Abstract
An apparatus to evaluate the strain effect of critical current, Ic, in practical superconducting wires was fabricated. The apparatus was installed in the 16.5 T superconducting magnet of High Field Laboratory for Superconducting Materials, Tohoku University. Total length of a specimen is 44 mm. Each end of it is soldered to a copper grip which also serves as a current terminal. The load is applied by moving the lever arm. The strain is measured by use of a extensometer set between the movable grip and the fixed one. The accuracy is 0.05 % strain. The voltage taps are soldered at a distance of 10 mm. The capacities in load and current of the apparatus are 500 N and 200 A, respectively. A good operation is confirmed by comparing results with those in the conventional apparatus. Reasonable agreement with the data obtained at NIST in VAMAS international round robin test samples gave a proof for reliability on the apparatus. Using this apparatus, strain characteristics of a wire fabricated by liquid infiltration method is evaluated.
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© 1990 Plenum Press, New York
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Katagiri, K. et al. (1990). An Apparatus for Evaluating Strain Effect of Critical Current in Superconducting Wires in Magnetic Fields up to 16.5 T. In: Reed, R.P., Fickett, F.R. (eds) Advances in Cryogenic Engineering Materials . An International Cryogenic Materials Conference Publication, vol 36. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-9880-6_9
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DOI: https://doi.org/10.1007/978-1-4613-9880-6_9
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