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

Dongliang Wang; Zhan Zhang; Xianping Zhang; Donghui Jiang; Chiheng Dong; He Huang; Wenge Chen; Qingjin Xu; Yanwei Ma

doi:10.1088/1361-6668/ab09a4

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arXiv · 1903.07960

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

Dongliang Wang·Zhan Zhang·Xianping Zhang·Donghui Jiang·Chiheng Dong·He Huang·Wenge Chen·Qingjin Xu·Yanwei Ma

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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.

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Dongliang Wang, Zhan Zhang, Xianping Zhang, Donghui Jiang, Chiheng Dong, He Huang, Wenge Chen, Qingjin Xu, Yanwei Ma. 2019-03-19. First performance test of 30 mm iron-based superconductor single pancake coil under 24 T background field. https://doi.org/10.1088/1361-6668/ab09a4

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