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Observing laser material interactions with acoustic emission

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Abstract

Acoustic emission (AE) offers the possibility of observing the dynamic aspect of deformation on the micromechanism level. It is a passive monitoring method and depends entirely on redistribution of stresses within the sample of structure to provide the excitation function. It will be shown that AE is generated when solids are irradiated by fluxes of electromagnetic energy with low Intensity and that one of the simplest observable effects is that of light pressure at low fluxes. An electromagnetic wave with 1-J energy gives a sample a momentum of ~10−4 dyn sec.

© 1981 Optical Society of America

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