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|Document Type: ||Article|
|Title: ||Quantitative analysis of a closed photoacoustic cell that uses a high compliance
|Authors: ||Hodgkinson, Jane|
Dakin, John P.
|Issue Date: ||2005|
|Citation: ||Jane Hodgkinson, Mark Johnson, and John P. Dakin. Quantitative analysis of a closed photoacoustic cell that uses a high compliance piezoelectric transducer. Journal of Applied Physics, 2005, Vol.98, 084908|
|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 678nm laser diode modulated at 110Hz.
We have detected absorbances as low as approximately 3Ã¯Â Â´10 -3 cm -1 (SNR=1),
corresponding to the absorption of light with a modulated power of 50Ã¯Â ÂW|
|Appears in Collections:||Staff publications - School of Engineering|
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