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Shock pressure and free surface velocity measurements in confined interaction — Response of new VF2/VF3 piezoelectric gauges

Published online by Cambridge University Press:  09 March 2009

M. Boustie ,
S. Couturier ,
J.P. Romain ,
D. Zagouri  and
H. Simonnet
M. Boustie
Affiliation:
Laboratoire de Combustion et de Détonique, U.P.R. du C.N.R.S. n° 9028, E.N.S.M.A, Site du Futuroscope, Chasseneuil du Poitou, B.P. 109, 86960 Futuroscope Cédex, France
S. Couturier
Affiliation:
Laboratoire de Combustion et de Détonique, U.P.R. du C.N.R.S. n° 9028, E.N.S.M.A, Site du Futuroscope, Chasseneuil du Poitou, B.P. 109, 86960 Futuroscope Cédex, France
J.P. Romain
Affiliation:
Laboratoire de Combustion et de Détonique, U.P.R. du C.N.R.S. n° 9028, E.N.S.M.A, Site du Futuroscope, Chasseneuil du Poitou, B.P. 109, 86960 Futuroscope Cédex, France
D. Zagouri
Affiliation:
Laboratoire de Combustion et de Détonique, U.P.R. du C.N.R.S. n° 9028, E.N.S.M.A, Site du Futuroscope, Chasseneuil du Poitou, B.P. 109, 86960 Futuroscope Cédex, France
H. Simonnet
Affiliation:
Laboratoire de Combustion et de Détonique, U.P.R. du C.N.R.S. n° 9028, E.N.S.M.A, Site du Futuroscope, Chasseneuil du Poitou, B.P. 109, 86960 Futuroscope Cédex, France
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Abstract

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 VF2/VF3 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.

Type
Research Article
Information
Laser and Particle Beams , Volume 14 , Issue 2 , June 1996 , pp. 171 - 179
Copyright
Copyright © Cambridge University Press 1996

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References

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