Model-less characterization of superconducting tapes or wires from electrical measurements on a coil - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2014

Model-less characterization of superconducting tapes or wires from electrical measurements on a coil

Résumé

In previous works we presented an original method for the characterization of superconducting tapes and wires from electrical measurements on a test coil. The principle was to measure the voltage-current characteristics of a coil for several values of an external applied flux density (by permanent magnets). A computer program then allows finding parameters of a model of the E(J,B) law that best fit the experimental curves.The advantage of this method is to obtain the characteristics of the superconductor in its future conditions of use i.e. it is wound. However, the use of a model requires having an a priori knowledge about its behavior. We present here how we modified this method in order to avoid the use of a model. The characteristics are adjusted point-by-point and a linear interpolation is performed between each of them. The increase in the number of parameters to determine led us to use a simulated annealing algorithm to perform minimization. The obtained results (Jc(B) and n(B) characteristics) are consistent with measurements made previously. However, a slight degradation of the characteristics is observed at very low magnetic fields. This behavior is, so far, not yet explained.
Fichier non déposé

Dates et versions

hal-01025135 , version 1 (17-07-2014)

Identifiants

  • HAL Id : hal-01025135 , version 1

Citer

Julien Leclerc, Kévin Berger, Jean Lévêque, Bruno Douine. Model-less characterization of superconducting tapes or wires from electrical measurements on a coil. ASC 2014 - Applied Superconductivity Conference, Aug 2014, Charlotte, North Carolina, United States. page 81/1LOr3D-03. ⟨hal-01025135⟩
61 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More