Abstract
A shock tube with an internal diameter of 500 mm and a planar 30° nozzle at one end was used in a study of the influence of O2, H2, CO, H2O, C2H2, and C2H4 admixtures on the gain of a 15% CO2+83% N2+2% H2O gasdynamic laser. The pressure of the active mixture in the entry plane of the nozzle was 5.3 atm and its temperature was 1790°K. it was found that the addition of diatomic molecules in amounts up to 10–14% had little influence on the measured gain. Polyatomic molecules had a stronger influence (they reduced the gain) but throughout the investigated range of the admixtures (up to 16%) the gain was still positive.
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