Title :
Experimental and numerical results of electromagnetic nondestructive testing with HTc SQUIDS
Author :
Ruosi, A. ; Pepe, G. ; Peluso, G. ; Valentino, M. ; Monebhurrun, V.
Author_Institution :
Dip. di Sci. Fisiche, Naples Univ., Italy
fDate :
6/1/1999 12:00:00 AM
Abstract :
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.
Keywords :
SQUID magnetometers; eddy current testing; flaw detection; high-temperature superconductors; AlTi; SQUID gradiometer; SQUIDS; anomalous magnetic fields; eddy-current nondestructive evaluation; electromagnetic nondestructive testing; flaws; magnetic field response; subsurface artificial features; surface artificial features; three-dimensional codes; volume integral formulation; Character generation; Coils; Electromagnetic fields; Electromagnetic modeling; Finite element methods; Geometry; Integral equations; Magnetic fields; SQUIDs; Shape;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
