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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MDPI AG
2010-05-01
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Online Access: | http://www.mdpi.com/1424-8220/10/6/5294/ |
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doaj-f520da0943b84db7a3050c9342b8fa222020-11-24T21:41:21ZengMDPI AGSensors1424-82202010-05-011065294530710.3390/s100605294Transversely Excited Multipass Photoacoustic Cell Using Electromechanical Film as MicrophoneJaakko SaarelaJohan SandTapio SorvajärviAlbert ManninenJuha ToivonenA 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 NO2 in N2 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−1WHz−1/2, respectively. http://www.mdpi.com/1424-8220/10/6/5294/multipassphotoacousticspectroscopylongitudinal resonancetransversal excitationtransducerelectromechanical film microphoneEMFIT film |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jaakko Saarela Johan Sand Tapio Sorvajärvi Albert Manninen Juha Toivonen |
spellingShingle |
Jaakko Saarela Johan Sand Tapio Sorvajärvi Albert Manninen Juha Toivonen Transversely Excited Multipass Photoacoustic Cell Using Electromechanical Film as Microphone Sensors multipass photoacoustic spectroscopy longitudinal resonance transversal excitation transducer electromechanical film microphone EMFIT film |
author_facet |
Jaakko Saarela Johan Sand Tapio Sorvajärvi Albert Manninen Juha Toivonen |
author_sort |
Jaakko Saarela |
title |
Transversely Excited Multipass Photoacoustic Cell Using Electromechanical Film as Microphone |
title_short |
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_sort |
transversely excited multipass photoacoustic cell using electromechanical film as microphone |
publisher |
MDPI AG |
series |
Sensors |
issn |
1424-8220 |
publishDate |
2010-05-01 |
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 NO2 in N2 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−1WHz−1/2, respectively. |
topic |
multipass photoacoustic spectroscopy longitudinal resonance transversal excitation transducer electromechanical film microphone EMFIT film |
url |
http://www.mdpi.com/1424-8220/10/6/5294/ |
work_keys_str_mv |
AT jaakkosaarela transverselyexcitedmultipassphotoacousticcellusingelectromechanicalfilmasmicrophone AT johansand transverselyexcitedmultipassphotoacousticcellusingelectromechanicalfilmasmicrophone AT tapiosorvajarvi transverselyexcitedmultipassphotoacousticcellusingelectromechanicalfilmasmicrophone AT albertmanninen transverselyexcitedmultipassphotoacousticcellusingelectromechanicalfilmasmicrophone AT juhatoivonen transverselyexcitedmultipassphotoacousticcellusingelectromechanicalfilmasmicrophone |
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1725922518213066752 |