Onboard calibration igneous targets for the Mars Science Laboratory Curiosity rover and the Chemistry Camera laser induced breakdown spectroscopy instrument

摘要: article i nfo Accurate characterization of the Chemistry Camera (ChemCam) laser-induced breakdown spectroscopy (LIBS) on-board composition targets is prime importance for ChemCam instrument. The Mars Science Laboratory (MSL) science and operations teams expect to provide first compositional results at remote distances (1.5-7 m) during in situ analyses Martian surface starting 2012. Thus, establishing LIBS reference spectra from appropriate calibration standards must be undertaken diligently. Considering global mineralogy surface, possible landing sites, three specific compositions igneous have been determined. Picritic, noritic, shergottic glasses produced, along with a Macusanite natural glass. A sample each target will fly on MSL Curiosity rover deck, 1.56 m instrument, duplicates are available ground. Duplicates considered identical, as relative standard deviation (RSD) dispersion around 8%. Electronic microprobe laser ablation inductively coupled plasma mass spectrometry (LA ICP-MS) give evidence that chemical four silicate very homogeneous microscopic scales larger than instrument spot size, RSD b5% concentration variations N0.1 wt.% using electronic microprobe, b10% N0.01 LA ICP-MS. campaign performed under flight-like conditions establishes entire mission. between 240 900 nm extremely rich, hundreds lines high signal-to-noise, dynamical range sufficient identify unambiguously major, minor trace elements. For instance, curve has established strontium (Sr)=284 ppm (Sr)=1480 ppm, showing potential future calibrations other major or