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Screening-current-induced mechanical strains in REBCO insert coils

文献类型：期刊论文

作者Yan,Yufan4; Song,Peng4; Xin,Canjie1; Guan,Mingzhi1; Li,Yi2; Liu,Huajun3; Qu,Timing4
刊名Superconductor Science and Technology
出版日期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
DOI10.1088/1361-6668/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
WOS记录号IOP:0953-2048-34-8-AC0B2D
出版者IOP Publishing
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).

入库方式： OAI收割

来源：近代物理研究所

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