American Association for Aerosol Research - Abstract Submission

AAAR 38th Annual Conference
October 5 - October 9, 2020

Virtual Conference

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Operation of a Condensation Particle Counter under the Low-pressure Condition

FAN MEI, Maynard Havlicek, Mikhail Pekour, Andrea Tiwari, Jason Tomlinson, Beat Schmid, Oliver F. Bischof, Patrick Roth, Pacific Northwest National Laboratory

     Abstract Number: 14
     Working Group: Instrumentation and Methods

Abstract
Given that the aerosol population is heterogeneous in the vertical and horizontal dimension, detailed time and space-resolved measurements are needed to characterize aerosol properties adequately. Traditionally, condensation particle counters (CPC) have been used to measure the aerosol particle number concentration. In this study, the counting efficiency of a TSI 3789 CPC operated with water as working fluid was assessed in the pressure range of 100-1000 hPa. This study will also explore the counting efficiency dependence on the aerosol composition. Additionally, the counting efficiency under different operating temperatures will also be investigated. The main goal of our study is to determine the operational envelope of the CPC for in-situ airborne measurements.