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On Phase Transitions in Field of Laser Radiation of Moderate Intensity in Vacuum Conditions

Authors: Protasov Yu.Yu., Shchepanyuk T.S. Published: 28.02.2014
Published in issue: #4(31)/2008  
DOI:

 
Category: Physics  
Keywords:

Results of investigations of thermo-physical and gas-dynamical processes of interaction (in quasi-one-dimensional statement) of laser radiation with a power density of 106...108 W/cm2 (λ≈1,06 μm, λ≈0,69 μm, τ=10-4...10-8 c) with spatially confined targets (fusible metals and dielectrics of polymer series) are presented. The results are necessary for analysis of a macrostructure of the interaction area and dynamics of phase transitions. With intensities of laser radiation that are smaller than thresholds of optical breakdown, conditions of transition of a wave of mature evaporation into a wave of thermal ionization are determined for homogenous gas flows and flows with the condensed phase.