Phosphor thermometry: A comparison of the luminescence lifetime and the intensity ratio approach

In the context of phosphor thermometry, the most common measurement strategies, namely the lifetime and the intensity ratio approach, have been compared. Using the phosphor Mg4FGeO6:Mn and the identical experimental setup, both techniques have been characterized in terms of precision and accuracy. Therefore, two-dimensional calibration measurements have been performed to evaluate temperature-lifetime and temperature-ratio characteristics as well as shot-to-shot and pixel-to-pixel standard deviations. In a second experiment, different parameters were varied at constant temperatures to quantify the accuracy of both measurement strategies. Finally, both methods were compared monitoring a spatial temperature gradient. (C) 2012 Published by Elsevier Inc. on behalf of The Combustion Institute.