A high-Tc SQUID micro-detector with a high performance magnetic shield for contaminant detection in industrial products
A high-Tc SQUID micro-detector with a high performance magnetic shield for contaminant detection in industrial products
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具有高性能磁屏蔽的高温 SQUID 微型探测器，用于工业产品中的污染物检测
DOI：
10.1088/0953-2048/20/11/s16
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发表时间：
2007
影响因子：
3.6
通讯作者：
T. Nagaishi
中科院分区：
文献类型：
--
作者：
Saburo Tanaka;H. Fujita;Y. Hatsukade;T. Otani;S. Suzuki;T. Nagaishi
研制了一种用于检测工业产品中磁性异物的高温超导量子干涉装置。有可能是超微小的金属异物意外混入了锂离子电池等工业产品中。外径小于100微米的金属颗粒无法通过常规的X射线成像进行检测。为此，我们开发了一种基于高性能磁屏蔽的高T_c SQUID显微镜的检测系统。建议使用带有0.5 mm厚真空窗口的鱿鱼显微镜。这种设计使鱿鱼能够接近被测物体，接近1毫米，并提高了灵敏度。精心设计和制造了一种新型带套筒的磁屏蔽。结果，我们可以成功地测量出尺寸为100微米的小颗粒，这是传统的X射线检测方法难以达到的检测水平。
A high-Tc superconducting quantum interference device (SQUID) system for the detection of magnetic foreign matter in industrial products was developed. There is a possibility that ultra-small metallic foreign matter has been accidentally mixed with industrial products such as lithium ion batteries. Metallic particles with outer dimensions less than 100 µm cannot be detected by conventional x-ray imaging. Therefore we developed a detection system based on a high-Tc SQUID microscope with a high performance magnetic shield. The use of SQUID microscopes with a 0.5 mm thick vacuum window was proposed. This design enables the SQUID to approach the object to be measured as close as 1 mm and enhances the sensitivity. A new magnetic shield with sleeves was carefully designed and built. As a result, we could successfully measure small particles sized 100 µm. This detection level was hard to achieve using a conventional x-ray detection method.