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Experimental and numerical results of electromagnetic nondestructive testing with HTc SQUIDS

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5 Author(s)
Ruosi, A. ; Dip. di Sci. Fisiche, Naples Univ., Italy ; Pepe, G. ; Peluso, G. ; Valentino, M.
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We present here recent results on detection of surface and subsurface artificial features in Al-Ti planar structures, to show current performance of our eddy-current nondestructive evaluation system based on HTc SQUIDs. The anomalous magnetic fields generated by flaws with known electromagnetic characteristics have been modeled by three-dimensional codes based on finite element method and volume integral formulation and developed for the investigated problem. Both numerical solutions have correctly predicted the shape of the complicated magnetic field response which is mainly the result of the shape of the defect, the geometry of the inducing coil and the characteristics of the SQUID gradiometer.

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Applied Superconductivity, IEEE Transactions on  (Volume:9 ,  Issue: 2 )