Computer Science – Performance
Scientific paper
Jun 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011mss..confeta06l&link_type=abstract
"International Symposium On Molecular Spectroscopy, 66th Meeting, Held 20-24 June, 2011 at Ohio State University. http://molspec
Computer Science
Performance
Infrared/Raman
Scientific paper
The OA-ICOS cavity consisted of two 1" high reflectivity spherical mirrors with 1 m radius of curvature, separated by a 0.5-m long quartz coated stainless steel tube. The mirrors reflectivity was > 99.996% at 1435 nm as specified by the manufacturer (Layertec, GmbH). The effective optical path length of the OA-ICOS approach was determined with direct absorption signal intensity of the pure H2O vapor line at 6965.80233 cm-1 and was found to be 1.263 km.
The OH radicals were generated with the help of a 2.45 GHz microwave discharge in water vapor flow under low pressure (1 mbar) to evaluate the developed OA-ICOS performance. The OH radical concentration of 7.28 e+13 OH/cm3 was determined using calibration with a close H2O absorption line at 6965.80 cm-1. The detection limit, deduced from the signal to noise ratio, was 3.86 e+11 OH/cm3. Experimental instrument detail and the preliminary measurement results will be presented and discussed.
Chen Weidong
Coeur Cecile
Fertein Eric
Lengignon Christophe
Petitprez Denis
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