Quantitative diagnostics of flame radicals by picosecond LIF spectroscopy

A. Offt; A. Knaack; J. Waleswki; Wolfgang Schade

doi:10.1117/12.221002

20 September 1995 Quantitative diagnostics of flame radicals by picosecond LIF spectroscopy

A. Offt, A. Knaack, J. Waleswki, Wolfgang Schade

Proceedings Volume 2506, Air Pollution and Visibility Measurements; (1995) https://doi.org/10.1117/12.221002
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany

Abstract

A frequency stabilized distributed feedback dye laser is applied to give Fourier-limited excitation pulses with a duration of 50 ps at 226 nm and 309 nm. Then NO and OH radicals are excited in an atmospheric standard flame (McKenna burner) or in a pressure cell. The time-evolution of the flurorescence is recorded by a Streak camera in a pressure in the picosecond time scale. Quenching rates for NO, with CO₂, O₂, NO, and N₂ are reported. Systematic influences of the direction of polarization of the exciting laser beam on the LIF-decay are discussed as well as sensitivity and detection limits of the picosecond spectroscopy compared to the nanosecond LIF.

Citation Download Citation

A. Offt, A. Knaack, J. Waleswki, and Wolfgang Schade "Quantitative diagnostics of flame radicals by picosecond LIF spectroscopy", Proc. SPIE 2506, Air Pollution and Visibility Measurements, (20 September 1995); https://doi.org/10.1117/12.221002

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