Superconductivity – Part 4: Residual resistance ratio measurement – Residual resistance ratio of Nb‑Ti and Nb3Sn composite superconductors
|Publication Date:||1 March 2020|
|ICS Code (Superconductivity and conducting materials):||29.050|
|ICS Code (Measurement of electrical and magnetic quantities):||17.220.20|
This part of IEC 61788 specifies a test method for the determination of the residual resistance ratio (RRR) of Nb-Ti and Nb3Sn composite superconductors with Cu, Cu-Ni, Cu/Cu-Ni and Al matrix in a strain-free condition and zero external magnetic field. This method is intended for use with superconductor specimens that have a monolithic structure with rectangular or round cross-section, RRR value less than 350, and cross-sectional area less than 3 mm2. In the case of Nb3Sn, the specimens have received a reaction heat-treatment.