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Concept for a New Cloud Condensation Nucleus (CCN) Spectrometer

VanReken, Timothy M. and Nenes, Athanasios and Flagan, Richard C. and Seinfeld, John H. (2004) Concept for a New Cloud Condensation Nucleus (CCN) Spectrometer. Aerosol Science and Technology, 38 (7). pp. 639-654. ISSN 0278-6826.

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The concept of a new cloud condensation nucleus (CCN) spectrometer based on modifications to the original design of Fukuta and Saxena is presented. The key modifications include introducing a trapezoidal geometry and orienting the chamber vertically. A series of simulations demonstrate the broadening of the effective range of the instrument to include supersaturations lower than those reported for the original instrument, without reducing the maximum resolvable supersaturation. A design criterion is developed to eliminate configurations that would result in secondary flows in the growth chamber resulting from buoyancy effects. Using instrument configurations that satisfy this criterion, the effects of variations in the chamber geometry, the imposed temperature gradient, and the total volumetric flow are evaluated. A new configuration is identified that could produce real-time CCN spectra with an effective range at least including supersaturations between 0.07% and 1.2%.

Item Type:Article
VanReken, Timothy M.0000-0002-2645-4911
Nenes, Athanasios0000-0003-3873-9970
Flagan, Richard C.0000-0001-5690-770X
Seinfeld, John H.0000-0003-1344-4068
Additional Information:© 2004 American Association for Aerosol Research. Received 9 October 2003; accepted 29 April 2004. This work was supported by the Office of Naval Research and the EPA STAR Graduate Fellowship Program.
Funding AgencyGrant Number
Office of Naval Research (ONR)UNSPECIFIED
Environmental Protection Agency (EPA)UNSPECIFIED
Issue or Number:7
Record Number:CaltechAUTHORS:20160219-104557808
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:64608
Deposited By: Katherine Johnson
Deposited On:19 Feb 2016 18:50
Last Modified:03 Oct 2019 09:39

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