Abstract
The properties of microheterogeneous plasma produced by irradiation of a polymer aerogel target with an intense (1014 W/cm3) short (0.5 ps) 1.064-μm laser pulse were studied. It is found that, even at plasma densities exceeding the critical density, a small fraction of the incident laser radiation penetrates through the plasma in which the processes of density and temperature equalization still take place. The intensification (as compared to plasmas produced from denser foams and solid films) of transport processes in such plasma along and across the laser beam can be caused by the initial microheterogeneity of the solid target. The replacement of a small (10% by mass) part of the polymer with copper nanoparticles leads to a nearly twofold increase in the intensity of the plasma X-ray emission.
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Original Russian Text © N.G. Borisenko, Yu.A. Merkul’ev, A.S. Orekhov, S. Chaurasia, S. Tripathi, D.S. Munda, L.J. Dhareshwar, V.G. Pimenov, E.E. Sheveleva, 2013, published in Fizika Plazmy, 2013, Vol. 39, No. 8, pp. 752–758.
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Borisenko, N.G., Merkul’ev, Y.A., Orekhov, A.S. et al. Specific features of microheterogeneous plasma produced by irradiation of a polymer aerogel target with an intense 500-ps-long laser pulse. Plasma Phys. Rep. 39, 668–673 (2013). https://doi.org/10.1134/S1063780X13080035
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DOI: https://doi.org/10.1134/S1063780X13080035