Split coil made of (RE)BCO pancake coils for IC(B) anisotropy measurements of superconductors

11th European Conference on Applied Superconductivity

Frolek, L.^1 ; Pardo, E.^1 ; Gömöry, F.^1 ; Souc, J.^1 ; Pitel, J.^1

Institute of Electrical Engineering, Slovak Academy of Sciences, Bratislava, Slovakia^1

关键词: Anisotropy measurements;    Coated conductors;    Number of turns;    Outer diameters;    Pancake coils;    Potential taps;    Second generation (2G);   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/507/1/012014/pdf
DOI  :  10.1088/1742-6596/507/1/012014

来源: IOP

【 摘 要 】

Measurement of the Ic(B) anisotropy is standard characterization of superconducting tapes, wires or cables. This contribution presents a split coil consisting on two superconducting pancake coils in order to generate the magnetic field necessary for this kind of measurement. Both coils were made using (RE)BCO-based second generation (2G) coated conductor tape with cross section 0.1 mm × 12 mm. The individual turns of the tape were insulated by a fiberglass tape without impregnation. These coils have identical inner and outer diameter and number of turns. Their inner and outer diameters are 50 mm and 80 mm, respectively, and they have 62 turns. The length of conductor in each coil is approximately 13 m. The distance between both pancake coils is 22 mm. Individual coils and the complete split coil were characterized in liquid nitrogen bath. Their parameters, like the critical currents, E(I) characteristics and magnetic field of complete split coil, were measured and interpreted. The split coil can be used up to magnetic fields of 210 mT. The length between the potential taps on the sample can be up to 20 mm, while the magnetic field decrease is lower than 1% on this length.