elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Datenschutz | Kontakt | English
Schriftgröße: [-] Text [+]

CaCl and CaF emission in LIBS under simulated martian conditions

Vogt, David und Schröder, Susanne und Rammelkamp, Kristin und Hansen, Peder Bagge und Kubitza, Simon und Hübers, Heinz-Wilhelm (2019) CaCl and CaF emission in LIBS under simulated martian conditions. Icarus, 335, Seite 113393. Elsevier. doi: 10.1016/j.icarus.2019.113393. ISSN 0019-1035.

[img] PDF - Postprintversion (akzeptierte Manuskriptversion)
2MB

Offizielle URL: https://www.sciencedirect.com/science/article/pii/S0019103519301563

Kurzfassung

Chlorine and fluorine play an important role in the geological history of Mars due to their high concentration in Martian magmas and their influence on the generation and evolution of Martian basalts. Chlorine-bearing salts could also facilitate the formation of eutectic brines that could be important for the fluvial history of Mars. The LIBS instruments of ChemCam and SuperCam can detect emission lines of Cl and F, but the intensity of these emission lines is comparatively low, making it difficult to quantify them correctly. A promising alternative is the quantification by molecular emission of diatomic molecules like CaCl and CaF, which can be observed as intense molecular bands in LIBS spectra if Ca is also present. However, the nonlinear dependence of the band intensity on the concentrations of both elements needs to be considered. In this study, we expand upon our previous analysis of molecular bands by investigating samples which produce CaCl bands, CaF bands, or both. We find that the highest CaCl band intensities are found in samples containing more Ca than Cl, while the strongest CaF bands are found in samples with roughly equal concentrations of Ca and F. Both observations can be described by the model that we present here. We also find that the CaCl band is significantly stronger for a sample containing CaCl2 than it is for a sample containing the same concentrations of Ca and Cl in separate bonds. The opposite is true for the CaF band, which is significantly weaker for the sample containing CaF2 bonds than it is for the sample that does not contain CaF2 bonds. These matrix effects are partially attributed to fragmentation during the ablation process and differences in the dissociation energies. Furthermore, we observe that CaF formation is not affected by competing CaCl formation, while CaCl is strongly affected by competing CaF formation. All measurements are done in simulated Martian atmospheric conditions in order to assist the analysis of Martian LIBS data.

elib-URL des Eintrags:https://elib.dlr.de/131151/
Dokumentart:Zeitschriftenbeitrag
Titel:CaCl and CaF emission in LIBS under simulated martian conditions
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Vogt, DavidDavid.Vogt (at) dlr.dehttps://orcid.org/0000-0003-1109-6960NICHT SPEZIFIZIERT
Schröder, SusanneSusanne.Schroeder (at) dlr.dehttps://orcid.org/0000-0003-1870-3663NICHT SPEZIFIZIERT
Rammelkamp, KristinKristin.Rammelkamp (at) dlr.dehttps://orcid.org/0000-0003-4808-0823NICHT SPEZIFIZIERT
Hansen, Peder BaggePederBagge.Hansen (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Kubitza, SimonSimon.Kubitza (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Hübers, Heinz-WilhelmHeinz-Wilhelm.Huebers (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:6 August 2019
Erschienen in:Icarus
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:335
DOI:10.1016/j.icarus.2019.113393
Seitenbereich:Seite 113393
Verlag:Elsevier
ISSN:0019-1035
Status:veröffentlicht
Stichwörter:Mars Spektroskopie Experimente Molekülemissionen Plasma
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Technik für Raumfahrtsysteme
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R SY - Technik für Raumfahrtsysteme
DLR - Teilgebiet (Projekt, Vorhaben):R - Robotischer Wissenschafts-Explorer, R - Vorhaben Optische Sensorik - Theorie, Kalibration, Verifikation (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Optische Sensorsysteme > Terahertz- und Laserspektroskopie
Hinterlegt von: Vogt, Dr. David
Hinterlegt am:25 Nov 2019 08:57
Letzte Änderung:31 Okt 2023 14:02

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Gestaltung Webseite und Datenbank: Copyright © Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.