Measurement and Analysis of the HF Radiation from a Reacting Supersonic Jet.
Rept. for Jan 71-Jan 72,
AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS
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The spontaneous emission from HF infrared bands in the free jet of a continuous HF chemical laser with a slit nozzle bank has been measured at a number of downstream positions. Three cases are reported high-power flow 1 that includes O2, 2 without O2, and 3 with reduced SF6. Spatially averaged number densities of the HF vibrational levels v 1, 2, 3, 4 have been determined for the zero-power case. Vibrational nonequilibrium is evident. Observed rotational temperatures range from 560 down to 400 degrees K. Gain coefficients are deduced. Data have been fitted to both a one-dimensional, constant-pressure streamtube jet model and a two-dimensional model the best fit occurs with the latter. Deactivation plays an important role in determining the average gain. The principal deactivator of HFv is H. Other important deactivation mechanisms are vibration-vibration transfers with HF or H2. Modified author abstract
- Lasers and Masers
- Atomic and Molecular Physics and Spectroscopy