Accession Number : AD0721735

Title :   Gain Kinetics of High Pressure Gasdynamic Lasers,

Corporate Author : WASHINGTON UNIV SEATTLE AEROSPACE RESEARCH LAB*

Personal Author(s) : Christiansen,Walter H. ; Tsongas,George A.

Report Date : FEB 1971

Pagination or Media Count : 34

Abstract : A combined analytical and experimental investigation of rapidly expanded CO2 laser mixtures is described. Study of the vibrational kinetics indicates that population inversions with high vibrational energy density can be produced at high pressures by utilizing low (starved) concentrations of CO2. Scaling laws for predicting the gain of starved systems are developed. A description is given of gain measurements carried out using a CO2 laser to probe the flow in a nozzle at the point where the Mach number is approximately four. Population inversions at static pressures as high as about one atmosphere have been observed and found to be in reasonable agreement with predictions. (Author)

Descriptors :   (*GAS LASERS, NOZZLE GAS FLOW), CARBON DIOXIDE, KINETIC ENERGY, GAIN, MOLECULAR ENERGY LEVELS, TEST METHODS

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE