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Effects of pulsed laser and plasma interaction on Fe, Ni, Ti, and their oxides for LIBS Raman analysis in extraterrestrial environments

Schröder, Susanne and Rammelkamp, Kristin and Hanke, Franziska and Weber, Iris and Vogt, David Sebastian and Frohmann, Sven and Kubitza, Simon and Böttger, Ute and Hübers, Heinz‐Wilhelm (2019) Effects of pulsed laser and plasma interaction on Fe, Ni, Ti, and their oxides for LIBS Raman analysis in extraterrestrial environments. Journal of Raman Spectroscopy. Wiley. doi: 10.1002/jrs.5650. ISSN 0377-0486.

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Official URL: http://dx.doi.org/10.1002/jrs.5650


Laser‐induced breakdown spectroscopy (LIBS) and Raman spectroscopy have a high potential for in situ geochemical and mineralogical analyses for planetary exploration, in particular in combination. The SuperCam instrument onboard NASA's Mars 2020 rover will use both techniques together on another planet for the first time. The high‐power pulsed LIBS laser ablates material, and a small luminous plasma is produced for spectral analysis. The laser–matter interaction and the plasma shock wave can alter the sample surface, and new molecules can be produced, which deposit close to the LIBS ablation crater. Subsequent Raman analysis might then not sample the original structure. Here, we investigated pure metals (Fe, Ni, and Ti), the iron‐containing oxides hematite and ilmenite, and a fragment of the Gibeon meteorite in terrestrial ambient conditions, in simulated Martian atmospheric conditions, and in vacuum. LIBS ablation craters and their close proximity were studied with subsequent Raman analysis. Our analysis shows that Earth and Mars atmosphere provide enough oxygen in the LIBS plasma to produce oxides with metals from the sample. These can then be observed in the Raman data. Also, carbon was seen in some of the Raman data from the sample after the LIBS measurement. On hematite, a reduction of the mineral, that is, the presence of magnetite, was observed inside the LIBS crater for terrestrial and Martian atmospheric conditions and in vacuum. For the analysis and correct interpretation of Raman data it is important to be aware that alteration could have occurred by a preceding LIBS measurement. Raman analysis of several positions close to the LIBS ablation crater can help to infer the original and a possibly altered structure.

Item URL in elib:https://elib.dlr.de/128890/
Document Type:Article
Title:Effects of pulsed laser and plasma interaction on Fe, Ni, Ti, and their oxides for LIBS Raman analysis in extraterrestrial environments
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Schröder, SusanneUNSPECIFIEDhttps://orcid.org/0000-0003-1870-3663UNSPECIFIED
Rammelkamp, KristinUNSPECIFIEDhttps://orcid.org/0000-0003-4808-0823148027589
Vogt, David SebastianUNSPECIFIEDhttps://orcid.org/0000-0003-1109-6960UNSPECIFIED
Date:1 August 2019
Journal or Publication Title:Journal of Raman Spectroscopy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Keywords:LIBS, Mars, metals and their oxides, Raman spectroscopy, simulated planetary conditions/environments, space missions
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Exploration of the Solar System, R - Vorhaben OptoRob (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems > Terahertz and Laser Spectroscopy
Deposited By: Schröder, Susanne
Deposited On:27 Aug 2019 08:28
Last Modified:04 Dec 2023 14:32

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