UDC 621.373.826
PHOTOELECTRON DYNAMICS AT PRE-IONIZATION STAGE IN SEALED-OFF TEA-CO2 LASERS
B. A. Kozlov, Dr. in physics and mathematics, full professor, department of industrial electronics RSREU, Ryazan, Russia;
orcid.org/0000-0001-5957-3688, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
E A. Kozlov, Ph.D. (in technical sciences), associate professor, department of industrial electronics, RSREU, Ryazan;
orcid.org/0000-0003-2038-6732, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
D. S. Makhanko, Ph.D. (in technical sciences), senior researcher, JSC Plasma, Ryazan, Russia;
orcid.org/0000-0002-7609-9970, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Quantitative information was obtained on photoelectron dynamics during pre-ionization stage in a sealed TEA-CO2 laser, the working mixtures of which contain products of plasma-chemical reactions. The authors established that the decrease in photoelectron concentration during pre-ionization stage by several orders of magnitude is due to the attenuation of ionizing radiation intensity by secondary compounds formed in laser's active medium under the influence of plasma-chemical reactions. A mechanism for localizing a nanosecond volume discharge which limits pulse repetition rate and average power of laser radiation was substantiated.
Key words: TEA-CO2 laser, volume discharge, pumping, preliminary ionization, plasma-chemical reac tions, concentration and lifetime of photoelectrons.