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Laser SRS Diagnostics of HBr in Tungsten Halogen Lamps

Volume 45, Number 3 (April 1991) Page 398-403

Bigio, Laurence


The generation of infrared radiation by stimulated electronic Raman scattering (SRS) in a cesium vapor heat pipe is used to obtain diagnostic information on HBr in a tungsten halogen lamp. The IR beam traverses through the center of the coiled filament of a General Electric projection lamp, and spectra are taken of the R branch in the fundamental band for the lamp lit from 0 to 148 W, corresponding to filament temperatures of 296-2387 K. Molecular rotational temperatures and absolute HBr densities are then derived from the spectra. The results demonstrate the method to be a useful diagnostic tool for spatially resolved measurements of a key partner in the tungsten halogen cycle.