Abstract

A wide range of problems associated with gas-dynamic lasers is examined. Equations describing the kinetics of vibrational relaxation in mixtures of multiatomic molecular gases are derived. These equations are used to explain the conditions for inversions in gas-dynamic lasers with supersonic nozzles and with adiabatic expansion of the gas from a slit. The optimum initial pressures and temperatures, nozzle shapes and sizes, and mixture compositions for these lasers are found. Gas-dynamic lasers with supplementary disequilibrium sources, including nonresonance vibrational exchange, chemical recombination reactions, and electronic excitation, are discussed in detail.

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