Energy transfer in low-density porous targets doped by heavy elements

• Published in: Journal of physics. Conference series Vol. 112; no. 2; p. 022010
• Main Authors: Rozanov, V, Barishpoltsev, D, Vergunova, G, Gus'kov, S, Demchenko, N, Doskoch, I Y, Ivanov, E, Aristova, E, Zmitrenko, N, Limpouch, J, Klir, D, Krousky, E, Masek, K, Kmetik, V, Ullschmied, J
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.05.2008
• Subjects: Aerogels; Density; Emission analysis; Energy transfer; Grain structure; Heavy elements; Iodine lasers; Lasers; Mathematical analysis; Mathematical models; Physics; Plasma; Plastic foam; Pore size; Pulse duration
• ISSN: 1742-6596; 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/112/2/022010

A low-density plastic aerogel foams, including doped with copper clusters have been irradiated by the first (L 1.315 Fm) and third (L 0.438 Fm) harmonics of the PALS iodine laser. Laser pulse duration was approximately 380 ps (FWHM), laser energy was up to 300 J, and laser intensity on the target was typically by an order of 1014−1015 W/cm2. The targets were of a fine-grain structure with the pore size in the range of 1-2 Fm. The energy transfer in plasma was measured by the X-ray and optical diagnostics. The observed phenomena are explained via mathematical modelling of the processes in plasma performed by fluid codes RAPID and LATRANT, developed at P.N. Lebedev Physical Institute and the Institute of Mathematical Modelling of RAS, Moscow. Our simulations take into account a microscopic structure of porous matter and energy transfer and loss by the X-ray emission. The plasma radiative characteristics were calculated by DESNA code. The analysis of the experimental and calculated data allows one to find the energy balance in the target and the plasma characteristics important for the dynamics of the processes.