An acoustic model for microresonator in on-beam quartz-enhanced photoacoustic spectroscopy

Applied Physics B - 2012
H. Yi1,2, W. Chen3, X. Guo4, S. Sun2,1, K. Liu1,2, T. Tan1,2, W. Zhang1,2, X. Gao1,2
1Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Science, Hefei, China
2Laboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics & Fine Mechanics, Chinese Academy of Sciences, Hefei, China
3Laboratoire de Physicochimie del’Atmosphère, Université du Littoral Côte d’Opale, Dunkerque, France
4Space Information and Simulation Technology Lab, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing, China

Tóm tắt

Based on a new spectrophone configuration using a single microresonator (mR) in “on beam” quartz-enhanced photoacoustic spectroscopy (QEPAS), referred to “half on beam QEPAS”, a classical acoustic model originated from “orifice ended tube” was introduced to model and optimize the mR geometrical parameters. The calculated optimum mR parameters were in good agreement with the experimental results obtained in “half on beam” as well as conventional “on beam” QEPAS approaches through monitoring of atmospheric H2O vapor absorption. In addition, spectrophone performances of different QEPAS configurations (off beam, on beam and half on beam) were compared in terms of signal-to-noise ratio (SNR) gain.

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Applied Physics B

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