Theoretical modeling and analysis of the emission spectra of a ChemCam standard: Basalt BIR-1A
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
We report here on efforts to perform theoretical modeling of the emission spectrum measured from a basalt sample. We compare our calculations with measurements that were made to provide standards for the ChemCam instrument on the Mars Science Laboratory. We find that to obtain good agreement between modeling and the measurement, it is necessary to determine atomic and ionic level populations via a multi-element approach in which the free electron density that is created influences all the species within the plasma. Calculations that consider each element separately are found to be in poorer agreement with the measured spectrum, indicating that the ‘matrix effect’ term often used to describe the influence of other species on the emission spectrum from a given element is due to the influence of the global electron density of the plasma. We explore the emission features in both the visible and near-infrared wavelength ranges, and also examine radiation transport effects for some of the most intense features found in the basalt spectrum. We also provide comparisons of the ChemCam measurement with new high-resolution spectral measurements.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); LANL Laboratory Directed Research and Development (LDRD) Program
- Grant/Contract Number:
- AC52-06NA25396; AC5206NA25396
- OSTI ID:
- 1489944
- Alternate ID(s):
- OSTI ID: 1422665
- Report Number(s):
- LA-UR-15-21167
- Journal Information:
- Spectrochimica Acta. Part B, Atomic Spectroscopy, Vol. 110; ISSN 0584-8547
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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