The Effect of Different Copper Discs on the Discharge of Superconducting Coils

doi:10.3390/cryst12081118

	The Effect of Different Copper Discs on the Discharge of Superconducting Coils
	Xia, Yajun 1,2,3; Song, Yuntao 1,2; Liu, Huajun 1,2; Lu, Zhen 4; Zheng, Jinxing 1,2; Liu, Fang 1,2; Song, Meng 3
刊名	CRYSTALS
	2022-08-01
卷号	12
关键词	HTS magnets quench protection discharge copper disc
DOI	10.3390/cryst12081118
通讯作者	Xia, Yajun(xiayajun@mail.ustc.edu.cn)
英文摘要	High temperature superconducting (HTS) magnets often work at high energy density and have slow quench propagation speed, so a quench will present a serious risk to the safety of magnets. The quench protection method based on the dump resistance can effectively reduce the current and release the energy in the HTS magnets. However, too large dump resistance may cause excessive voltage across the magnets. A quench protection system consisting of dump resistances and metal discs has been proposed. Copper discs are often embedded in HTS magnets for conducting cooling and mechanical support. In the discharging process of HTS magnets, the copper discs can absorb energy from the magnets through magnetic coupling, thus accelerating the current decay of the magnets. This quench protection method is more effective than using dump resistance alone. In this paper, the effect of different copper discs on the discharging process of HTS coils is discussed. Eight types of copper with different residual resistivity ratios (RRR) are applied. The results show that with the increase of the RRR of the copper disc, the current decay rate of the coil increases, and the energy absorbed by the copper disc from the coil increases. The role of different copper discs in the fast quench protection of the coil can be sorted as: RRR = 300 > RRR = 100 > RRR = 80 > RRR = 60 > RRR = 40 > RRR = 30 > RRR = 20 > RRR = 10. The copper disc with RRR of 300 shows the best performance in quench protection of HTS coils.
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences (CAS)[XDB25020200]
WOS关键词	QUENCH PROTECTION ; SYSTEM
WOS研究方向	Crystallography ; Materials Science
语种	英语
出版者	MDPI
WOS记录号	WOS:000846016300001
资助机构	Strategic Priority Research Program of the Chinese Academy of Sciences (CAS)
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131806]
专题	中国科学院合肥物质科学研究院
通讯作者	Xia, Yajun
作者单位	1.Chinese Acad Sci, Hefei Inst Phys Sci, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Grad Sch, Sci Isl Branch, Hefei 230026, Peoples R China 3.China Southern Power Grid Co Ltd, Joint Lab Power Superconducting Technol, Guangzhou 510080, Peoples R China 4.Shanghai Jiao Tong Univ, Sch Elect Informat & Elect Engn, Shanghai 200240, Peoples R China
推荐引用方式 GB/T 7714	Xia, Yajun,Song, Yuntao,Liu, Huajun,et al. The Effect of Different Copper Discs on the Discharge of Superconducting Coils[J]. CRYSTALS,2022,12.
APA	Xia, Yajun.,Song, Yuntao.,Liu, Huajun.,Lu, Zhen.,Zheng, Jinxing.,...&Song, Meng.(2022).The Effect of Different Copper Discs on the Discharge of Superconducting Coils.CRYSTALS,12.
MLA	Xia, Yajun,et al."The Effect of Different Copper Discs on the Discharge of Superconducting Coils".CRYSTALS 12(2022).