Laser induced breakdown spectroscopy library for the Martian environment
Laser induced breakdown spectroscopy library for the Martian environment
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DOI：
10.1016/j.sab.2011.10.004
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发表时间：
2011-11-01
影响因子：
3.3
通讯作者：
Mazoyer, J.
中科院分区：
文献类型：
--
作者：
Cousin, A.;Forni, A.;Mazoyer, J.
NASA火星科学实验室探测器将携带第一个太空激光诱导击穿光谱实验：ChemCam。我们已经开发了一个模拟ChemCam主要特征的实验室模型。我们使用了一组与火星地球化学相关的目标样本，并记录了各个光谱。我们提出了一个数据减少计划的激光诱导击穿光谱数据，将去噪，连续去除，和峰值拟合。我们的实验证实了火星大气的已知影响：与地球相比，火星上的信噪比更好，峰宽更窄，基本上没有自吸收。讨论了大气压力到火星压力的发射谱线的波长漂移。美国国家标准与技术研究所的真空数据库用于波长校准和识别元素线。我们的火星数据库包含32种元素的1336条谱线：H、Li、Be、B、C、N、O、F、Na、Mg、Al、Si、P、S、Cl、K、Ar、Ca、Ti、V、Cr、Mn、Fe、Ni、Cu、Zn、As、Rb、Sr、Cs、Ba和Pb。它是国家标准与技术研究所数据库的一个子集，将用于火星地球化学。最后，可以从火星数据库中建立合成光谱。相关性计算有助于在不确定的情况下区分元素。这项工作用于创建工具和支持数据，用于解释ChemCam结果。(C)2011 Elsevier B.V.保留所有权利。
The NASA Mars Science Laboratory rover will carry the first Laser Induced Breakdown Spectroscopy experiment in space: ChemCam. We have developed a laboratory model which mimics ChemCam's main characteristics. We used a set of target samples relevant to Mars geochemistry, and we recorded individual spectra. We propose a data reduction scheme for Laser Induced Breakdown Spectroscopy data incorporating de-noising, continuum removal, and peak fitting. Known effects of the Martian atmosphere are confirmed with our experiment: better Signal-to-Noise Ratio on Mars compared to Earth, narrower peak width, and essentially no self-absorption. The wavelength shift of emission lines from air to Mars pressure is discussed. The National Institute of Standards and Technology vacuum database is used for wavelength calibration and to identify the elemental lines. Our Martian database contains 1336 lines for 32 elements: H, Li, Be, B, C, N, O, F, Na, Mg, Al, Si, P. S, Cl, K, Ar, Ca, Ti, V. Cr, Mn, Fe, Ni, Cu, Zn, As, Rb, Sr, Cs, Ba, and Pb. It is a subset of the National Institute of Standards and Technology database to be used for Martian geochemistry. Finally, synthetic spectra can be built from the Martian database. Correlation calculations help to distinguish between elements in case of uncertainty. This work is used to create tools and support data for the interpretation of ChemCam results. (C) 2011 Elsevier B.V. All rights reserved.