基于分体式超导磁体结构的应变测量实验研究  

Experimental study on strain measurement based on a split superconducting magnet structure

作　　者：张永杰 辛灿杰[2,3] 何天虎 关明智[2,3] Zhang Yongjie;Xin Canjie;He Tianhu;Guan Mingzhi(School of Science,Lanzhou University of Technology,Lanzhou 730050,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Guangdong Provincial Laboratory of Advanced Energy Science and Technology,Huizhou 516000,China)

机构地区：[1]兰州理工大学理学院,兰州730050 [2]中国科学院近代物理研究所,兰州730000 [3]先进能源科学与技术广东省实验室,惠州516000

出　　处：《低温与超导》2023年第5期15-21,55,共8页Cryogenics and Superconductivity

基　　金：国家自然科学基金(12172357);中国科学院青年创新促进会(2019404);甘肃省自然基金重点项目(2022-22JR5RA127);广东省基础与应用基础研究基金联合基金重点项目(2022B1515120051)资助。

摘　　要：基于低温电阻应变片和单模光纤应变测量原理,搭建了针对极端环境下光-电综合应变测量系统,开展了极低温-电磁场环境下5 T分体式超导磁体结构力学测量的实验研究,得到了超导磁体从降温、励磁(失超)到回温全过程的应变测量结果与演化规律等。结果表明:在5 T分体式超导磁体运行的全过程中,运用该应变测量系统可以实现极端低温环境下高精度的应变测量,与传统单点式测量技术不同,发展的二维分布式应变测量技术可直观的观察到磁体在测试过程中结构的全局变化。Using low temperature resistive strain gauges and single mode fibre optic,an integrated optical-electrical strain measurement system was developed.Based on the strain measurement system,the mechanical behavior of a NbTi 5T split superconducting magnet under cryogenic temperature and intense magnetic field was carried out.The strains and their changes were recorded during full life cycle of the superconducting magnet,including cooling down,excitation(quench)and warming up.The results show the integrated optical-electrical strain measurement system can work well for the extreme operation of the superconducting magnet,different from the traditional single-point strain measurement,developed two-dimensional strain measurements can also help to detect global strain in structure,which cannot be carried out only using resistance strain gauges.

关 键 词：电阻应变片 单模光纤 低温-电磁场环境 超导磁体结构 分布式应变测量 

分 类 号：O514[理学—低温物理]