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J. Phys. IV France 133 (2006) 305-308
The influence of underdense polymer target with/without high-Z nanoparticles on laser radiation absorption and energy transportN.G. Borisenko1, I.V. Akimova1, A.I. Gromov1, A.M. Khalenkov1, V.N. Kondrashov2, J. Limpouch3, Yu.A. Merkuliev1 and V.G. Pimenov4
1 P.N. Lebedev Physical Institute of RAS, Leninskyi Pr-t. 53, 117924 Moscow, Russia
2 Troitsk Institute of Innovation and Thermonuclear Research, 142190 Troitsk, Russia
3 Institute of Physics, AS CR, Na Slovance 2, 18221 Prague 8, Czech Republic
4 Zelinsky Institute of Organic Chemistry, Leninskiy Pr-t. 49, 119991 Moscow, Russia
Fabrication methods for low-density fine-structure (cell size <1 m) 3-D networks of cellulose triacetate (TAC) are developed. Target densities ranged 4-20 mg/cc, similar polymer structures were produced both with no load and with high-Z cluster dopant with concentration up to 30%. Foams of varying density down to 0.25 plasma critical density at the third harmonic of iodine laser wavelength are supplied for laser shots. Experiments with underdense foam targets with and without clusters irradiated on the PALS laser facility are analyzed preliminary, showing strong influence of target structure on process of laser light absorption. Heat and radiation transport in such targets are considered.
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