Two-photon excitation of nitric oxide fluorescence as a temperature indicator in unsteady gasdynamic processes
作者： R. L. McKenzie , K. P. Gross
DOI: 10.1364/AO.20.002153
关键词:
摘要: A laser-induced fluorescence technique, especially suitable for measuring fluctuating temperatures in cold turbulent flows containing very low concentrations of nitric oxide, is described and analyzed. Temperatures below 300 K may be resolved with SNRs >50:1, using commercially available high-peak-power tunable dye lasers. The method relies on the two-photon excitation selected ro-vibronic transitions NO(A(2)Sigma(+), upsilon' = 0 ? X(2)II, upsilon'' 0) gamma band. analysis includes effects quenching shows technique to effective at all densities ambient. SNR estimates are based a preliminary measurement absorptivity rotational transition NO gamma(0,0)
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