IEC/TC90における超電導材料の測定方法の標準化に関する取組み

抄録

Activity on the international standardization of the test methods for industrial superconductors is introduced, which is authorized by IEC/TC90 (Superconductivity). A brief history and strategy of the organization are explained. The substantial work involved to discuss and prepare the draft for each item is left to the respective international working group. At present, 8 working groups cover the field of superconductivity and related properties; terminology, critical current, residual resistance ratio, copper ratio, mechanical property and surface resistance. One of them, the test method of critical current for Cu/Nb-Ti composite superconductors, will soon be published as an international standard. The domestic activity in Japan supporting international standardization is supervised by the Japanese National Committee of IEC/TC90. The mission of the JNC is the following three activities; support of the international activity as a secretary country, translation of international standards to JIS and supervision of domestic activities. The actual test methods are proposed and carried out by the New Materials Center and Japanese Fine Ceramics Association. It is emphasized that establishing good liaison with groups such as VAMAS concerning the fundamental aspects of standardization is crucial to promote effective international collaboration.