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| Titel |
Laser filament-induced aerosol formation |
| VerfasserIn |
H. Saathoff, S. Henin, K. Stelmaszczyk, M. Petrarca, R. Delagrange, Z. Hao, J. Lüder, O. Möhler, Y. Petit, P. Rohwetter, M. Schnaiter, J. Kasparian, T. Leisner, J.-P. Wolf, L. Wöste |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 9 ; Nr. 13, no. 9 (2013-05-03), S.4593-4604 |
| Datensatznummer |
250018628
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| Publikation (Nr.) |
 copernicus.org/acp-13-4593-2013.pdf |
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| Zusammenfassung |
| Using the aerosol and cloud simulation chamber AIDA, we investigated the
laser filament induced particle formation in ambient air, humid synthetic
air, humid nitrogen, argon–oxygen mixture, and pure argon in order to
simulate the particle formation under realistic atmospheric conditions as
well as to investigate the influence of typical gas-phase atmospheric
constituents on the particle formation. Terawatt laser plasma filaments
generated new particles in the size range 3 to 130 nm with particle
production rates ranging from 1 × 107 to 5 × 109 cm−3 plasma s−1
for the given experimental conditions. In all cases the particle
formation rates increased exponentially with the water content of the gas
mixture. Furthermore, the presence of a few ppb of trace gases like SO2
and α-pinene clearly enhanced the particle yield by number, the
latter also by mass. Our findings suggest that new particle formation is
efficiently supported by oxidized species like acids generated by the
photoionization of both major and minor components of the air, including
N2, NH3, SO2 and organics. |
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