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Investigation of LIBS and Raman data analysis methods in the context of in-situ planetary exploration

Rammelkamp, Kristin (2019) Investigation of LIBS and Raman data analysis methods in the context of in-situ planetary exploration. Dissertation, Humboldt Universität zu Berlin. doi: 10.18452/20703.

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Offizielle URL: https://edoc.hu-berlin.de/handle/18452/21613

Kurzfassung

The studies presented in this thesis investigate different data analysis approaches for mainly laser-induced breakdown spectroscopy (LIBS) and also Raman data in the context of planetary in-situ exploration. Most studies were motivated by Mars exploration due to the first extraterrestrially employed LIBS instrument ChemCam on NASA's Mars Science Laboratory (MSL) and further planned LIBS and Raman instruments on upcoming missions to Mars. Next to analytical approaches, statistical methods known as multivariate data analysis (MVA) were applied and evaluated. In this thesis, four studies are presented in which LIBS and Raman data analysis strategies are evaluated. In the first study, LIBS data normalization with plasma parameters, namely the plasma temperature and the electron density, was studied. In the second study, LIBS measurements in vacuum conditions were investigated with a focus on the degree of ionization of the LIBS plasma. In the third study, the capability of MVA methods such as principal component analysis (PCA) and partial least squares regression (PLS-R) for the identification and quantification of halogens by means of molecular emissions was tested. The outcomes are promising, as it was possible to distinguish apatites and to quantify chlorine in a particular concentration range. In the fourth and last study, LIBS data was combined with complementary Raman data in a low-level data fusion approach using MVA methods. Also, concepts of high-level data fusion were implemented. Low-level LIBS and Raman data fusion can improve identification capabilities in comparison to the single datasets. However, the improvement is comparatively small regarding the higher amount of information in the low-level fused data and dedicated strategies for the joint analysis of LIBS and Raman data have to be found for particular scientific objectives.

elib-URL des Eintrags:https://elib.dlr.de/147852/
Dokumentart:Hochschulschrift (Dissertation)
Titel:Investigation of LIBS and Raman data analysis methods in the context of in-situ planetary exploration
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Rammelkamp, KristinKristin.Rammelkamp (at) dlr.dehttps://orcid.org/0000-0003-4808-0823NICHT SPEZIFIZIERT
Datum:Dezember 2019
Referierte Publikation:Ja
Open Access:Nein
DOI:10.18452/20703
Seitenanzahl:175
Status:veröffentlicht
Stichwörter:LIBS, Raman spectroscopy, multivariate data analysis, data fusion, Mars
Institution:Humboldt Universität zu Berlin
Abteilung:Mathematisch-Naturwissenschaftliche Fakultät
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 - Detektoren für optische Instrumente
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Optische Sensorsysteme
Hinterlegt von: Rammelkamp, Kristin
Hinterlegt am:22 Dez 2021 09:05
Letzte Änderung:22 Dez 2021 09:05

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