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Homepage>BS Standards>17 METROLOGY AND MEASUREMENT. PHYSICAL PHENOMENA>17.220 Electricity. Magnetism. Electrical and magnetic measurements>17.220.20 Measurement of electrical and magnetic quantities>BS EN 61788-12:2013 Superconductivity Matrix to superconductor volume ratio measurement. Copper to non-copper volume ratio of Nb<sub>3</sub>Sn composite superconducting wires
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BS EN 61788-12:2013 Superconductivity Matrix to superconductor volume ratio measurement. Copper to non-copper volume ratio of Nb<sub>3</sub>Sn composite superconducting wires

BS EN 61788-12:2013

Superconductivity Matrix to superconductor volume ratio measurement. Copper to non-copper volume ratio of Nb<sub>3</sub>Sn composite superconducting wires

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Standard number:BS EN 61788-12:2013
Pages:32
Released:2013-10-31
ISBN:978 0 580 75669 6
Status:Standard
DESCRIPTION

BS EN 61788-12:2013


This standard BS EN 61788-12:2013 Superconductivity is classified in these ICS categories:
  • 17.220.20 Measurement of electrical and magnetic quantities
  • 29.050 Superconductivity and conducting materials
IEC 61788-12:2013 describes a test method for determining the copper to non-copper volume ratio of Cu/Nb 3Sn wires. The test method given hereunder is applicable to Nb 3Sn composite superconducting wires with a cross-sectional area of 0,1 mm 2 to 3,0 mm 2 and a copper to non-copper volume ratio of 0,1 or more. It does not make any reference to the filament diameter; however, it is not applicable to those superconducting wires with their filament, Sn, Cu-Sn alloy, barrier material and other non-copper portions dispersed in the copper matrix or those with the stabilizer dispersed. Furthermore, the copper to non-copper volume ratio can be determined on specimens before or after the Nb 3Sn formation heat treatment process. The Cu/Nb 3Sn wire has a monolithic structure with a round or rectangular cross-section. Though uncertainty increases, this method may be applicable to the measurement of the copper to non-copper volume ratio of the Cu/Nb 3Sn wires whose cross-section and copper to non-copper volume ratio fall outside the specified ranges. This test method may be applied to other composite superconducting wires after some appropriate modifications. This second edition cancels and replaces the first edition published in 2002. It constitutes a technical revision. The main revision is the addition of two new annexes, "Uncertainty considerations" and "Uncertainty evaluation in the test method of the copper to non-copper volume ratio of Nb 3Sn composite superconducting wires".