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Automatic absorption lineshape recording device applied to theJ: 2 → 3 OCS gas transition

Published online by Cambridge University Press:  15 August 1999

D. Breche ,
B. Lamalle ,
F. Truchetet  and
P. Goulet
D. Breche*
Affiliation:
Laboratoire d'Électronique, Informatique et Image (LE2I), Institut Universitaire de Technologie, 12 rue de la Fonderie, 71200 Le Creusot, France
B. Lamalle
Affiliation:
Laboratoire d'Électronique, Informatique et Image (LE2I), Institut Universitaire de Technologie, 12 rue de la Fonderie, 71200 Le Creusot, France
F. Truchetet
Affiliation:
Laboratoire d'Électronique, Informatique et Image (LE2I), Institut Universitaire de Technologie, 12 rue de la Fonderie, 71200 Le Creusot, France
P. Goulet
Affiliation:
Laboratoire d'Électronique, Informatique et Image (LE2I), Institut Universitaire de Technologie, 12 rue de la Fonderie, 71200 Le Creusot, France
*
[email protected]
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Abstract

This paper describes an automatic lineshape recording device applied to thestudy of the rotational molecular transition J: 2 → 3 of OCS gasat 36.489 GHz. The device includes a microwave oversized cell associatedwith a DC voltage amplifier and a microcontroller stabilizer. Itparticularly permits the automatic recording of the lineshape with anaccuracy better than 1 kHz for the frequency and 1 mV for the voltage.By fitting with a Lorentz or Voigt profile, we directly determine theevolution of the shape, the center frequency, the broadening parameter andthe intensity of the line versus the pressure. At low pressure, the Dopplerbroadening effect has been measured.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 7 , Issue 2 , August 1999 , pp. 189 - 196
Copyright
© EDP Sciences, 1999

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References

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