The development of a new laser-based temperature measurement technique is explained. The technique is based on molecular tagging velocimetry (MTV), an established, non-intrusive method of obtaining velocity profiles throughout a fluid. MTV works by dissolving a photoluminescent chemical in water and directing an ultraviolet laser beam into the solution. The intensity of the light emitted by the chemical upon excitation by the UV beam is inversely related to the temperature of the fluid. Recent research has been directed towards quantifying this temperature-intensity relationship. The method of obtaining temperature measurements, including equipment setup and image analysis, is explained, and a summary of results is given.

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