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Correcting for variable laser-target distances of laser-induced breakdown spectroscopy measurements with ChemCam using emission lines of Martian dust spectra

Melikechi, N. and Mezzacappa, A. and Cousin, A. and Lanza, N.L. and Lasue, J. and Clegg, S.M. and Berger, G. and Wiens, R.C. and Maurice, S. and Tokar, R.L. and Bender, S. and Forni, O. and Breves, E.A. and Dyar, M.D. and Frydenvang, J. and Delapp, D. and Gasnault, O. and Newsom, H. and Ollila, A.M. and Lewin, E. and Clark, B.C. and Ehlmann, B.L. and Blaney, D. and Fabre, C. and the MSL Science Team and DLR Collaborator (MSL Science Team), Reitz G. (2014) Correcting for variable laser-target distances of laser-induced breakdown spectroscopy measurements with ChemCam using emission lines of Martian dust spectra. Spectrochimica Acta Part B: Atomic Spectroscopy, 96, pp. 51-60. Elsevier. doi: 10.1016/j.sab.2014.04.004. ISSN 0584-8547.

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Official URL: http://dx.doi.org/10.1016/j.sab.2014.04.004

Abstract

As part of the Mars Science Laboratory, the ChemCam instrument acquires remote laser induced breakdown spectra at distances that vary between 1.56 m and 7 m. This variation in distance affects the intensities of the measured LIBS emission lines in non-trivial ways. To determine the behavior of a LIBS emission line with distance, it is necessary to separate the effects of many parameters such as laser energy, laser spot size, target homogeneity, and optical collection efficiency. These parameters may be controlled in a laboratory on Earth but for field applications or in space this is a challenge. In this paper, we show that carefully selected ChemCam LIBS emission lines acquired from the Martian dust can be used to build an internal proxy spectroscopic standard. This in turn, allows for a direct measurement of the effects of the distance of various LIBS emission lines and hence can be used to correct ChemCam LIBS spectra for distance variations. When tested on pre-launch LIBS calibration data acquired under Martian-like conditions and with controlled and well-calibrated targets, this approach yields much improved agreement between targets observed at various distances. This work lays the foundation for future implementation of automated routines to correct ChemCam spectra for differences caused by variable distance.

Item URL in elib:https://elib.dlr.de/99590/
Document Type:Article
Title:Correcting for variable laser-target distances of laser-induced breakdown spectroscopy measurements with ChemCam using emission lines of Martian dust spectra
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Melikechi, N.Optical Science Center for Applied Research, Delaware State University, Dover, DE, USAUNSPECIFIED
Mezzacappa, A.UNSPECIFIEDUNSPECIFIED
Cousin, A.UNSPECIFIEDUNSPECIFIED
Lanza, N.L.UNSPECIFIEDUNSPECIFIED
Lasue, J.UNSPECIFIEDUNSPECIFIED
Clegg, S.M.UNSPECIFIEDUNSPECIFIED
Berger, G.UNSPECIFIEDUNSPECIFIED
Wiens, R.C.UNSPECIFIEDUNSPECIFIED
Maurice, S.UNSPECIFIEDUNSPECIFIED
Tokar, R.L.UNSPECIFIEDUNSPECIFIED
Bender, S.UNSPECIFIEDUNSPECIFIED
Forni, O.UNSPECIFIEDUNSPECIFIED
Breves, E.A.UNSPECIFIEDUNSPECIFIED
Dyar, M.D.UNSPECIFIEDUNSPECIFIED
Frydenvang, J.UNSPECIFIEDUNSPECIFIED
Delapp, D.UNSPECIFIEDUNSPECIFIED
Gasnault, O.UNSPECIFIEDUNSPECIFIED
Newsom, H.UNSPECIFIEDUNSPECIFIED
Ollila, A.M.UNSPECIFIEDUNSPECIFIED
Lewin, E.UNSPECIFIEDUNSPECIFIED
Clark, B.C.UNSPECIFIEDUNSPECIFIED
Ehlmann, B.L.UNSPECIFIEDUNSPECIFIED
Blaney, D.UNSPECIFIEDUNSPECIFIED
Fabre, C. and the MSL Science TeamUNSPECIFIEDUNSPECIFIED
DLR Collaborator (MSL Science Team), Reitz G.Radiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany.UNSPECIFIED
Date:2014
Journal or Publication Title:Spectrochimica Acta Part B: Atomic Spectroscopy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:96
DOI:10.1016/j.sab.2014.04.004
Page Range:pp. 51-60
Publisher:Elsevier
ISSN:0584-8547
Status:Published
Keywords:LIBS; Mars; Dust; Remote sensing; Geological analysis
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 - Vorhaben MSL-Radiation (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:26 Nov 2015 15:46
Last Modified:06 Sep 2019 15:30

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