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Proceedings Article

An improved open path multi-reflection cell for the measurement of NO2 and NO3

[+] Author Affiliations
Dominique Ritz

Ruprecht-Karls-Univ. Heidelberg (France)

Michael Hausmann, Ulrich Platt

Ruprecht-Karls-Univ. Heidelberg (Germany)

Proc. SPIE 1715, Optical Methods in Atmospheric Chemistry, 200 (February 12, 1993); doi:10.1117/12.140211
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From Conference Volume 1715

  • Optical Methods in Atmospheric Chemistry
  • Harold I. Schiff; Ulrich Platt
  • Berlin, Federal Republic of Germany | June 15, 1992

abstract

Multireflection cells based on the development by White (1942, 1976) are becoming increasingly popular for studying the chemical composition of the ambient atmosphere by long path UV-visible absorption spectroscopy (DOAS). This is partly due to the special property of the design to eliminate negative effects of vibration and atmospheric fluctuations on the optical quality of the cell. The main parameters limiting the number of reflections (and thus achievable optical length) as well as the vibration tolerance are the size of the main mirror and the number of loci that can be fitted on its surface. Also limiting can be the total reflectivity of the mirrors. Here we present a design variant simplifying the optical alignment of the cell by replacing two pairs of about 90-deg mirrors by quartz prisms and adding a third prism to further increase the stability of the system by a factor of two. An application of a practical design based on those principles to the simultaneous measurement of NO2, NO3, and oxygen dimers (O4) is presented.

© (1993) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Dominique Ritz ; Michael Hausmann and Ulrich Platt
"An improved open path multi-reflection cell for the measurement of NO2 and NO3", Proc. SPIE 1715, Optical Methods in Atmospheric Chemistry, 200 (February 12, 1993); doi:10.1117/12.140211; http://dx.doi.org/10.1117/12.140211


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