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Improving Sulfur Detection in Martian Targets with time-resolved LIBS

Schröder, Susanne and Rammelkamp, Kristin and Vogt, David and Cousin, A. and Forni, O. and Maurice, S. and Clegg, S. M. and Wiens, R. C. and Hübers, Heinz-Wilhelm (2017) Improving Sulfur Detection in Martian Targets with time-resolved LIBS. EMSLIBS 2017, 2017-06-11 - 2017-06-16, Pisa, Italien.

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The first extraterrestrially employed LIBS instrument is ChemCam on NASA’s Mars rover Curiosity, which has been successfully analyzing materials on the martian surface since the rover’s landing in August 2012 [1,2]. The success of ChemCam has led to the selection of the SuperCam instrument [3] for NASA’s upcoming Mars2020 rover mission. As for ChemCam, SuperCam will have a LIBS telescopic system combined with a high-resolution color remote micro-imager cam-era [4] for remote analysis, along with the added capabilities of complementary Raman spectroscopy, time-resolved fluorescence spectroscopy, and visible and infrared reflectance spectroscopy [5,6]. Time-resolved Raman spectroscopy will be done with the same spectrometer and detector that are used for the third wavelength range for LIBS, providing the possibility of also recording time-resolved LIBS data in a wavelength range of 536 – 853 nm. The detection of S in ChemCam data, which falls in this range, is challenging, in particular when samples with high Fe are analyzed. As the S emission is ionic and the superimposed Fe lines are mainly neutral, their emission occurs in different temporal regimes, which can be utilized for their differentiation with time-resolved LIBS. Here, we present studies on Fe-Sulfate, Pyrite, and Pyrrhotite measured in martian atmospheric conditions where we explore the S and Fe typical emission behaviors and develop strategies for improved S detection in martian targets. All data was taken at the LIBS set-up at DLR Berlin in simulated martian atmospheric conditions (7 mbar) with a high resolution (14-96 pm) Echelle spectrometer (Aryelle Butterfly, LTB Berlin) covering continuously 270-850 nm with an intensified CCD and a Nd:YAG laser (1064 nm, 8 ns, 10 Hz).

Item URL in elib:https://elib.dlr.de/113432/
Document Type:Conference or Workshop Item (Speech)
Title:Improving Sulfur Detection in Martian Targets with time-resolved 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, DavidUNSPECIFIEDhttps://orcid.org/0000-0003-1109-6960UNSPECIFIED
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:LIBS, Sulfur, Mars
Event Title:EMSLIBS 2017
Event Location:Pisa, Italien
Event Type:international Conference
Event Start Date:11 June 2017
Event End Date:16 June 2017
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Vorhaben Optische Sensorik - Theorie, Kalibration, Verifikation (old), R - Robotic Science Explorer
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems > Terahertz and Laser Spectroscopy
Deposited By: Schröder, Susanne
Deposited On:28 Jul 2017 08:37
Last Modified:24 Jun 2024 13:15

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