ABSTRACT
The DYS halogen lamp was chosen to be the focus of the studies because: i) it provided ready optical access to its axial, intra-coil regions; ii) it allowed simple, accurate control of gas temperatures over a very wide range (300 k to more than 3,000 K); and iii) the composition of its 5% HBr and 95% N2 cold-fill chemical dose responds in a significant and reversible manner to the changing environment which results from changes in the filament temperature.
