8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-733-C7-736
Influence of plasma shielding in optoacoustic measurementsR. Hrovatin, J. Mozina and J. Diaci
University of Ljubljana, Faculty of Mechanical Engineering, Askerceva 6, P.O. Box 394, 61000 Ljubljana, Slovenia
Simultaneous measurements of laser excited ultrasonic waves in a solid sample and in the surrounding air were used for characterizing the plasma shielding effect and for the evaluation of its influence in optoacoustic measurements. Typical modifications of ultrasonic waves are discussed and the acoustic energy distribution between the solid and the atmosphere is assessed by a comparative analysis of optoacoustic responses received from both probes.
© EDP Sciences 1994