COMPARATIVE ANALYSIS OF DETERMINATION RESULTS THE PARAMETERS OF CU / NON CU, OBTAINED BY DIFFERENT METHODS IN Nb3Sn SUPERCONDUCTORS FOR ITER
The paper presents the results of a comparative analysis of different methods (quantitative metallographic analysis, the weighting method, the electrical resistivity, eddy current method) the definition of the volume fraction of the stabilizing copper as part of multifilament Nb3Sn composite superconductors for International Research Thermonuclear Experimental Reactor (ITER). The ratio of Cu / non Cu is one of the major controllable parameters in the commercial release of superconductors. The distribution of values of the parameter Cu / non Cu along the length of the samples Nb3Sn strands. The recommendations on the use of different methods of determining the parameter Cu /non Cu, both of «VNIINM», and in the industrial manufacture of strands on the «CMP» (fig. - 9, tables - 4, references - 7)