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A DMA-train for precision measurement of sub 10-nm aerosol dynamics

Autor(en)
Dominik Stolzenburg, Gerhard Steiner, Paul Winkler
Abstrakt

Measurements of aerosol dynamics in the sub-10nm size range are crucially important for quantifying the impactof new particle formation onto the global budget of cloud condensation nuclei. Here we present the development and char-acterization of a differential mobility analyzer - train (DMA-train), operating six DMAs in parallel for high time-resolutionparticle size-distribution measurements below 10nm. The DMAs are operated at six different but fixed voltages and hencesizes, together with six state-of-the-art condensation particle counters. Two Airmodus A 10 particle size magnifiers (PSM) are5used for channels below 2.5nmwhile sizes above 2.5nmare detected by TSI 3776 butanol or TSI 3788 water based CPCs. Wereport the transfer functions and characteristics of six identical Grimm S-DMAs as well as the calibration of a butanol-basedTSI model 3776 CPC, a water-based TSI model 3788 CPC and an Aimodus A10 PSM. We find cut-off diameters similar tothose reported in the literature. The performance of the DMA-train is tested with a rapidly changing aerosol of a tungsten oxideparticle generator during warm-up. Additionally we report a measurement of new particle formation taken during a nucleation10event in the CLOUD chamber experiment at CERN. We find that the DMA-train is able to bridge the gap between currentlywell-established measurement techniques in the cluster-particle transition regime, providing high time-resolution and accuratesize information of neutral and charged particles even at atmospheric particle concentrations.

Organisation(en)
Aerosolphysik und Umweltphysik
Journal
Atmospheric Measurement Techniques
Band
10
Seiten
1639–1651
Anzahl der Seiten
13
ISSN
1867-1381
DOI
https://doi.org/10.5194/amt-10-1639-2017
Publikationsdatum
05-2017
Peer-reviewed
Ja
ÖFOS 2012
103039 Aerosolphysik
Schlagwörter
ASJC Scopus Sachgebiete
Atmospheric Science
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/f7b955a7-928b-493a-8f70-dafe353d6cbb