A Novel Wide Temperature Range Photoacoustic Cell for Molecules in the Vapour Phase

  • H. Jalink
  • D. Bicanic
Conference paper

Summary

A photoacoustic cell operating on the principle of a heat pipe has been designed and tested. The new cell is of a simple, compact design and its operational temperature range restricted by the choice of material from which the heater zone of the cell is constructed. The cell windows and microphone are kept at room temperature; morevover condensation of vapour on these components is prevented due to the presence of a sharp interface between the buffer gas and vapour. The cell can be used at the second longitudinal resonance (the pipe is closed at both ends). The usability of the photoacoustic heat pipe (PAHP) is demonstrated by observing an absorption spectrum of geraniol, C10H18O, in the 9 µm and 10 µm band of the CO2-laser. This photoacoustic vapour spectrum is compared qualitatively to that of a vapour phase spectrum obtained by FTIR.

Keywords

Heat Pipe Zinc Selenide Microphone Signal Waveguide Laser Acoustic Channel 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© ECSC, EEC, EAEC, Brussels and Luxembourg 1989

Authors and Affiliations

  • H. Jalink
    • 1
  • D. Bicanic
    • 1
  1. 1.Department of Physics and MeteorologyAgricultural UniversityWageningenThe Netherlands

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