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Techniques and methods

Analysis of ultrasonic echoes induced by pulsed laser action on an iron film in a diamond anvil cell

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Pages 78-82 | Received 11 Sep 2009, Published online: 17 Mar 2010
 

Abstract

The results of laser ultrasonic experiments with iron film under high pressure are described. In addition to skimming and bulk acoustic modes observed and analyzed in a previous study [1], the detection of “mixed modes” or head waves is reported. For these modes, the acoustic disturbance propagates along a part of its ray trajectory between the excitation and detection point as a skimming wave on the diamond/iron interface and along another part of its ray trajectory as a bulk wave in iron. Experimentally measured arrival times of the head waves were found to be in a good agreement with the theory.

Acknowledgement

This work was supported by US Department of Energy Grant No. DE-FG02-07ER46408.

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