FIELD: laser processing of materials for mechanical engineering. SUBSTANCE: device has three axial compressors. Gas discharge chamber has two partitioned cathode plates which are located at funnel angle of 6 degrees with respect to gas flow. Three axial chambers provide possibility to increase volume of gas flow by factor of three. Gas discharge chamber is extended along gas flow direction with funnel angle of 6 degrees. This results in decreased effect of discharge voltage drop which is caused by gas heating and decreased gas density. EFFECT: increased output power of laser beam. 2 cl, 5 dwg
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