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Article Dans Une Revue IEEE Transactions on Applied Superconductivity Année : 2012

Enhancement of the E(J, B) power law characterization for superconducting wires from electrical measurements on a coil

Résumé

We propose an original method for the characterization of superconducting tapes and wires from electrical measurements on a test coil. The principle is to measure the voltage-current characteristic of a coil for several values of the external applied flux density. A computer program then allows finding parameters of a model of the E(J, B) law that best fit the experimental curves. A numerical study on the algorithm convergence and on the accuracy of results was performed. This method has been employed experimentally to characterize a BiSCCO tape. Parameters of three different models have been obtained and compared. This process has several advantages compared to the conventional measurements on short samples: the voltage to noise ratio is higher and the self flux density of the coil is taken into account. Two models that fits well experimental curves were found.
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Dates et versions

hal-00606265 , version 1 (05-07-2011)
hal-00606265 , version 2 (28-09-2011)
hal-00606265 , version 3 (24-11-2011)

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Julien Leclerc, Kévin Berger, Bruno Douine, Jean Lévêque. Enhancement of the E(J, B) power law characterization for superconducting wires from electrical measurements on a coil. IEEE Transactions on Applied Superconductivity, 2012, 22 (3), pp.6400504. ⟨10.1109/TASC.2011.2179840⟩. ⟨hal-00606265v3⟩
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