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Thermal-pulse tomography of polarization distributions in a cylindrical geometry

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6 Author(s)
R. F. Suarez ; Dept. of Phys., Univ. of Potsam, Potsdam ; A. Mellinger ; M. Wegener ; W. Wirges
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Fast, three-dimensional polarization mapping in piezoelectric sensor cables was performed by means of the novel thermal-pulse tomography (TPT) technique with a lateral resolution of 200 mum. The active piezoelectric cable material (a copolymer of polyvinylidene fluoride with trifluoroethylene) was electrically poled with a point-to-cable corona discharge. A focused laser was employed to heat the opaque outer electrode, and the short-circuit current generated by the thermal pulse was used to obtain 3D polarization maps via the scale transformation method. The article describes the TPT technique as a fast non-destructive option for studying cylindrical geometries

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IEEE Transactions on Dielectrics and Electrical Insulation  (Volume:13 ,  Issue: 5 )