Chemiluminescence from the supersonic jet of a cw HF chemical laser

摘要

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 flows are reported: Hesngbnd;SF6sngbnd;H2hyphen;(1) with O2, (2) without O2, and (3) with reduced SF6without O2. Spatially averaged number densities of the HF vibrational levels (ngr; equals; 1, 2, 3, 4) have been determined during zerohyphen;power conditions. Vibrational nonequilibrium is evident. The largest HF densities are sim;1015No.sol;cm3. Observed rotational temperatures, equilibrated to jet static temperature, range from 560 down to 390deg;K. The largest zerohyphen;power gain coefficient deduced is 0.12 cmminus;1on thePbranch of the 2 rarr; 1 band.