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The mechanism of localization of volume discharge and limitation of resource in small-sized sealed-off TEA-CO 2  lasers are grounded. The main processes which initiate the transition of volume discharge into the local one are connected with autoemissive currents from microinhomogeneities at the cathode surfaces. Maximal resource achieved in TEA-CO 2  lasers with electrodes made from materials which more stable to the influence of the volume discharge plasma. There are Mo, Ti, Ta, Nb, W and C (graphite). Lifetime of the small-sized sealed-off TEA-CO 2  laser up to 2000 hours using graphite cathodes has been achieved.

Phenomena at the electrode surfaces and localization of the volume discharges in small-sized sealed-off TEA-CO2 lasers

Phenomena at the electrode surfaces and localization of the volume discharges in small-sized sealed-off TEA-CO₂ lasers