HT_C SQUID磁强计在无损检测上的应用  

Application of High Temperature Superconducting DC SQUID Magnetometer on Nondestructive Testing

作　　者：王俊平[1,2,3] 陈烈[1,2,3] 陈珂[1,2,3] 吴培钧 陈岚峰 古宏伟 袁冠森[1,2,3] 

机构地区：[1]中国科学院物理研究所凝聚态物理中心 [2]北京有色金属研究总院超导中心 [3]河北工业大学应用数理系

出　　处：《低温与超导》1999年第2期21-28,共8页Cryogenics and Superconductivity

摘　　要：介绍了一种新的高ＴＣＳＱＵＩＤ无损检测装置和它的应用。ＳＱＵＩＤ位于金属杜瓦真空夹层中，既保护了ＳＱＵＩＤ，又减小了被测物体与探头之间的距离，同时提高了系统的分辨率。我们利用涡流技术和该装置可以探测到板厚为２ｍｍ的无磁多层铝锂合金板中４０×２×２ｍｍ３的模拟缺陷。A new kind of SQUID NDT apparatus and its application have been described in this paper. SQUID is positioned in the vacuum between inner and outer skin of metal dewar. This design not only prevents SQUID from vapour and contamination but also reduces the distance between SQUID probe and object while it also improves the resolution of the system. We detected a simulated flaw of 40×2×2mm 3 in the nonferromagnetic multi-layers of Al-Li plate with 2 mm in thickness using the apparatus and eddy current technology.

关 键 词：高温超导体 磁强计 涡流 无损探测装置 SQUID 

分 类 号：TH878.3[机械工程—仪器科学与技术] TM936.1[机械工程—精密仪器及机械]