Title :
Enhancing sensitivity in tuning fork photoacoustic spectroscopy systems
Author :
Firebaugh, Samara L. ; Roignant, Francois ; Terray, Eugene A.
Author_Institution :
Dept. of Electr. & Comput. Eng., United States Naval Acad., Annapolis, MD, USA
Abstract :
A fast, high-sensitivity detector is required for studies of environmentally relevant gases. Photoacoustic spectroscopy (PAS), an absorption spectroscopy technique in which absorption is detected as sound, is explored as a possible solution. A tuning-fork based PAS sensor is modeled using COMSOL Multiphysics. The model combines the acoustic and piezoelectric modules and also includes viscous damping. The model is validated by comparison to experimental data. Acoustic resonator tubes have been found to enhance the signal in these systems. Here the model is applied to determine the dependence of the signal on resonator tube dimensions.
Keywords :
geophysical techniques; photoacoustic spectroscopy; COMSOL Multiphysics; absorption spectroscopy technique; acoustic module; finite-element modeling; piezoelectric module; piezoelectric sensor; resonator tube dimensions; trace gas measurement; tuning fork photoacoustic spectroscopy systems; tuning-fork based PAS sensor; viscous damping; Acoustic sensors; Acoustic signal detection; Gases; Laser tuning; Optical modulation; Optical resonators; Resonance; Sea measurements; Spectroscopy; Vibrations; finite-element modeling; photoacoustic spectroscopy; trace gas measurement; tuning fork, piezoelectric sensor;
Conference_Titel :
Sensors Applications Symposium (SAS), 2010 IEEE
Conference_Location :
Limerick
Print_ISBN :
978-1-4244-4988-0
Electronic_ISBN :
978-1-4244-4989-7
DOI :
10.1109/SAS.2010.5439407
