Screening-current-induced mechanical strains in REBCO insert coils

doi:10.1088/1361-6668/ac0b2d

	Screening-current-induced mechanical strains in REBCO insert coils
	Yan,Yufan 4; Song,Peng 4; Xin,Canjie 1; Guan,Mingzhi 1; Li,Yi 2; Liu,Huajun 3; Qu,Timing 4
刊名	Superconductor Science and Technology
	2021-06-29
卷号	34 期号:8
关键词	REBCO coil screening current hoop strain high-field magnet
ISSN号	0953-2048
DOI	10.1088/1361-6668/ac0b2d
通讯作者	Guan,Mingzhi() ; Qu,Timing()
英文摘要	Abstract In recent years, remarkable progresses have been made in the R&D efforts for high temperature superconducting (HTS) high-field magnets. The screening-current-induced magnetic field and mechanical stress/strain in rare-earth barium-copper-oxide (REBCO) coils are raising growing concerns. This paper presents experimental and theoretical analyses on the effects of screening-current-induced mechanical strains in a REBCO insert setup without transport currents. Strain measurements on two REBCO coils, with and without over-banding structures, were carried out in an low temperature superconducting (LTS) background field magnet. Electromagnetic-mechanical models were developed, coupling the tilting angles of the superconducting tapes and the strain dependency of the critical current. The discrete-coupled model with turn-to-turn contacts, the discrete-sequential model and the block model were implemented and compared against the measured hoop strains. Combining experimental data with simulation models, it is shown that moderate over-banding structures are effective in providing reinforcements for the superconductors. A new method of edge-bonding was proposed and tested, which could reduce hoop strains in low applied fields but failed in higher fields. This work could be useful for the design and analysis of future high-field REBCO magnets.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:0953-2048-34-8-AC0B2D
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/137218]
专题	中国科学院近代物理研究所
通讯作者	Guan,Mingzhi; Qu,Timing
作者单位	1.Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China 2.Department of Mechanical Engineering, Advanced Manufacturing Institute, Texas Center for Superconductivity, University of Houston, Houston, TX 77204, United States of America 3.Heifei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China 4.State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, People’s Republic of China
推荐引用方式 GB/T 7714	Yan,Yufan,Song,Peng,Xin,Canjie,et al. Screening-current-induced mechanical strains in REBCO insert coils[J]. Superconductor Science and Technology,2021,34(8).
APA	Yan,Yufan.,Song,Peng.,Xin,Canjie.,Guan,Mingzhi.,Li,Yi.,...&Qu,Timing.(2021).Screening-current-induced mechanical strains in REBCO insert coils.Superconductor Science and Technology,34(8).
MLA	Yan,Yufan,et al."Screening-current-induced mechanical strains in REBCO insert coils".Superconductor Science and Technology 34.8(2021).