Shallow Embedded Strain Measurements and Analysis for a NbTi Superconducting Sextupole Coil During Cooling, Excitation, and Quench

doi:10.1007/s10948-018-4704-x

	Shallow Embedded Strain Measurements and Analysis for a NbTi Superconducting Sextupole Coil During Cooling, Excitation, and Quench
	Xin, Canjie; Guan, Mingzhi
刊名	JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
	2019-02-01
卷号	32 期号:2 页码:175-183
关键词	NbTi superconducting sextuple coil Shallow embedded resistance strain gauge Multi-stage strain monitoring FEM model with self-tested parameters Strain analysis
ISSN号	1557-1939
DOI	10.1007/s10948-018-4704-x
英文摘要	The present study deals with strain measurements and their numerical analysis for a niobium titanium wire wounded superconducting sextupole coil in a multi-field operation environment, including cooling down, excitation, and quench. Four low-temperature resistance strain gauges with designed compensation circuits were affixed directly on the surface of the superconducting wires but within glass fiber cloth. Before the sextuple coil's test was carried out, for the purpose of reliability, based on the designed compensation circuit, some basic experiments were carried out during cooling down, excitation, and quench. The experimental results showed that the shallow embedded low-temperature resistance strain gauges were still highly reproducible with an error of 1% for a variable magnetic field and an error of 5% for a variable thermal field by executing various modes. It shows multi-stage strain monitoring is feasible for the superconducting sextupole. In addition, a numerical multiphysics model for the sextuple coil is also built from Maxwell's equations and the equilibrium equations for mechanical and thermal deformation. A self-tested elastic modulus of NbTi/Cu stack with epoxy, which is cut from a NbTi/Cu sextupole prototype, at low temperature is used in this simulation. The numerical results have reasonable agreement with the experimental observations and show the multiphysics model with self-tested elastic modulus can be applied to analysis strain behaviors under complicated fields before superconducting magnet assembly. The present results will also provide some strain-measuring technology and multiphysics numerical analysis on an LTS/HTS superconducting magnet developed at the Institute of Modern Physics, Chinese Academy of Sciences (IMP, CAS).
资助项目	China Postdoctoral Science Foundation[2014M560820] ; China Postdoctoral Science Special Foundation[2015T81071]
WOS研究方向	Physics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000462985700007
资助机构	China Postdoctoral Science Foundation ; China Postdoctoral Science Special Foundation
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/133890]
专题	中国科学院近代物理研究所
通讯作者	Guan, Mingzhi
作者单位	Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Xin, Canjie,Guan, Mingzhi. Shallow Embedded Strain Measurements and Analysis for a NbTi Superconducting Sextupole Coil During Cooling, Excitation, and Quench[J]. JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM,2019,32(2):175-183.
APA	Xin, Canjie,&Guan, Mingzhi.(2019).Shallow Embedded Strain Measurements and Analysis for a NbTi Superconducting Sextupole Coil During Cooling, Excitation, and Quench.JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM,32(2),175-183.
MLA	Xin, Canjie,et al."Shallow Embedded Strain Measurements and Analysis for a NbTi Superconducting Sextupole Coil During Cooling, Excitation, and Quench".JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM 32.2(2019):175-183.