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