Abstract
This work demonstrates precise aerosol phosphor thermometry (APT) measurements over a large temperature range by applying scattering-referenced APT (SRAPT) with the phosphor divalent Europium doped in Barium Magnesium Aluminate (Eu:BAM). Measurements were taken using Eu:BAM seeded into an air jet mixing with the products of a concentric methane-air flat flame. In-situ calibration of the SRAPT ratio versus temperature was performed from 500 to 1400 K. Peak temperature sensitivities of 1–1.5 %/K were observed, approximately 4 times higher than the spectral luminescence intensity ratio method typically used for Eu:BAM. Despite its moderate quenching temperature (700 K), the high initial signal intensities before the onset of thermal quenching for Eu:BAM allowed reliable single-shot measurements to be made continuously from 500 K to greater than 1200 K. These results highlight the importance of high signal levels for extending the measurement range of SRAPT.
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