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COSIMA-Rosetta calibration for in situ characterization of 67P/Churyumov-Gerasimenko cometary inorganic compounds
Max Planck Institute for Solar System Research, Germany.
University of Chicago, US.
CNRS, France; University of Paris-Sud, France.
CNRS, France; University of Orléans, France.
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2015 (English)In: Planetary and Space Science, ISSN 0032-0633, E-ISSN 1873-5088, Vol. 117, p. 35-44Article in journal (Refereed) Published
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Abstract [en]

COmetary Secondary Ion Mass Analyzer (COSIMA) is a time-of-flight secondary ion mass spectrometry (TOF-SIMS) instrument on board the Rosetta space mission. COSIMA has been designed to measure the composition of cometary dust particles. It has a mass resolution m/Δm of 1400 at mass 100 u, thus enabling the discrimination of inorganic mass peaks from organic ones in the mass spectra. We have evaluated the identification capabilities of the reference model of COSIMA for inorganic compounds using a suite of terrestrial minerals that are relevant for cometary science. Ground calibration demonstrated that the performances of the flight model were similar to that of the reference model. The list of minerals used in this study was chosen based on the mineralogy of meteorites, interplanetary dust particles and Stardust samples. It contains anhydrous and hydrous ferromagnesian silicates, refractory silicates and oxides (present in meteoritic Ca-Al-rich inclusions), carbonates, and Fe-Ni sulfides. From the analyses of these minerals, we have calculated relative sensitivity factors for a suite of major and minor elements in order to provide a basis for element quantification for the possible identification of major mineral classes present in the cometary particles.

Place, publisher, year, edition, pages
Elsevier, 2015. Vol. 117, p. 35-44
Keywords [en]
comet, cometary dust, interplanetary dust, micrometeorite, Rosetta, time-of-flight secondary ion mass spectrometry (TOF-SIMS)
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Geophysics Astronomy, Astrophysics and Cosmology Analytical Chemistry
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URN: urn:nbn:se:ri:diva-162DOI: 10.1016/j.pss.2015.05.005Scopus ID: 2-s2.0-84945467394OAI: oai:DiVA.org:ri-162DiVA, id: diva2:939309
Note

Publication no: A3561

Available from: 2016-06-18 Created: 2016-06-07 Last updated: 2019-07-03Bibliographically approved

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Siljeström, Sandra

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