2. Quantitative temperature measurement in the gas phase

Several approaches to thermometry based on the IDF principle exist, using the temperature dependence of the absorption and emission spectrum. The measurements presented in this section result from the application of the macroscopic formulation of laser-induced fluorescence defined by equation (14) .

In fact, this formulation enables us to obtain a fluorescence signal as a function of the thermodynamic parameters and experimental quantities we wish to measure.

Both the fluorescence signal and the fluorescence spectrum of tracers show a strong dependence on temperature, and the effective absorption cross-section...