Results of turbulent mixing research of thin Al and Au layers under laser acceleration of the three-laser targets Si/Al/Au are presented. Analyses of experimental data under the program SND-TUR, where the Nikiforov model is used for turbulent mixing description, testify to the essential impact of hot spots on the examined processes in distribution of laser radiation intensity on the surface of the target. Experimental setup on the laser beams' smoothing by the “foam” coated on the target, has been considered. The results of the first experiments are presented.