Experimental determination of the indicatrix of scattered laser radiation from plasma at an advanced multi-channel high-power laser setup
Lavrov L. M. 1, Pozdnyakov E. V. 1, Yamschikov V. M. 1, Mokeev A. S. 1, Yamschikova M. A. 1
1Federal State Unitary Enterprise "Russian Federal Nuclear Center - All-Russian Research Institute of Experimental Physics", Sarov, Nizhny Novgorod Region, Russia
Email: feynman94@yandex.ru
The indicatrix of radiation scattered by laser plasma was determined at an advanced multi-channel high-power laser setup. Planar targets were irradiated with a laser pulse with a wavelength of 532 nm, an energy of 2.1-3.65 kJ, and a duration of 3-5 ns. The indicatrix was determined at angles of 2-90o to the normal vector to the target surface. It was demonstrated that side scattering (in the region of angles greater than 45o) is lacking at an intensity ≤ 2.6·1014 W/cm2; instead, backscattering in the form of a double cone was recorded. Pronounced side scattering directed perpendicular to the polarization plane emerged at an intensity ≥3.4·1014 W/cm2. Keywords: scattered radiation indicatrix, laser plasma, photo paper. DOI: 10.21883/0000000000
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