Results of experiments for the study of the directional pattern of laser plasma-scattered radiation on the "Iskra-5" unit
L.M. Lavrov1, E.V. Pozdnyakov1, V.M. Yamshchikov1, M.A. Yamshchikova1
1Russian Federal Nuclear Center - All-Russian Research Institute of Experimental Physics, Sarov, Nizhny Novgorod Region, Russia
Email: feynman94@yandex.ru
The Iskra-5 unit was used to study dependence of directivity of laser plasma-scattered radiation on the power density of laser radiation with the wavelength of 1.315 μm on a target and on sizes of a focal spot and its form. It is shown that with the power density from 2·1013 to 2·1014 W/cm2 the integral (in 4π) scattering loss is ~50 % of the pumping energy with various forms of the focal spot and its sizes within the range from 0.2 to 14 mm. At the same time, the nature of the directional pattern substantially depends on radiation intensity, the form and sizes of the focal spot and directions of a polarization vector. Keywords: directional pattern, nonlinear scattering, photopaper, laser plasma.
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