Experimental Techniques for Measuring the Critical Current in Superconducting Strands

Valentina Corato, Gianluca De Marzi, Chiarasole Fiamozzi Zignani, Luigi Muzzi, Rosario Viola, Antonio della Corte

Abstract

The characterization of the critical current Ic in superconducting NbTi and Nb3Sn strands is carried out through a four-probe technique. Besides the dependence on temperature and magnetic field, which can be measured with a standard Variable Temperature Insert, the Ic of Nb3Sn samples is also sensitive to axial strain. For this measurement, specially dedicated probes can be used, among them we recall the Walters spring insert. Both systems and corresponding experimental techniques are here described.

Keywords

Critical current, superconducting strands, strain, Walters spring

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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