High pressure E-beam controlled CO
2 laser has been constructed and its performance characteristics has been investigated. Uniform glow discharge of arbitraly gas mixture of CO
2, N
2 and He is easily obtained up to 15 atomospheric pressure. Small signal gain is 4%/cm at electrical energy input of 150J/latm. The pressure dependence of small signal gain shows the gain overlapping of vibrational-rotational levels.
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