Superconductivity - Residual resistance ratio measurement. Residual resistance ratio of Nb-Ti and Nb3Sn composite superconductors
Superconductivity - Residual resistance ratio measurement. Residual resistance ratio of Nb-Ti and Nb3Sn composite superconductors
1 Scope This part of IEC 61788 specifies a test method for the determination of the residual resistance ratio ( RRR ) of Nb-Ti and Nb 3 Sn composite superconductors with Cu, Cu-Ni, Cu/Cu-Ni and Al matrix. 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 mm 2 . In the case of Nb 3 Sn, the specimens have received a reaction heat-treatment.
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