Generation of gas-plasma flows by laser ablation of photopolymerizable compositions

Abstract

The results of studying the effectiveness of using photopolymerizable compositions (PPC) in var ious purpose laser plasma facilities with regard to the transportation and fine dosing of the working medium, as well as providing a long service life and reliability, are presented. The characteristics of the pulsed and con tinuous laser radiation curing of PPC and mixtures thereof are discussed in terms of the spectral energetic characteristics of the incident radiation. The thresholds of nanosecond laser ablation in the UV and near IR regions, specific ejected mass, momentum coupling coefficient, and efficiency of conversion of laser radia tion energy into the kinetic energy of the laser induced gas plasma ablation jet for PPC in the liquid and solid states. The highest efficiency of generation of the gas plasma ablation jet was achieved for the laser irradiation of initially liquid PPC at a wavelength of 355 nm, a wavelength optimal for the photopolymerization of PPC.

Special Working Media for Laser Plasma Generators

“…The amount of stock materials making a liquid light-curable or magneto-rheological is of 10% vol. order [29].…”