Transversely Excited Multipass Photoacoustic Cell Using Electromechanical Film as Microphone

A novel multipass photoacoustic cell with five stacked electromechanical films as a microphone has been constructed, tested and characterized. The photoacoustic cell is an open rectangular structure with two steel plates facing each other. The longitudinal acoustic resonances are excited transversel...

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Detalles Bibliográficos
Autores principales: Saarela, Jaakko, Sand, Johan, Sorvajärvi, Tapio, Manninen, Albert, Toivonen, Juha
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International (MDPI) 2010
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3247707/
https://www.ncbi.nlm.nih.gov/pubmed/22219662
http://dx.doi.org/10.3390/s100605294
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author Saarela, Jaakko
Sand, Johan
Sorvajärvi, Tapio
Manninen, Albert
Toivonen, Juha
author_facet Saarela, Jaakko
Sand, Johan
Sorvajärvi, Tapio
Manninen, Albert
Toivonen, Juha
author_sort Saarela, Jaakko
collection PubMed
description A novel multipass photoacoustic cell with five stacked electromechanical films as a microphone has been constructed, tested and characterized. The photoacoustic cell is an open rectangular structure with two steel plates facing each other. The longitudinal acoustic resonances are excited transversely in an optical multipass configuration. A detection limit of 22 ppb (10(−9)) was achieved for flowing NO(2) in N(2) at normal pressure by using the maximum of 70 laser beams between the resonator plates. The corresponding minimum detectable absorption and the normalized noise-equivalent absorption coefficients were 2.2 × 10(−7) cm(−1) and 3.2 × 10(−9) cm(−1)WHz(−1/2), respectively.
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spelling pubmed-32477072012-01-04 Transversely Excited Multipass Photoacoustic Cell Using Electromechanical Film as Microphone Saarela, Jaakko Sand, Johan Sorvajärvi, Tapio Manninen, Albert Toivonen, Juha Sensors (Basel) Article A novel multipass photoacoustic cell with five stacked electromechanical films as a microphone has been constructed, tested and characterized. The photoacoustic cell is an open rectangular structure with two steel plates facing each other. The longitudinal acoustic resonances are excited transversely in an optical multipass configuration. A detection limit of 22 ppb (10(−9)) was achieved for flowing NO(2) in N(2) at normal pressure by using the maximum of 70 laser beams between the resonator plates. The corresponding minimum detectable absorption and the normalized noise-equivalent absorption coefficients were 2.2 × 10(−7) cm(−1) and 3.2 × 10(−9) cm(−1)WHz(−1/2), respectively. Molecular Diversity Preservation International (MDPI) 2010-05-26 /pmc/articles/PMC3247707/ /pubmed/22219662 http://dx.doi.org/10.3390/s100605294 Text en © 2010 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Saarela, Jaakko
Sand, Johan
Sorvajärvi, Tapio
Manninen, Albert
Toivonen, Juha
Transversely Excited Multipass Photoacoustic Cell Using Electromechanical Film as Microphone
title Transversely Excited Multipass Photoacoustic Cell Using Electromechanical Film as Microphone
title_full Transversely Excited Multipass Photoacoustic Cell Using Electromechanical Film as Microphone
title_fullStr Transversely Excited Multipass Photoacoustic Cell Using Electromechanical Film as Microphone
title_full_unstemmed Transversely Excited Multipass Photoacoustic Cell Using Electromechanical Film as Microphone
title_short Transversely Excited Multipass Photoacoustic Cell Using Electromechanical Film as Microphone
title_sort transversely excited multipass photoacoustic cell using electromechanical film as microphone
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3247707/
https://www.ncbi.nlm.nih.gov/pubmed/22219662
http://dx.doi.org/10.3390/s100605294
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