Buffer structure optimization of the photoacoustic cell for trace gas detection

Yang Cai, Norhana Arsad, Min Li, Yao Wang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The equivalent four-pole network model is used to simulate one-dimension longitudinal acoustic resonator with different buffer diameters and lengths, aiming to reach a theoretic model which is able to estimate the optimal buffer geometry. In experiments, the buffer volumes are decreased gradually by filling a set of aluminum rings with different inner diameters and lengths into the buffers to get the desired dimensions. The experimental results show that the average deviation of 1. 1% is obtained between the experimental results and the theoretical simulation at the buffer length of 30 mm. Experiments show that the minimum background signal occurs when the buffer length is equal to a quarter of the acoustic wavelength (λ/4). The amplitude of the photoacoustic signal is barely influenced when dbuf>3dres. Considering that oversize of photoacoustic cell needs more measuring gas and more material, the buffer diameter can be deduced to dbuf≈3dres. Therefore, smaller photoacoustic cell is desirable.

Original languageEnglish
Pages (from-to)233-237
Number of pages5
JournalOptoelectronics Letters
Volume9
Issue number3
DOIs
Publication statusPublished - 2013

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Photoacoustic effect
Buffers
buffers
Gases
optimization
cells
gases
Acoustic resonators
Poles
Acoustics
Experiments
Aluminum
Wavelength
Geometry
acoustics
poles
resonators
aluminum
deviation
rings

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics

Cite this

Buffer structure optimization of the photoacoustic cell for trace gas detection. / Cai, Yang; Arsad, Norhana; Li, Min; Wang, Yao.

In: Optoelectronics Letters, Vol. 9, No. 3, 2013, p. 233-237.

Research output: Contribution to journalArticle

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