Atmospheric Measurement Techniques www.atmos-meas-tech.net 1867-1381 1867-8548 2 1 2009 10.5194/amt-2-243-2009 http://www.atmos-meas-tech.net/2/243/2009/ http://www.atmos-meas-tech.net/2/243/2009/amt-2-243-2009.html http://www.atmos-meas-tech.net/2/243/2009/amt-2-243-2009.pdf 243 258 2009-06-16 Experimental characterization of the COndensation PArticle counting System for high altitude aircraft-borne application R. Weigel weigelr@uni-mainz.de M. Hermann J. Curtius C. Voigt S. Walter T. Böttger B. Lepukhov G. Belyaev S. Borrmann Max Planck Institute for Chemistry, Particle Chemistry Department, Mainz, Germany Institute for Atmospheric Physics, Johannes Gutenberg-University, Mainz, Germany Leibniz Institute for Tropospheric Research, Leipzig, Germany Institute for Atmosphere and Environment, Johann Wolfgang Goethe University, Frankfurt, Germany German Aerospace Center (DLR), Institute for Atmospheric Physics, Oberpfaffenhofen, Germany Myasishchev Design Bureau, Moscow, Russia 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 μm. 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