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A Differential Mobility Analyzer (DMA) System for Submicron Aerosol Measurements at Ambient Relative Humidity

Wang, Jian and Flagan, Richard C. and Seinfeld, John H. (2003) A Differential Mobility Analyzer (DMA) System for Submicron Aerosol Measurements at Ambient Relative Humidity. Aerosol Science and Technology, 37 (1). pp. 46-52. ISSN 0278-6826. doi:10.1080/02786820300891.

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A new differential mobility analyzer (DMA) system for measuring submicron aerosol size distribution at ambient relative humidity (RH), with special attention to implementation on aircraft, is described. The system includes an active RH controller, a cylindrical differential mobility analyzer (CDMA), and a condensation particle counter. A cascade controller consisting of 2 Proportional-Integral-Differential (PID) modules maintains the RH inside the CDMA at ambient RH. The flows are controlled with feedback PID controllers, which compensate for the variation of pressure as the aircraft changes altitude. This system was integrated into the CIRPAS Twin Otter aircraft and used to measure ambient size distributions during the ACE-Asia experiment, which was carried out from March to May 2001 in Japan.

Item Type:Article
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Flagan, Richard C.0000-0001-5690-770X
Seinfeld, John H.0000-0003-1344-4068
Additional Information:© 2002 American Association for Aerosol Research. Received 27 December 2001; accepted 6 May 2002. The authors extend special appreciation to the CIRPAS crew for their help in integrating the DMA system into Twin Otter aircraft: Haflidi Jonsson, Bob Rogell, Dennis Hamaker, Nava Roy, and Roy Woods. This work was supported by the Office of Naval Research.
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Office of Naval Research (ONR)UNSPECIFIED
Issue or Number:1
Record Number:CaltechAUTHORS:20170408-163738887
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:76221
Deposited By: 1Science Import
Deposited On:08 Mar 2018 22:36
Last Modified:15 Nov 2021 16:58

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