Experimental Results for Layered Targets Irradiated by Double Focal Spot
A. Aliverdieva, b, c, D. Batanic, d, R. Benoccie, R. Dezuliane, A. Amirovaf, E. Krouskyg, h, M. Pfeiferg, h, J. Skalag, h, R. Dudzakg, h, K. Jakubowskai
aIGRRE JIHT RAS, Pr. Shamilya 39A, 367030, Makhachkala, Russia
bDagestan State University, Gadjieva Str. 43A, 367025, Makhachkala, Russia
cNational Research Nuclear University MEPhI, Department of Plasma Physics, Moscow, Russia
dUniversity of Bordeaux, CEA, CNRS, CELIA (Centre Laser Intense at Applications), UMR 5107, F-33405 Talence, France
eUniversitá di Milano Bicocca, Piazza della Scienza, 20126 Milan, Italy
fIP DFRC RAS, Yaragskogo Str. 94, 367003, Makhachkala, Russia
gInstitute of Physics ASCR, Na Slovance 1999/2, 182 21, Prague 8, Czech Republic
hInstitute of Plasma Physics ASCR, Za Slovankou 1782/3, 182 00, Prague 8, Czech Republic
iIPPLM, Warsaw, Poland, Hery 23, 01-497 Warsaw, Poland
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We performed an experiment dedicated to study the interaction of a double-spot laser beam with aluminum foils and with foam-aluminum layered targets. The experiment was performed using the Prague PALS iodine laser working at 0.44 μm wavelength and irradiance of a few 1015 W/cm2. Shock breakouts for pure Al and for foam-Al targets have been recorded using time-resolved self-emission diagnostics and compared to results from numerical simulations. In the case of foam layered targets, we observed a spatial redistribution of the pressure and collision between two shocks originating from two spots. We also observed a significant delay of shock breakout in the shots with foam.

topics: laser-driven shocks, foams, impedance mismatch, shock collision