https://doi.org/10.1007/s100530070012
Analysis of the impedance mismatch effect in foam-solid targets compressed by laser-driven shock waves
1
Laboratoire LULI b, CNRS-CEA-École Polytechnique-Université Pierre et Marie Curie, 91128 Palaiseau, France
2
Dipartimento di Energetica, Università degli Studi di Roma "La Sapienza", via A. Scarpa 14, 00161 Roma, Italy
and
Associazione EURATOM-ENEA sulla Fusione, Centro Ricerche Frascati, 00044 Frascati, Italy
3
Dipartimento di Fisica "G. Occhialini"and INFM, Università degli Studi di Milano Bicocca, via Emanueli 15, 20146 Milano, Italy
Received:
20
January
2000
Revised:
16
May
2000
Published online: 15 December 2000
The impedance mismatch effect in a two-layer (low density plastic foam, and solid aluminum, respectively) plane target compressed by a laser driven shock wave is considered. In such targets the ablative pressure generated by absorption of laser light in the foam layer is amplified when crossing the foam-aluminum interface. In this paper an analytical model is developed to evaluate the shock pressure in the aluminum layer as a function of the density and thickness of the foam layer and of the laser parameters. The model is in good agreement with previously published experimental results [A. Benuzzi et al., Phys. Plasmas 5, 2827 (1998)].
PACS: 52.50.Jm – Plasma production and heating by laser beams / 52.50.Lp – Plasma production and heating by shock waves and compression / 44.30.+v – Heat flow in porous media
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000
