Nb_3Sn超导线应变下临界电流实验研究  

STUDY ON CRITICAL CURRENT VERSUS AXIAL STRAIN MEASUREMENTS FOR Nb_3Sn STRAND

作　　者：刘方[1] 刘华军[1] 龙风[1] 刘勃[1] 

机构地区：[1]中国科学院等离子体物理研究所,合肥230031

出　　处：《低温物理学报》2013年第5期355-359,共5页Low Temperature Physical Letters

基　　金：中国科学院合肥物质科学研究院知识创新工程领域前沿项目(批准号:Y05FCQ1122)资助的课题

摘　　要：根据Nb3Sn超导线临界性能与应变的强依赖关系,中科院等离子体物理研究所(ASIPP)通过与荷兰Twente大学合作,研制了一种应变-临界电流测试系统.该系统提供的磁场范围为0至15T,温度为4.2K至20K,应变为-0.7%至0.6%.为验证实验系统的可行性,我们对已在荷兰Twente大学测试过的Nb3Sn超导线进行了测试.本文对该应变实验装置以及Nb3Sn超导线实验进行了介绍.并结合偏应变模型对超导线实验结果进行了分析,通过与荷兰Twente大学实验结果进行比较,验证了实验系统的可行性.Nb3 Sn is a brittle A15 compound superconductor with strain sensitive superconducting properties. In cooperation with the University of Twente （UT）, the Institute of Plasma Physics Chinese Academy of Sciences （ASIPP） built a facility practically similar to the so called ＇Pacman＇ spring device to characterize superconducting behavior versus axial strain. The spring allows measurement of the voltage current characteristic of a. Nb3 Sn strand are over a wide range of applied axial strain, magnetic field, temperature and currents. In the process of vali- dating the new setup, a strand, which has also been measured at the UT, is tested with the ASIPP Pacman. The critical currents were then used to derive the superconducting and deformation-related parameters of the so-called de- viatoric strain model. This publication describes in detail the structure of the Pacman device and its calibrations, the experimental process and a comparison of the results.

关 键 词：应变 临界电流 NB3SN 

分 类 号：TM26[一般工业技术—材料科学与工程]