Real optical imaging simulation of laser-produced aluminum plasmas

We developed a post-processing optical imaging model based on two-dimensional axisymmetric radiation hydrodynamics. Simulation and program benchmarks were performed using laser-produced Al plasma optical images obtained via transient imaging. The emission profiles of a laser-produced Al plasma plume in air at atmospheric pressure were reproduced, and the influence of plasma state parameters on radiation characteristics were clarified. In this model, the radiation transport equation is solved on the real optical path, which is mainly used to study the radiation of luminescent particles during plasma expansion. The model outputs consist of the electron temperature, particle density, charge distribution, absorption coefficient, and corresponding spatio-temporal evolution of the optical radiation profile. The model helps with understanding element detection and quantitative analysis of laser-induced breakdown spectroscopy. (c) 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

Automated summary

We developed a post-processing optical imaging model based on two-dimensional axisymmetric radiation hydrodynamics, benchmarked with laser-produced Al plasma optical images obtained via transient imaging. The model reproduces the emission profiles of a laser-produced Al plasma plume in air at atmospheric pressure, and clarifies the influence of plasma state parameters on radiation characteristics. It solves the radiation transport equation on the real optical path, mainly used to study the radiation of luminescent particles during plasma expansion. The model provides outputs such as electron temperature, particle density, charge distribution, absorption coefficient, and spatio-temporal evolution of the optical radiation profile, aiding in element detection and quantitative analysis of laser-induced breakdown spectroscopy.