Simulation and initial experiments of a high power pulsed TEA CO2 laser. (2nd December 2015)

• Record Type: Journal Article
• Authors: Torabi, R; Saghafifar, H; Koushki, A M; Ganjovi, A A
• Is Part Of: Physica scripta. Volume 91:Number 1(2016:Jan.)
• Publication Date: 2015-12-02
• Subjects: TEA CO2 laser -- pin array pre-ionization -- nonlinear RLC electric circuit; Physics -- Periodicals; 530.05
• DOI: 10.1088/0031-8949/91/1/015501
• Languages: English
• ISSNs: 0031-8949

Abstract

Abstract: In this paper, the output characteristics of a UV pin array pre-ionized TEA CO2 laser have been simulated and compared with the associated experimental data. In our simulation, a new theoretical model has been improved for transient behavior analysis of the discharge current pulse. The laser discharge tube was modeled by a nonlinear RLC electric circuit as a real model for electron density calculation. This model was coupled with a six-temperature model (6TM) in order to simulation dynamic emission processes of the TEA CO2 laser. The equations were solved numerically by the fourth order Runge–Kutta numerical method and some important variables such as current and voltage of the main discharge, resistance of the plasma column and electron density in the main discharge region, were calculated as functions of time. The effects of non-dissociation factor, rotational quantum number and output coupler reflectivity were also studied theoretically. The experimental and simulation results are in good agreement.