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A two-wavelength high-speed holographic cinematography, integral and time-resolved spectroscopy and splite unfolding methods were used in an investigation of a laser plasma initiated at the surfaces of metal samples by laser pulses in the external electric field. The temporal evolution of the electron densities and heavy particle concentrations was determined and a study was made of the nature of motion of shock wave and plasma fronts. A weak dependence of the evolution of the shock wave velocity on the target materials (aluminum, copper, zinc, led, indium) was observed in the average power density range (106 - 107 W/cm²). A faster increase in the dimensions of a refracting plasma region, compared to a luminous region, and strong expulsion of cold air by an erosion plasma were recorded. [ABSTRACT FROM AUTHOR]

Acoustic emission of a zone of the destruction formed during influence of pulse laser radiation on a surface of metal is considered. Dependence of the time form of acoustic fluctuations on parameters of an irradiated material and the law of increase in depth of a crater was estimated. It is revealed, that at action on a surface of the copper sample of a laser impulse duration ∼ 20 μs time of growth of a zone of destruction makes approximately 40 μs, that will well be coordinated with time of existence of plasma formation at a surface of the target exposed to laser-plasma processing (∼ 50 μs). [ABSTRACT FROM AUTHOR]