Degradation mechanism of the superconducting performance of a Bi2212 cable under magnetic fields

doi:10.1088/1361-6668/ac4ad2

	Degradation mechanism of the superconducting performance of a Bi2212 cable under magnetic fields
	Zhang, Zhen-Chuang 1,2; Yang, Dong-Sheng 1,2; Zhou, Hai-Shan 2; Qin, Jing-Gang 2; Luo, Guang-Nan 2
刊名	SUPERCONDUCTOR SCIENCE & TECHNOLOGY
	2022-03-01
卷号	35
关键词	superconducting materials Bi2212 superconductors cable CICC CFETR
ISSN号	0953-2048
DOI	10.1088/1361-6668/ac4ad2
通讯作者	Qin, Jing-Gang(qinjg@ipp.ac.cn)
英文摘要	In magnetic confinement fusion reactors, superconducting magnet systems are essential for generating and controlling high magnetic fields. To increase the magnetic field, new superconducting materials such as Bi2212 (Bi2Sr2CaCu2O8+x ) have been selected in the design of magnet systems. However, the stability of the Bi2212 superconductor under magnetic fields must be studied for the routine and safe operation of magnet systems. In this work, the stability and degradation mechanism of a Bi2212 cable under magnetic fields were investigated. With a magnetic field of 5.8 T, the cable carrying 29 kA was exerted with a force of similar to 168.2 kN m(-1). In the core area of the cable, moved wires were detected by computed tomography. The macroscopic movement of the wires would vary with the axial position, which could be related to the twist structure. Then, the cable was decomposed, and the acquired wires were tested under 12 T at 4.2 K by four-probe method. The results indicated that the inner wires had relatively lower critical currents, which should be the reason for the degradation of cable performance. Scanning electron microscope images of the superconducting phase within the wires confirmed that cracks existed in the superconducting phase of the inner wires, while intact crystals were found in that of the outer wires. The variation in microstructures gave rise to changes in the wire performance.
资助项目	National Natural Science Foundation of China[U2032216] ; National Key R&D Program of China[2017YFE0301404] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB25000000]
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000745316600001
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/127335]
专题	中国科学院合肥物质科学研究院
通讯作者	Qin, Jing-Gang
作者单位	1.Univ Sci & Technol China, Hefei, Anhui, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhen-Chuang,Yang, Dong-Sheng,Zhou, Hai-Shan,et al. Degradation mechanism of the superconducting performance of a Bi2212 cable under magnetic fields[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2022,35.
APA	Zhang, Zhen-Chuang,Yang, Dong-Sheng,Zhou, Hai-Shan,Qin, Jing-Gang,&Luo, Guang-Nan.(2022).Degradation mechanism of the superconducting performance of a Bi2212 cable under magnetic fields.SUPERCONDUCTOR SCIENCE & TECHNOLOGY,35.
MLA	Zhang, Zhen-Chuang,et al."Degradation mechanism of the superconducting performance of a Bi2212 cable under magnetic fields".SUPERCONDUCTOR SCIENCE & TECHNOLOGY 35(2022).