Experimental characterization of the COndensation PArticle counting System for high altitude aircraft-borne application
- A characterization of the ultra-fine aerosol particle counter COPAS (COndensation PArticle counting System) for operation on board the Russian high altitude research aircraft M-55 Geophysika is presented. The COPAS instrument consists of an aerosol inlet and two dual-channel continuous flow Condensation Particle Counters (CPCs) operated with the chlorofluorocarbon FC-43. It operates at pressures between 400 and 50 hPa for aerosol detection in the particle diameter (dp) range from 6 nm up to 1 micro m. The aerosol inlet, designed for the M-55, is characterized with respect to aspiration, transmission, and transport losses. The experimental characterization of counting efficiencies of three CPCs yields dp50 (50% detection particle diameter) of 6 nm, 11 nm, and 15 nm at temperature differences (DeltaT) between saturator and condenser of 17°C, 30°C, and 33°C, respectively. Non-volatile particles are quantified with a fourth CPC, with dp50=11 nm. It includes an aerosol heating line (250°C) to evaporate H2SO4-H2O particles of 11 nm<dp<200 nm at pressures between 70 and 300 hPa. An instrumental in-flight inter-comparison of the different COPAS CPCs yields correlation coefficients of 0.996 and 0.985. The particle emission index for the M-55 in the range of 1.4–8.4×10 16 kg -1 fuel burned has been estimated based on measurements of the Geophysika's own exhaust.
Author: | Ralf Weigel, Markus Hermann, Joachim CurtiusORCiDGND, Christiane Voigt, Saskia Walter, Thomas Böttger, Boris Lepukhov, Gennady Belyaev, Stephan BorrmannORCiDGND |
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URN: | urn:nbn:de:hebis:30-68139 |
DOI: | https://doi.org/10.5194/amt-2-243-2009 |
ISSN: | 1867-8548 |
ISSN: | 1867-1381 |
Parent Title (English): | Atmospheric measurement techniques : AMT |
Publisher: | European Geosciences Union |
Place of publication: | Katlenburg-Lindau |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2009/06/16 |
Date of first Publication: | 2009/06/16 |
Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Release Date: | 2009/08/10 |
Volume: | 2 |
Issue: | 1 |
Page Number: | 16 |
First Page: | 243 |
Last Page: | 258 |
Note: | © Author(s) 2008. This work is distributed under the Creative Commons Attribution 3.0 License. |
HeBIS-PPN: | 214745635 |
Institutes: | Geowissenschaften / Geographie / Geowissenschaften |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften |
Licence (German): | ![]() |