WB-P-12
Investigation of the quench propagation properties of iron-based superconducting tapes with various sheath materials
16:45-18:15 29/11/2023
*Chunyan Li1, Rui Kang1, Jin Zhou1, Yanchang Zhu2, Ling Zhao1, Yingzhe Wang1, Chengtao Wang1, Juan Wang1, Xianping Zhang2, Dongliang Wang2, Fang Liu3, Yanwei Ma2 and *Qingjin Xu1
1. Accelerator Division, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
2. Key Laboratory of Applied Superconductivity, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
3. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
The iron-based superconductors are promising materials in the fields of high-field magnets [1-3]. The stability of iron-based superconducting (IBS) tapes is crucial for their practical applications, however, research in this field is still relatively limited [4, 5]. Considering that the electrical, thermal, and mechanical properties of IBS tapes vary significantly with different sheath materials, the thermal-electrical stability of the IBS coils during operation or quench should be different. In this work, we have successfully developed a conduction cooling system to test the quench propagation characteristics of the IBS tapes and coils. This system can achieve various functions, such as charging test, temperature & voltage data acquisition, pulse current heating, quench detection & protection, and strain monitoring. We selected three types of BaxK1-xFe2As2(Ba122) tapes with different sheath materials that presently exhibit superior performance for testing. The three sheath materials are Ag/AgSn, Ag/Cu, and Ag/Stainless Steel. We have tested the quench characteristics of the above IBS tapes under different temperatures and different ratios of operating current to critical current (Iop/Ic). Key performance parameters such as quench propagation velocity (NZPV) and minimum quench energy (MQE) were obtained. This is the first comparative analysis of the influence of different sheath materials on the quench propagation parameters of IBS tapes with the same superconducting core. This study will provide references for the practical application and quench protection of IBS tapes based on specific application requirements.
[1] Xu Q et al 2015 Magnetic Design Study of the High-Field Common-Coil Dipole Magnet for High-Energy Accelerators IEEE Trans. Appl. Supercond. 25 4000905
[2] Yao C and Ma Y 2019 Recent breakthrough development in iron-based superconducting wires for practical applications Supercond. Sci. Technol. 32 023002
[3] Yao C and Ma Y 2021 Superconducting materials: Challenges and opportunities for large-scale applications iScience 24 102541
[4] Liu Q and Liu Z 2016 Quench Behaviors of Monofilament Iron-Based Sr0.6K0.4Fe2As2 Tape with Ag sheath at different Temperatures IEEE Trans. Appl. Supercond. 26 7300406
[5] Ding H and Ma Y 2021 Numerical and Experimental Analysis of Quench Behaviors in Iron‑Based Sr/Ba122 Superconducting Tape at Liquid Helium Temperature Journal of Superconductivity and Novel Magnetism 34:2011–2016
The work is supported in part by the National Key R&D Program of China (Grant Nos. 2018YFA0704203), by the Strategic Pri-ority Research Program of the Chinese Academy of Sciences (Grant Nos. XDB25000000), and by the National Natural Science Foundation of China (Grant Nos. 12205319)
