Short Sample Test of Superconducting Wire

Two different techniques were used for short sample tests of superconducting wires. One method was done with a DC transformer and the other with a high current DC power supply. Three different types of sample holders were used for the latter. Their relative merits and demerits are compared. Many wire designs representing half a dozen companies have been tested, and their results are presented. For the short sample test, quench current and current at various resistivities was determined. Resistivity ratios of ¿300/¿12 were found for copper, and the effect of cola work on these ratios was investigated.