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  Electrical properties of cometary dust particles derived from line shapes of TOF-SIMS spectra measured by the ROSETTA/COSIMA instrument

Hornung, K., Mellado, E. M., Paquette, J., Fray, N., Fischer, H., Stenzel, O. J., et al. (2020). Electrical properties of cometary dust particles derived from line shapes of TOF-SIMS spectra measured by the ROSETTA/COSIMA instrument. Planetary and Space Science, 182: 104758. doi:10.1016/j.pss.2019.104758.

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Hornung, Klaus, Autor
Mellado, Eva Maria, Autor
Paquette, John1, Autor           
Fray, Nicolas, Autor
Fischer, Henning1, Autor           
Stenzel, Oliver Joachim1, Autor           
Baklouti, Donia, Autor
Merouane, Sihane1, Autor           
Langevin, Yves, Autor
Bardyn, Anais, Autor
Engrand, Cecile, Autor
Cottin, Hervé, Autor
Thirkell, Laurent, Autor
Briois, Christelle, Autor
Modica, Paola, Autor
Rynö, Jouni, Autor
Silen, Johan, Autor
Schulz, Rita, Autor
Siljeström, Sandra, Autor
Lehto, Harry, Autor
Varmuza, Kurt, AutorKoch, Andreas, AutorKissel, Jochen1, Autor           Hilchenbach, Martin1, Autor            mehr..
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

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Schlagwörter: -
 MPIS_PROJECTS: ROSETTA: COSIMA
 Zusammenfassung: Between Aug. 2014 and Sept. 2016, while ESA's cornerstone mission Rosetta was operating in the vicinity of the nucleus and in the coma of comet 67P/Churyumov-Gerasimenko, the COSIMA instrument collected a large number of dust particles with diameters up to a millimeter. Positive or negative ions were detected by a time-of-flight secondary ion mass spectrometer (TOF-SIMS) and the composition of selected particles was deduced. Many of the negative ion mass spectra show, besides mass peaks at the correct position, an additional, extended contribution at the lower mass side caused by partial charging of the dust. This effect, usually avoided in SIMS applications, can in our case be used to obtain information on the electrical properties of the collected cometary dust particles, such as the specific resistivity (ρr>1.2⋅1010Ωm) and the real part of the relative electrical permittivity (εr<1.2). From these values a lower limit for the porosity is derived (P>0.8).

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Sprache(n): eng - English
 Datum: 2020
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1016/j.pss.2019.104758
 Art des Abschluß: -

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Titel: Planetary and Space Science
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Amsterdam : Elsevier B.V.
Seiten: - Band / Heft: 182 Artikelnummer: 104758 Start- / Endseite: - Identifikator: ISSN: 0032-0633
CoNE: https://pure.mpg.de/cone/journals/resource/954925434422