Enhancement of laser-ultrasound/electromagnetic-acoustic transducer signals from Rayleigh wave interaction at surface features

Boonsang, S.; Dewhurst, R. J.
May 2003
Applied Physics Letters;5/12/2003, Vol. 82 Issue 19, p3348
Academic Journal
The enhancement of signals from Rayleigh wave interaction at solid surface features is described, for the case when signals arise from laser-ultrasound/electromagnetic-acoustic transducer (EMAT) detection system. Transient surface acoustic waves were detected by an in-plane EMAT receiver. B-scan images from surface slot or surface edge interactions revealed increased signal amplitude from these features of a factor ∼1.59. An explanation is based on the interaction of the EMAT sensor with the Rayleigh wave.


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