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. | Galeev R.S. – doctor of physical-mathematical sciences Kazan Federal University The organization address: 420008, Russia, Kazan, Kremlyovskaya st., 18 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 | Studies of fast CO2 lasers with cylindrical and conical discharge tube |
| Abstract. | The processes in fast flow gas discharge CO2 lasers were numerically investigated. Glow discharge, molecular vibration kinetics as well as non-equilibrium gas dynamic equations were considered. 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 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 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. | cylindrical tube, glow discharge, CO2 laser, harmonic oscillator. |
| For citations: | Galeev R.S., Safiullin R.K. Studies of fast CO2 lasers with cylindrical and conical discharge tube // Izvestiya KGASU. 2014. №4(30) P.390-397. |
