Calibration of the MSL/ChemCam/LIBS Remote Sensing Composition Instrument

摘要: The ChemCam instrument suite on board the 2011 Mars Science Laboratory (MSL) Rover, Curiosity, will provide remote-sensing composition information for rock and soil samples within seven meters of rover using a laser-induced breakdown spectroscopy (LIBS) system, context imaging with resolution 0.10 mradians remote micro-imager (RMI) camera. high is needed to image small analysis footprint LIBS at 0.2-0.6 mm diameter. This fine scale analytical capability enable probing stratigraphic layers or other features size "blueberries" smaller. intended rapid survey analyses 7 m rover, each measurement taking less than 6 minutes. Repeated laser pulses remove dust coatings depth profiles through weathering layers, allowing detailed investigation varnish as well underlying pristine composition. technique uses brief greater 10 MW/square ablate electrically excite material from sample interest. plasma emits photons wavelengths characteristic elements present in material, permitting detection quantification nearly all elements, including light H, Li, Be, B, C, N, O. projects 14 mJ 1067 nm target covers spectral range 240-850 resolutions between 0.15 0.60 FWHM. Nd:KGW passively cooled tuned maximum power output -10 0 though it can operate 20% degraded energy room temperature. Preliminary calibrations were carried out flight model (FM) 2008. However, detectors replaced 2009, final occurred April-June, 2010. presentation describes calibration characterization procedures results, details plans during system thermal testing, planned early March.