UDC 21.378.324
INITIAL FORMATION OF VOLUME PUMPING IN SMALL-SIZED TEA-CO2 LASER
Do Quang Manh, post-graduate student RSREU, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.
B. A. Kozlov, PhD, Dr. in physico-mathematical sciences, full professor of Electronic Devices Department, RSREU; This email address is being protected from spambots. You need JavaScript enabled to view it.
The influence of initial chemical composition of CO2-laser mixtures at atmospheric pressure on the processes occurring at the initial stage of pump volume discharge formation is studied theoretically and experimentally. The energy costs for achieving the required level of initial ionization are experimentally determined and the values of breakdown voltages in a wide range of changes in component composition of active medium of small-sized sealed-off TEA-CO2 laser are measured.
The main aim of this work is to determine the degree of influence of chemical composition of working mixture on the amount of energy expenditure for initial ionization providing homogeneous breakdown and on the values of breakdown voltage of gas-discharge gap in small-size TEA-CO2 lasers with working gaps V1 = 0.8*0.8*18 and V2 = 1.8*1.2*24 cm3.
Key words: TEA-CO2 laser, preliminary ionization, VUV radiation, photo-ionization, critical photoelectron concentration, breakdown voltage, γ – processes.