介绍了一种新的高 Tc SQUID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. 本文利用涡流技术和该装置可以探测到板厚为2 mm的无磁多层铝锂合金板中40 mm×4 mm×2 mm的模拟缺陷, 这远远大于常规涡流无损检测的深度.
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