulation results from a quench detection method that focuses on current redistribution effects. The objective is to further investigate the relationship between the level of current redistribution, hot spot power, operating current, and the size of the detection signal. Parameters under examination include the height of the Hall probe, the distance between the Hall probe and the hot spot, and the square wire identification where the Hall probe is positioned. The findings of this study demonstrate that the quench detection method, based on current redistribution effects, is effective in detecting hot spots in twisted HTS cables. Furthermore, a comprehensive analysis is conducted to evaluate the impact of the operating current on the level of current redistribution and the influence of the Hall probe height on the detection signal.