Thermal properties of a cylindrical YBa2Cu3Ox superconductor in a levitation system: triggered by nonlinear dynamics

doi:10.1088/0953-2048/29/7/075009

	Thermal properties of a cylindrical YBa2Cu3Ox superconductor in a levitation system: triggered by nonlinear dynamics
	Huang, Y; Zhang, XY; Zhou, YH; Zhang, XY (reprint author), Minist Educ China, Key Lab Mech Disaster & Environm Western China At, Lanzhou 730000, Gansu, Peoples R China.; Zhang, XY (reprint author), Lanzhou Univ, Coll Civil Engn & Mech, Dept Mech & Engn Sci, Lanzhou 730000, Gansu, Peoples R China.
刊名	SUPERCONDUCTOR SCIENCE & TECHNOLOGY
	2016-07
卷号	29 期号:7
关键词	levitation system nonlinear dynamics temperature spike
ISSN号	0953-2048
DOI	10.1088/0953-2048/29/7/075009
其他题名	Thermal properties of a cylindrical YBa2Cu3Oxsuperconductor in a levitation system: Triggered by nonlinear dynamics
文献子类	Article
英文摘要	The vibration of a permanent magnet (PM) levitated upon a high temperature superconductor (HTS) shows anomalous motion under external disturbance. In this paper we construct a cantilevered beam experimental setup composed of a bulk PM and a thermally insulated cylindrical YBa2Cu3Ox superconductor. When the levitation system is disturbed by vertical excitation, the thermal character of the superconductor surface could be measured directly. Our experiments on a clean and large single-domain superconductor show that a giant temperature spike appears once the levitated PM experiences period doubling oscillation. We develop a numerical simulation for the analysis of the nonlinear vibration of the levitated PM coupled with the nonlinear electromagnetic force between the PM and HTS, taking into account heat diffusion. Using this procedure, we explore the electromagnetic and thermal properties at the thermally insulated HTS surface when the levitated PM shows a period doubling vibration. We find a remarkable difference between the experimental results and simulation. In order to interpret this temperature difference, we suggest a type of flux motion triggered by the electromagnetic force when it is far larger than the pinning force of the superconductor. The quantitative approach is based on the analysis process of the partial flux jump as a result of the flux creep. Finally, the calculated result is shown to be very close to the experimental result.
学科主题	Physics
出版地	BRISTOL
资助项目	国家自然科学基金项目 ; 国家磁约束核聚变能发展研究专项 ; 国家重大科学仪器设备开发专项
项目编号	Fund of Natural Science Foundation of China [11202089] ; Innovative Research Group of the National Natural Science Foundation of China [11421062] ; National Key Project of Scientific Instrument and Equipment Development [11327802] ; National Program for Special Support of Top-Notch Young Professionals ; National Key Project of Magneto-Constrained Fusion Energy Development Program [2013GB110001, 2013GB110002]
语种	英语
WOS记录号	WOS:000378121300017
资助机构	NSFC ; MOST ; MOST
内容类型	期刊论文
源URL	[http://ir.lzu.edu.cn/handle/262010/182542]
专题	土木工程与力学学院_期刊论文
通讯作者	Zhang, XY (reprint author), Minist Educ China, Key Lab Mech Disaster & Environm Western China At, Lanzhou 730000, Gansu, Peoples R China.; Zhang, XY (reprint author), Lanzhou Univ, Coll Civil Engn & Mech, Dept Mech & Engn Sci, Lanzhou 730000, Gansu, Peoples R China.
推荐引用方式 GB/T 7714	Huang, Y,Zhang, XY,Zhou, YH,et al. Thermal properties of a cylindrical YBa2Cu3Ox superconductor in a levitation system: triggered by nonlinear dynamics[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2016,29(7).
APA	Huang, Y,Zhang, XY,Zhou, YH,Zhang, XY ,&Zhang, XY .(2016).Thermal properties of a cylindrical YBa2Cu3Ox superconductor in a levitation system: triggered by nonlinear dynamics.SUPERCONDUCTOR SCIENCE & TECHNOLOGY,29(7).
MLA	Huang, Y,et al."Thermal properties of a cylindrical YBa2Cu3Ox superconductor in a levitation system: triggered by nonlinear dynamics".SUPERCONDUCTOR SCIENCE & TECHNOLOGY 29.7(2016).