Measurement of the Jc inhomogeneity in HTS Bulks

Bruno Douine (1) , Kévin Berger (1) , Mohamed Elbaa (1, 2)

1 GREEN - Groupe de Recherche en Energie Electrique de Nancy
2 LESI - Laboratoire de l'Energie et des Systèmes Intelligents

The characterization method of High Temperature Superconducting (HTS) bulks developed by GREEN lab described in previous papers is based on the measurement of the complete penetration magnetic field BP. This characterization method allows determining the critical current density JC and the n-value of the power law. The Jc inhomogeneity in axial and radial directions has to be taking account in the process of characterization. Especially the position of the hall sensors related to the seed of HTS bulk is very important and is studied and described in this paper. Many experiments were made to demonstrate this and numerical simulations were developed at the same time to validate theoretical deductions. This work should be a real improvement for the characterization of superconducting bulks.

Domaines: Electromagnétisme; Supraconductivité [cond-mat.supr-con]; Science des matériaux [cond-mat.mtrl-sci]; Energie électrique

Bruno Douine, Kévin Berger, Mohamed Elbaa. Measurement of the Jc inhomogeneity in HTS Bulks. EUCAS 2019 - 14th European Conference on Applied Superconductivity, Sep 2019, Glasgow, United Kingdom. p. 177, id. 3-MP-FP5-S16. ⟨hal-02296703⟩