SQUIDを用いた非破壊検査装置の開発

概要

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We developed a non-destructive evaluation system consisting of (1) a SQUID integrated with a gradiometer and (2) a cryostat. Since the cryostat contains a thin vacuum space in order to provide high spatial resolultion and reduce background noise, the system was used in an unshielded environment. It was found that the system could defect a change in magnetization due to applied stress in SUS304. Simulated subsurface flaws in an aluminum plate were also detected, using an eddy current technique. These results confirmed that the system has high sensitivity and spatial resolution.
社団法人日本磁気学会の論文
1998-04-15