About the authors
| First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address. | Safiullin R.K. – doctor of physical-mathematical sciences, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kazan State University of Architecture and Engineering The organization address: 420043, Russia, Kazan, Zelenaya st., 1 |
| Title of the article | Research of fast flow gas discharge CO2 lasers with conical discharge tubes |
| Abstract. | The processes in fast flow gas discharge CO2 lasers with conical discharge tubes were numerically investigated. Glow discharge, molecular vibration kinetics as well as non-equilibrium gas dynamic equations were considered. A harmonic oscillator model for molecular vibration kinetics was used. Gas discharge equations for electronegative CO2-N2-He-H2O laser mixtures were employed. Complicated system of differential equations was solved by splitting on three subsystems: the first one for gas dynamics, the second one for molecular vibration kinetics and the third – for glow discharge equations. At first, gas dynamic quantities for layer x+?x were calculated by the method previously used for CO-lasers. After that vibration kinetic quantities were obtained using implicit difference scheme with the Newton iterative method. These procedures were repeated step by step from the cathode up to the anode. And then glow discharge equations were solved for the whole discharge region by the matrix sweep method. To obtain self-consistent solution one needs to make up to 10 global iterations between these three subsystems. As a result, space distributions for charged components of gas discharge plasma, as well as for gas temperature, gas velocity, gain coefficient and laser output were calculated. Good agreement with the available experimental results was achieved. |
| Keywords. | conical tube, glow discharge, CO2-laser, harmonic oscillator. |
| For citations: | Safiullin R.K. Research of fast flow gas discharge CO2 lasers with conical discharge tubes // Izvestiya KGASU. 2016. №3(37) P.268--1. |
