Investigation of the compression dynamics of gas-filled glass microspheres with aspect ratio R/ΔR=30-300 in experiments with the Sokol installation

The results are generalized on investigations of the gasodynamic parameters of the compression dynamics for glass gas-filled microspheres with R/ΔR=30-300 measured with the ''Sokol'' installation. The flux densities of the incident and absorbed laser energy are q ∼ (0.1-4.0)x1014 W/cm2 and qn ∼ (0.1-1.0)x1014 W/cm2 and the specific energy contributions ε0 ∼ 0.03-0.3 j/ng. The dependences of the mean velocity of flight of the shell toward the center, the mean expansion velocity of the laser plasma, the flow rate of mass, mean ablation pressure, hydrodynamic efficiency and mass coefficient on the aforementioned physical parameters are investigated. The matching and optimization of the parameters of the laser-target system toward increasing the specific energy contribution are carried out on the basis of the results obtained. The value of the electron heat conduction restriction coefficient is determined in greater detail by comparing the experimental results with those of gasodynamic calculations. The results of the investigation are compared with those for theoretical models, results of gasodynamic calculations and with the data obtained with the ''Kalmar'', ''Delfin'', ''Vulkan'', ''Chroma-1'', ''Omega'' and ''Argus'' installations