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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Preprints
https://doi.org/10.5194/amt-2020-54
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-2020-54
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  08 Apr 2020

08 Apr 2020

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A revised version of this preprint was accepted for the journal AMT and is expected to appear here in due course.

Characterization of a Non-Thermal Plasma Source for the Use as a Mass Spec Calibration Tool and Non-Radioactive Aerosol Charger

Christian Tauber1, David Schmoll1, Johannes Gruenwald2, Sophia Brilke1, Peter Josef Wlasits1, Paul Martin Winkler1, and Daniela Wimmer1 Christian Tauber et al.
  • 1Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Vienna, Austria
  • 2Gruenwald Laboratories GmbH, Taxberg 50, 5660 Taxenbach, Austria

Abstract. In this study the charging efficiency of a radioactive and a non-radioactive plasma neutralizer (Gilbert Mark I plasma charger) have been investigated at various aerosol flow rates. The results were compared to classic theoretical approaches. In addition, the chemical composition and electrical mobilities of the charger ions have been examined using an atmospheric pressure interface – time-of-flight mass spectrometer (APi-TOF MS). A comparison of the different neutralization methods revealed an increased charging efficiency for negatively charged particles using the non-radioactive plasma charger with nitrogen as working gas. The mobility and mass spectrometric measurements show that the generated neutralizer ions are of the same mobilities and composition independent of the charging mechanism. It was the first time that the Gilbert Mark I plasma charger was characterized in comparison to the standard TSI X-Ray (TSI Inc, Model 3088) and a radioactive americium neutralizer. We observed that the plasma charger with nitrogen as working gas can enhance the charging probability for sub-10 nm particles. Consequently, the limit of detection of differential or scanning mobility particle sizers can be increased down towards to smaller sizes with the Gilbert Mark I plasma charger.

Christian Tauber et al.

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Christian Tauber et al.

Christian Tauber et al.

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Latest update: 23 Sep 2020
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Short summary
In this paper we show that a commercially available plasma charger with nitrogen as working gas can enhance the charging probability for sub-10 nm particles. In addition, the charger ion mobilities and the chemical composition have been examined using an atmospheric pressure interface – time-of-flight mass spectrometer (APi-TOF MS) and comparison of the experimental results revealed that the generated neutralizer ions are not dependent on the charging mechanism.
In this paper we show that a commercially available plasma charger with nitrogen as working gas...
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