Shock pressure and free surface velocity measurements in confined interaction — Response of new VF 2 /VF 3 piezoelectric gauges

To determine the peak pressure induced versus the incident intensity of a neodymium (Nd) glass pulsed laser, with a duration of 25 ns in glass confined geometry, two methods have been comparatively used. Free surface velocity measurements have been performed using an electromagnetic gauge. The resul...

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Bibliographic Details
Published in:Laser and particle beams 1996-06, Vol.14 (2), p.171-179
Main Authors: Boustie, M., Couturier, S., Romain, J.P., Zagouri, D., Simonnet, H.
Format: Article
Language:English
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Summary:To determine the peak pressure induced versus the incident intensity of a neodymium (Nd) glass pulsed laser, with a duration of 25 ns in glass confined geometry, two methods have been comparatively used. Free surface velocity measurements have been performed using an electromagnetic gauge. The results are compared with pressure measurements realized at the back of irradiated aluminum targets with the use of polyvinylidene fluoride (PVDF) gauges. Both diagnostics provide consistent results. The measurements of peak pressure as a function of laser irradiance are used to determine the calibration curve (current density versus loading pressure) for new VF 2 /VF 3 copolymer shock gauges used in this lasermatter interaction configuration. These experimental set-up deliver time resolved measurements that are interpreted by the shock-propagation phenomena.
ISSN:0263-0346
1469-803X
DOI:10.1017/S0263034600009927