Transversely excited multipass photoacoustic cell using electromechanical film as microphone
Näytä kaikki kuvailutiedot
Tiedostot
|
URN:
|
http://URN.fi/URN:NBN:fi:tty-201104151609
|
|
Nimeke:
|
Transversely excited multipass photoacoustic cell using electromechanical film as microphone |
|
Tekijä:
|
Saarela, Jaakko; Sand, Johan; Sorvajärvi, Tapio; Manninen, Albert; Toivonen, Juha |
|
Julkaisun tyyppi:
|
Artikkeli - Article |
|
Julkaisuaika:
|
2010 |
|
DOI:
|
http://dx.doi.org/10.3390/s100605294
|
|
Kuvaus:
|
Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0/ |
|
Yliopisto:
|
Tampereen teknillinen yliopisto - Tampere University of Technology |
|
Tiedekunta:
|
Luonnontieteiden ja ympäristötekniikan tiedekunta – Faculty of Science and Environmental Engineering |
|
Laitos:
|
Fysiikan laitos |
|
Tiivistelmä:
|
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 x 10−7 cm−1 and 3:2 x 10−9 cm−1WHz−1/2, respectively. |
|
Tekijänoikeudet:
|
This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited. |
Viite kuuluu kokoelmiin:
Näytä kaikki kuvailutiedot