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2008 | 114 | 6A | A-211-A-216
Article title

Windowless Open Photoacoustic Helmholtz Cell

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Content
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Languages of publication
EN
Abstracts
EN
A phenomenon which is usually considered as the main disadvantage of photoacoustic Helmholtz cells is photoacoustic background signal resulting from the light absorption by the cell windows. Although there are methods which reduce this background signal, e.g. light wavelength modulation or time domain filtering of the photoacoustic response from the sample, the methods are limited to particular applications, and none of them would completely remove the mentioned background signal. The paper presents design of a windowless open photoacoustic Helmholtz cell, and preliminary results of frequency response measurements of such a cell. Removal of the windows eliminated the main source of the photoacoustic background signal. Additionally, the proposed design allows for unrestricted or forced flow of the fluid filling the cell. As a result, the cell can be easily adapted for continuous, real-time photoacoustic measurements. Under proper selection of the cell dimensions, Q-factors of such open photoacoustic Helmholtz resonators are comparable to the Q-factors of corresponding closed Helmholtz cells.
Keywords
EN
Publisher

Year
Volume
114
Issue
6A
Pages
A-211-A-216
Physical description
Dates
published
2008-12
Contributors
author
  • Institute of Electronic Systems, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw, Poland
References
  • 1. Y.-H. Pao, Optoacoustic Spectroscopy and Detection, Academic Press, New York 1977
  • 2. P.M. Morse, K.U. Ingard, Theoretical Acoustics, Princeton University Press, Princeton 1986
  • 3. E.M. Monahan Jr., A.W. Nolle, J. Appl. Phys. 48, 3519 (1977)
  • 4. D. Ducharme, A. Tessier, R.M. Leblanc, Rev. Sci. Instrum. 50, 1461 (1979)
  • 5. T. Starecki, A. Burd, S. Misiaszek, K. Opalska, M. Radtke, M. Ramotowski, in: Proc. II KKE, Kołobrzeg (Poland) 2003, Wydział Elektroniki Politechniki Koszalińskiej, Koszalin 2003, p. 653
  • 6. T. Starecki, J. Acoust. Soc. Am. 122, 2118 (2007)
  • 7. T. Starecki, K. Opalska, A. Burd, S. Misiaszek, M. Ramotowski, Proc. SPIE 5948, 509 (2005)
  • 8. S.W. Rienstra, A. Hirschberg, An Introduction to Acoustics, extended and improved IWDE report 92-06, Eindhoven University of Technology, Eindhoven 2002
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv114n6a34kz
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