CENELEC - European Committee for Electrotechnical Standardization
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EN IEC 61788-23:2018
Scope
This part of IEC 61788 addresses a test method for the determination of the residual resistance ratio (RRR)@ rRRR @ of cavity-grade niobium. This method is intended for high-purity niobium grades with 15 < rRRR < 600. The test method should be valid for specimens with rectangular or round cross-section@ cross-sectional area greater than 1 mm2 but less than 20 mm2@ and a length not less than 10 nor more than 25 times the width or diameter.
EN IEC 61788-23:2018 history
2018EN IEC 61788-23:2018 Superconductivity - Part 23: Residual resistance ratio measurement - Residual resistance ratio of Nb superconductors