高温超导带材多场特性测试系统研制进展(Ⅰ)

Development of Multi Field Test System for High Temperature Superconducting Tapes

高温超导带材具有高的临界电流密度,高磁场下优异的载流特性以及良好的成型性在强电领域如高场磁体、超导电缆等方面应用潜力巨大。在其应用过程中,不可避免的低温-大电流-强磁场环境将对超导材料的载流能力产生影响,而加工过程中的残余应力以及洛伦兹力的存在会显著的降低超导材料的临界电流,造成相应超导装置功能性难以达到设计要求、且成为重要的安全隐患。本文介绍一种新型的适用于超导带材的力-磁-电多场耦合测试系统,该系统目前采用浸泡式制冷,可实现的主要功能有:(1)超导材料临界电流密度测试;(2)拉伸应变对超导带材临界电流的影响研究;(3)磁场对超导带材临界电流的影响研究;(4)力磁耦合情形下超导材料临界电流的变化规律;(5)超导材料磁通稳定性测试。该设备的成功研制将为我国先进超导材料研发提供基础测试平台。

High temperature superconducting tapes with high critical current density,excellent current carrying characteristics and good formability in high magnetic field have huge potential application in strong electromagnetic fields,such as high field magnets and superconducting cables.In its application process,the inevitable environment,such as low temperature,high current and strong magnetic field will impact current carrying capacity of superconducting material.The residual stress due to processing and existing Lorentz force can significantly reduce the critical current of superconducting material,resulting in the function of corresponding superconducting device is difficult to meet the design requirement,and even resulting in potential safety hazard.In this paper,a new type of force-magneto-electric multi field coupling test system is introduced.At present,this system adopts immersion type refrigeration,can achieve the main functions are：（1）the critical current density measurement of superconducting material;（2）the influence of tensile strain on the critical current density of superconducting tapes;（3）the influence of magnetic field on the critical current density of superconducting tapes;（4）the critical current variation of superconducting material subjected to force-magnetic coupling action;（5）superconducting material magnetic flux stability test.Successful development of this equipment will provide a basic testing platform for the research and development of advanced superconducting materials in our country.