[14a-P4-1~41] 11 Superconductivity（Poster）

[14a-P4-19] Detection of backside cracks in steel plate by low-frequency eddy current testing technique using HTS-SQUID

〇Akira Tsukamoto¹, Tsunehiro Hato¹, Seiji Adachi¹, Yasuo Oshikubo¹, Weiying Cheng², Keiji Enpuku³, Keiji Tsukada⁴, Keiichi tanabe¹ (1.SUSTERA, 2.JAPEIC, 3.Kyushu Univ., 4.OkayamaUniv.)

Keywords:HTS-SQUID, non-destructive evaluation, eddy current testing

Low-frequency eddy current testing technique using a double D-shape excitation coil and planear HTS detection coil coupled with an HTS-SQUID is applied to detection of backside cracks in steel plate. The magnetic field pattern corresponding to eddy current flow arround a location of the backside crack can be observed, indicating a successful detection of backside crack in the steel plate.