Electron energy distribution in CO2laser discharges

Electrical plasma parameters of the CO2laser were investigated by probe and high-frequency techniques. The electron energy distribution function was measured by the second derivative method. The relatively high-pressure effect on the electron probe current was taken into account when analyzing the experimental curves. The influence of the addition of N2, He, Xe and the influence of CO2dissociation on the plasma discharge properties were studied. Calculations of the pumping rates to vibrational levels taking part in creating inversion show that the influence on output power of a CO2laser usually observed with the addition of N2and He cannot be explained by a changing of the electron component of the plasma. The increase of output power and efficiency with addition of Xe to the CO2laser is connected with an essential changing of plasma parameters of the electron component.