J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 457-459
Laser absorption and energy transfer in foams of various pore structures and chemical compositionsJ. Limpouch1, 2, N.G. Borisenko3, N.N. Demchenko3, S.Yu. Gus'kov3, A. Kasperczuk4, A.M. Khalenkov3, V.N. Kondrashov5, E. Krousky2, J. Kuba1, K. Masek2, Yu.A. Merkul'ev3, W. Nazarov6, P. Pisarczyk7, T. Pisarczyk4, M. Pfeifer2, O. Renner2 and V.B. Rozanov3
1 Czech Technical University, FNSPE, Brehova 7, 115 19 Prague 1, Czech Republic
2 Institute of Physics, AS CR, Na Slovance 2, 182 21 Prague 8, Czech Republic
3 P.N. Lebedev Physical Institute of RAS, Leninskyi Ave. 53, 117 924 Moscow, Russia
4 Institute of Plasma Physics and Laser Microfusion, 23 Hery St., 00-908 Warsaw, Poland
5 Troitsk Institute of Innovation and Thermonuclear Research, 142 190 Troitsk, Russia
6 University of St. Andrews, School of Chemistry, St. Andrews, Fife KY16 9ST, UK
7 Warsaw University of Technology, ICS, 15 Nowowiejska St., Warsaw, Poland
Interaction of sub-nanosecond intense laser pulses with foams containing fine and large pores has been studied experimentally. Laser penetration and energy transport in the foam material are measured via streaked side-on x-ray slit images. Shock wave transition through the foam is detected via streaked optical self-emission from foil attached on the foam rear side. The shock transition time increases with the pore size, foam density, and also with the contents of high Z additions in plastic foams. Foil acceleration is observed via 3-frame interferometry. Comparison of experimental results with numerical simulations and an analytical model is underway.
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