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Quantitative analysis of a closed photoacoustic cell that uses a high compliance piezoelectric transducer

Quantitative analysis of a closed photoacoustic cell that uses a high compliance piezoelectric transducer
Quantitative analysis of a closed photoacoustic cell that uses a high compliance piezoelectric transducer
A treatment of the operation of low-frequency closed photoacoustic cells is presented, which considers the compliance of various cell elements. The optimum detector, according to our predictions, has a sensor whose compliance is large compared to that of the fluid enclosed by the cell.
A simple photoacoustic cell has been built, incorporating a thin-walled piezoelectric cylinder. It was used to test the theory, and demonstrate photoacoustic detection of an absorber in aqueous solution, excited by a low-power 678 nm laser diode modulated at 110 Hz. We have detected absorbances as low as approximately 3×10-3 cm-1 (signal-to-noise ratio=1), corresponding to the absorption of light with a modulated power of 50 µW rms.
0021-8979
0849081-8
Hodgkinson, Jane
ccb8c8c6-a374-4e1a-9997-83cc63531f58
Johnson, Mark
3d0db830-23aa-4083-9105-5f11707959df
Dakin, John P.
04891b9b-5fb5-4245-879e-9e7361adf904
Hodgkinson, Jane
ccb8c8c6-a374-4e1a-9997-83cc63531f58
Johnson, Mark
3d0db830-23aa-4083-9105-5f11707959df
Dakin, John P.
04891b9b-5fb5-4245-879e-9e7361adf904

Hodgkinson, Jane, Johnson, Mark and Dakin, John P. (2005) Quantitative analysis of a closed photoacoustic cell that uses a high compliance piezoelectric transducer. Journal of Applied Physics, 98, 0849081-8. (doi:10.1063/1.2108147).

Record type: Article

Abstract

A treatment of the operation of low-frequency closed photoacoustic cells is presented, which considers the compliance of various cell elements. The optimum detector, according to our predictions, has a sensor whose compliance is large compared to that of the fluid enclosed by the cell.
A simple photoacoustic cell has been built, incorporating a thin-walled piezoelectric cylinder. It was used to test the theory, and demonstrate photoacoustic detection of an absorber in aqueous solution, excited by a low-power 678 nm laser diode modulated at 110 Hz. We have detected absorbances as low as approximately 3×10-3 cm-1 (signal-to-noise ratio=1), corresponding to the absorption of light with a modulated power of 50 µW rms.

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Published date: 2005

Identifiers

Local EPrints ID: 30184
URI: https://eprints.soton.ac.uk/id/eprint/30184
ISSN: 0021-8979
PURE UUID: 0615115a-b407-4c2a-bad2-7c188bd6b145

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Date deposited: 11 May 2006
Last modified: 15 Jul 2019 19:07

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