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Single-pulse, two-line temperature-measurement technique using KrF laser-induced O2 fluorescence

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Abstract

A new single-pulse, two-line laser-induced O2 fluorescence (LIF) temperature-measurement technique was demonstrated. The fluorescence spectrum obtained with multichannel detection following simultaneous excitation of two coincident transitions in the 0–6 and the 2–7 bands of the B3uX3g Schumann–Runge system was used to determine the gas temperature. The rms error of 100-pulse average LIF temperature measurements, referenced to their corresponding thermocouple measurements, was 1.3% over a temperature range of 1300–1800 K in atmospheric air. Photon shot noise was found to be the primary source of uncertainty for these measurements in a quiescent environment. Single-pulse temperature-measurement uncertainties (1 σ) ranged from approximately 13% at 1300 K to 7% at 1800 K.

© 1995 Optical Society of America

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