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The scanning flow DMA

Collins, Don R. and Nenes, Athanasios and Flagan, Richard C. and Seinfeld, John H. (2000) The scanning flow DMA. Journal of Aerosol Science, 31 (10). pp. 1129-1144. ISSN 0021-8502. doi:10.1016/S0021-8502(99)00576-5.

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A new method of DMA operation has been implemented in which the flow rates are continuously changed in conjunction with the applied voltage. By optimizing the flow and voltage ramps, improvements can be made in the DMA's measurable size range, counting statistics, resolution, or a partial combination of each of these. Detailed modeling of this technique suggests that errors on the order of 2 to 5% result from incorrect assumptions concerning the flow profile within the DMA. The experimental system enabled accurate control of flows that were varied by an order of magnitude in as little as 30 s. Excellent agreement was obtained between mobility distributions recovered from a voltage ramp, a flow ramp, and a combined voltage and flow ramp. Slight deviations were apparent in the recovered data as the flow scan time was reduced from 60 to 30 s.

Item Type:Article
Related URLs:
URLURL TypeDescription
Nenes, Athanasios0000-0003-3873-9970
Flagan, Richard C.0000-0001-5690-770X
Seinfeld, John H.0000-0003-1344-4068
Additional Information:© 2000 Elsevier. (First received 25 February 1999; and in final form 3 December 1999) The authors gratefully acknowledge the assistance of Jian Wang, Patrick Chuang, and Jim Smith for their help in the construction and implementation of this measurement system. This work has been supported by the National Science Foundation Grant ATM-9614105, and by the Office of Naval Research Grant N00014-91-0119.
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-91-0119
Issue or Number:10
Record Number:CaltechAUTHORS:20150806-170014061
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Official Citation:Don R. Collins, Athanasios Nenes, Richard C. Flagan, John H. Seinfeld, THE SCANNING FLOW DMA, Journal of Aerosol Science, Volume 31, Issue 10, October 2000, Pages 1129-1144, ISSN 0021-8502, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59291
Deposited By: Irina Meininger
Deposited On:08 Aug 2015 03:23
Last Modified:10 Nov 2021 22:18

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