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Standards [CURRENT]

DIN EN IEC 61788-23 ; VDE 0390-23:2025-07
Superconductivity - Part 23: Residual resistance ratio measurement - Residual resistance ratio of cavity-grade Nb superconductors (IEC 61788-23:2024); German version EN IEC 61788-23:2024

Title (German)

Supraleitfähigkeit - Teil 23: Messung des Restwiderstandsverhältnisses - Restwiderstandsverhältnis von hochreinen Nb-Supraleitern für Kavitäten (IEC 61788-23:2024); Deutsche Fassung EN IEC 61788-23:2024

Overview

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 150 < rRRR < 600. The test method is valid for specimens with rectangular or roundcross-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. The standard differs from DIN EN IEC 61788-23 (VDE 0390-23):2023-06 as follows: a) the brief description has been amended in order to explain the test method described.