First performance test of 30 mm iron-based superconductor single pancake coil under 24 T background field

Abstract

The iron-based superconductor (IBS) single pancake coil (SPC) with 30 mm inner diameter was firstly fabricated and tested under 24 T background field. This SPC was successfully made using the 7-filamentary Ba1-xKxFe2As2 (Ba122) tape by wind-and-react method. This IBS coil show the highest Ic value at magnetic field reported so far. For example, the transport critical current of this Ba122 SPC achieved 35 A at 4.2 K and 10 T, which is about half of that of short sample. This indicates that the non-insulation winding process together with the stainless-steel tape is suitable to the iron-based superconductor. Even more encouraging is the fact that the Ic of this SPC is still as high as 26 A under 24 T background field, which is still about 40% of that at zero external magnetic field. These results clearly demonstrate that the iron-based superconductors are very promising for high-field magnet applications.

arXiv comment16 pages, 3 figures

References in corpus (4)

• Recent advances in iron-based superconductors toward applications
• High intergrain critical current density in fine-grain (Ba0.6K0.4)Fe2As2 wires and bulks
• Realization of practical level current densities in Sr0.6K0.4Fe2As2 tape conductors for high-field applications
• Fabrication and Transport Properties of 100 m Class Sr0.6K0.4Fe2As2 Wires and Pancake Coils

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