Spatiotemporal characterization of the laser-induced plasma plume in simulated Martian conditions

Vogt, David; Schröder, Susanne; Frohmann, Sven; Hansen, Peder Bagge; Fabian, Seel,; Gensch, Michael; Hübers, Heinz‐Wilhelm

doi:10.1016/j.sab.2021.106326

Cited by 10 publications

(4 citation statements)

References 54 publications

(73 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We note here that plasma temperature cannot serve as a proper metric for an accurate comparison between observations at different pressures due to its dynamic change on a μs time scale. 62 The chosen acquisition parameters were aimed for accurate comparison of emitted intensities rather than for comparison of plasma temperatures at different ambient pressures. The 5 μs acquisition window was chosen to integrate over the entire lifetime of the plasma, whereas specifically chosen shorter acquisition windows would be desired for accurate comparison of peak plasma temperatures.…”

Section: Discussionmentioning

confidence: 99%

“…Significantly higher temperatures were derived in the analysis of the spectra in the laboratory Martian simulation conditions (12,000–17,000 K) and in situ measurements (12,000–35,000 K) with the ChemCam instrument, which utilizes higher energy Gaussian-like beams. We note here that plasma temperature cannot serve as a proper metric for an accurate comparison between observations at different pressures due to its dynamic change on a μs time scale . The chosen acquisition parameters were aimed for accurate comparison of emitted intensities rather than for comparison of plasma temperatures at different ambient pressures.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of LIBS-Induced Alteration on Subsequent Raman Analysis of Iron Sulfides

Alsemgeest

Pavlov

Böttger

et al. 2022

ACS Earth Space Chem.

View full text Add to dashboard Cite

Mineral alteration is a possible side effect of spectroscopic techniques involving laser ablation, such as laser-induced breakdown spectroscopy (LIBS), and is related to the interaction of the generated plasma and ablated material with samples, dust, or ambient atmosphere. Therefore, it is essential to understand these interactions for analytical techniques involving laser ablation, especially for space research. In this combined LIBS–Raman analytical study, pyrite (FeS 2 ) and pyrrhotite (Fe 1– x S) samples have been consecutively measured with LIBS and Raman spectroscopy, under three different atmospheric conditions: ∼10 –4 mbar (atmosphereless body), ∼7 mbar, and Martian atmospheric composition (Martian surface conditions), and 1 bar and Martian atmospheric composition. Furthermore, a dust layer was simulated using ZnO powder in a separate test and applied to pyrite under Martian atmospheric conditions. In all cases, Raman spectra were obscured after the use of LIBS in the area of and around the formed crater. Additional Raman transitions were detected, associated with sulfur (pyrite, 7.0 mbar and 1.0 bar), polysulfides (all conditions), and magnetite (both minerals, 1.0 bar). Magnetite and polysulfides formed a thin film of up to 350–420 and 70–400 nm in the outer part of the LIBS crater, respectively. The ZnO-dust test led to the removal of the dust layer, with a similar alteration to the nondust pyrite test at 7.0 mbar. The tests indicate that recombination with the CO 2 -rich atmosphere is significant at least for pressures from 1.0 bar and that plasma–dust interaction is insignificant. The formation of sulfur and polysulfides indicates fractionation and possible loss of volatile elements caused by the heat of the LIBS laser. This should be taken into account when interpreting combined LIBS–Raman analyses of minerals containing volatile elements on planetary surfaces.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effect of LIBS-Induced Alteration on Subsequent Raman Analysis of Iron Sulfides

Alsemgeest

Pavlov

Böttger

et al. 2022

ACS Earth Space Chem.

View full text Add to dashboard Cite

show abstract

“…Additionally, statistical analysis suggested that molecular emission signals were the major contributors to achieve high LIBS sorting performance and feasibility of discriminating closely related organic compounds in the Martian atmosphere. Vogt et al 125 performed a spatiotemporal characterisation of a LIP plume in simulated Martian conditions. From the investigation of a calcium sulphate sample, they found unique spatial distributions, which suggested a strong influence of the outgoing shock wave at selected atmospheric conditions.…”

Section: Laser-based Atomic Spectrometrymentioning

confidence: 99%

Atomic spectrometry update: review of advances in atomic spectrometry and related techniques

Evans

Pisonero

Smith

et al. 2023

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

show abstract

“…This last method has been extensively studied. 5,6,[8][9][10][30][31][32][33][34][35][36][37][38][39] The use of molecular signals yields a simple experimental conguration while achieving low limits of detection (LOD) and quantication (LOQ). Moreover, this approach is very appropriate for the determination of Cl in cements, given that Ca is a major compound of the material and therefore CaCl bands are present in LIP spectra.…”

Section: Introductionmentioning

confidence: 99%