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- W4386892133 abstract "We report, what we believe to be, a novel miniaturized 3D-printed Y-type resonant photoacoustic cell (YRPAC) consisting of a frustum of cone-type buffer chamber and a cylindrical resonant chamber. The volume of the designed YRPAC is about 7.0 cm 3 , which is only about a half of the T-resonant photoacoustic cell (TRPAC). The finite element simulation of the sound field distribution of the TRPAC and YRPAC based on COMSOL shows that the photoacoustic signal is enhanced with the shape of the buffer chamber changing from the traditional cylinder to a frustum of cone. The photoacoustic spectroscopy (PAS) system, utilizing the YRPAC and TRPAC as the photoacoustic reaction units, a 1653.7 nm distributed feedback (DFB) laser as the excitation light source, a cantilever beam acoustic sensor as the acoustic sensing unit, and a high-speed spectrometer as the demodulation unit, has been successfully developed for high-sensitivity trace CH 4 sensing. When the CH 4 concentration is 1000 ppm, the 2 f signal of YRPAC in the first-order resonance mode is 2.3 nm, which is 1.7 times higher than the 2 f signal amplitude of TRPAC. The detection sensitivity and minimum detection limit for the PAS system are 2.29 pm/ppm and 52.8 parts per billion (ppb) at 100 s of averaging time. The reported YRPAC has higher sensitivity, smaller size, and faster response time compared to the conventional TRPAC, which can provide a new solution for PAS development." @default.
- W4386892133 created "2023-09-21" @default.
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- W4386892133 date "2023-09-27" @default.
- W4386892133 modified "2023-10-13" @default.
- W4386892133 title "Highly sensitive trace gas detection based on a novel miniaturized 3D-printed Y-type resonant photoacoustic cell" @default.
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- W4386892133 doi "https://doi.org/10.1364/oe.502733" @default.
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