Synchronous detection of multiple optical characteristics of atmospheric aerosol by coupled photoacoustic cavity
Hua-Wei Jin(靳华伟)1,2,3,4, Ren-Zhi Hu(胡仁志)1,†, Pin-Hua Xie(谢品华)1,‡, and Ping Luo(罗平)2,3,4
1 Key Laboratory of Environmental Optics&Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; 2 Institute of Environment Friendly Materials and Occupational Health, Anhui University of Science and Technology, Wuhu 241000, China; 3 State Key Laboratory of Coal Resources in Western China, Xi'an University of Science and Technology, Xi'an 710054, China; 4 Mechanical Engineering School, Anhui University of Science and Technology, Huainan 232001, China
Abstract Owing to the influence of sampling loss, cavity difference and detecting source, the multi-optical parameter measurement of atmospheric aerosol cannot be detected simultaneously in the same reference environment. In order to solve this problem, a new method of simultaneously detecting the aerosol optical parameters by coupling cavity ring-down spectrometer with photoacoustic spectroscopy is proposed. Firstly, the coupled photoacoustic cavity is formed by the organic fusion of the photoacoustic cavity and the ring-down cavity. Secondly, the integrated design of the coupling spectroscopy system is carried out. Finally, the extinction coefficient and absorption coefficient of aerosol are measured simultaneously by the system, and then the aerosol scattering coefficient and single albedo are calculated indirectly. The accuracy of the system is verified by comparing with the data from the environmental quality monitoring station, which provides a new idea for the detection of multi-optical characteristics of atmospheric aerosol.
(Spectrum and frequency analyzers and filters; acoustical and electrical oscillographs; photoacoustic spectrometers; acoustical delay lines and resonators)
Fund: Project supported by the Major Project of Natural Science Research in Universities of Anhui Province, China (Grant No. KJ2021ZD0052), the Open Foundation of Key Laboratory of Environmental Optics and Technology of Chinese Academy of Sciences (Grant No. 2009DP1730652020-03), and the Research and Development Project of Wuhu Research Institute of Anhui University of Science and Technology, China (Grant No. ALW2020YF17).
Hua-Wei Jin(靳华伟), Ren-Zhi Hu(胡仁志), Pin-Hua Xie(谢品华), and Ping Luo(罗平) Synchronous detection of multiple optical characteristics of atmospheric aerosol by coupled photoacoustic cavity 2022 Chin. Phys. B 31 060703
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