UDC 621.378.324
ABOUT VOLUME DISCHARGE LOCALIZATION MECHANISM IN SMALL-SIZED SEALED-OFF TEA-CO2 LASERS
B. A Kozlov, Dr. Sc. (Phys. and Math.), professor, department of electronic devices, RSREU, Ryazan, Russia;
orcid.org/ 0000-0003-4747-6340, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Mai The Nguyen, post-graduate student, RSREU, Ryazan, Russia;
orcid.org/0000-0002-4360-853X, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
The structure of electrode surface and their auto-electronic characteristics were studied before exposure to volume discharge plasma and after a certain time of interaction with volume discharge plasma in atmospheric pressure CO2 laser mixtures. It was found that under the influence volume discharge plasma, the microstructure of electrodes working surfaces and their field emission properties change. The mechanism of the pumping volume discharge localization as a result of local increase in field currents from cathodes surface is substantiated. The aim of this work is to establish the causes and possible localization mechanism of self-sustained volume discharge at atmospheric-pressure CO2 laser mixtures under conditions of prolonged interaction of volume discharge plasma with working surfaces of electrodes.
Key words: volume discharge, field emission of electrons, TEA-CO2 laser, resource, cathode surface microstructure, plasma-chemical reactions, chemical composition of working mixtures.