Title :
Autoemissive characteristics of electrodes in sealed-off TEA-CO2 lasers
Author :
Kozlov, A.V. ; Kozlov, B.A. ; Solovyov, V.I.
Author_Institution :
Dept. of Electron. Eng. & Technol., Radio-Eng. Acad., Ryazan, Russia
Abstract :
Plasma influence of a volume discharge in CO2 laser mixtures of high pressure on a microstructure of electrode active surfaces and their autoemissive properties are investigated. A correlation between changing in a microstructure of the electrode surfaces and increase in autoelectronic currents, the formation of local channels in a cathode area of the volume discharge and limitation of the lifetime of small-sized sealed-off TEA-CO2 lasers is stated. Materials more stable to a change in a structure of the surface under the influence of plasma of the volume discharge are noted. A new model of the emission center formation initiating an appearance of local channels is suggested
Keywords :
carbon compounds; cathodes; discharges (electric); electrodes; electron emission; gas lasers; plasma; seals (stoppers); CO2; autoelectronic currents; autoemissive characteristics; cathode area; electrode active surfaces microstructure; emission center formation; lifetime limitation; local channels formation; plasma influence; sealed-off TEA-CO2 laser electrodes; volume discharge; Cathodes; Electrodes; Laser modes; Microstructure; Optical materials; Plasma materials processing; Plasma properties; Plasma stability; Surface discharges; Surface emitting lasers;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum, 1998. Proceedings ISDEIV. XVIIIth International Symposium on
Conference_Location :
Eindhoven
Print_ISBN :
0-7803-3953-3
DOI :
10.1109/DEIV.1998.740574
