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Detecting sulfur on the Moon: The potential of VUV-LIBS

Kubitza, Simon and Schröder, Susanne and Dietz, Enrico and Frohmann, Sven and Hansen, Peder Bagge and Rammelkamp, Kristin and Vogt, David Sebastian and Gensch, Michael and Hübers, Heinz-Wilhelm (2020) Detecting sulfur on the Moon: The potential of VUV-LIBS. Spectrochimica Acta Part B: Atomic Spectroscopy, p. 105990. Elsevier. doi: 10.1016/j.sab.2020.105990. ISSN 0584-8547. (In Press)

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Official URL: http://www.sciencedirect.com/science/article/pii/S0584854720304298


Laser-induced breakdown spectroscopy (LIBS) receives increasing interest in the field of space exploration. Some volatile elements important to planetary research are, however, challenging to detect with conventional LIBS because their strongest emission lines lie in the vacuum-UV (VUV) spectral range below 200nm. We demonstrate the potential of LIBS detection in the VUV range from 125 to 190 nm on one of the relevant challenging elements, S, in a lunar context. With our laboratory set-up, we detected S in lunar analogues at concentrations ranging from 0.5 to 4.0 at\% in a time-integrated configuration. The experiments were conducted in high vacuum ($10^{-3}$ Pa) with laser parameters realistic for a space instrument (1064 nm, 25 mJ, 6 ns). The results indicate improved detection capabilities for S in a lunar geological context as compared to LIBS in the more common UV/VIS/NIR spectral range. We found limits of detection in the order of 0.5at S for all investigated sample series. Normalization by total intensity and by an internal standard, in our case by the emission signal of the O I triplet at 130 nm, was tested as well, but did not yield a noticeable improvement for our data. Besides S, we were also able to detect Al, Fe, O, Si and Ti from the lunar analogue matrix.

Item URL in elib:https://elib.dlr.de/136482/
Document Type:Article
Title:Detecting sulfur on the Moon: The potential of VUV-LIBS
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Schröder, SusanneUNSPECIFIEDhttps://orcid.org/0000-0003-1870-3663UNSPECIFIED
Rammelkamp, KristinUNSPECIFIEDhttps://orcid.org/0000-0003-4808-0823UNSPECIFIED
Vogt, David SebastianUNSPECIFIEDhttps://orcid.org/0000-0003-1109-6960UNSPECIFIED
Gensch, MichaelUNSPECIFIEDhttps://orcid.org/0000-0001-7755-1618UNSPECIFIED
Date:5 October 2020
Journal or Publication Title:Spectrochimica Acta Part B: Atomic Spectroscopy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:p. 105990
Status:In Press
Keywords:Laser-induced breakdown spectroscopy (LIBS), Sulfur detection, VUV-LIBS, Vacuum LIBS, Space exploration
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Vorhaben OptoRob (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems > Terahertz and Laser Spectroscopy
Deposited By: Kubitza, Simon
Deposited On:16 Oct 2020 10:16
Last Modified:23 Oct 2023 14:26

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