Analytical techniques for retrieval of atmospheric composition with the quadrupole mass spectrometer of the Sample Analysis at Mars instrument suite on Mars Science Laboratory
Analytical techniques for retrieval of atmospheric composition with the quadrupole mass spectrometer of the Sample Analysis at Mars instrument suite on Mars Science Laboratory
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DOI：
10.1016/j.pss.2014.03.005
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发表时间：
2014-06-01
影响因子：
2.4
通讯作者：
Raaen, Eric
中科院分区：
文献类型：
--
作者：
Franz, Heather B.;Trainer, Melissa G.;Raaen, Eric
火星样本分析（SAM）仪器套件是火星科学实验室（MSL）好奇号火星车上最大的科学有效载荷，该火星车于2012年8月降落在火星的盖尔陨石坑。作为一个微型地球化学实验室，SAM设备齐全，可以解决MSL主要科学目标的多个方面，表征盖尔陨石坑过去或现在的潜在宜居性。大气测量通过与火星气候演变相关的成分调查来支持这一目标。SAM仪器包括一台四极杆质谱仪、一台可调谐激光光谱仪和一台气相色谱仪，用于分析火星大气气体以及固体表面物质热解释放的挥发物（Mahaffy et al., 2012）。本报告介绍了从SAM的四极质谱计获得的测量数据中检索火星大气化学和同位素组成的分析方法。它为计算最丰富的大气物种的体积混合比提供了经验校准常数，并提供了校正仪器伪像和表征测量不确定度的分析函数。最后，我们从分析的角度讨论了由SAM （Mahaffy et al., 2013）和Viking （Owen et al., 1977; Oyama and Berdahl, 1977）测定的火星大气体积混合比的差异。虽然本文的重点是大气观测，但有关仪器效应校正的许多材料也适用于从固体样品分析中获得的SAM数据的减少。(C) 2014 Elsevier Ltd.版权所有。
The Sample Analysis at Mars (SAM) instrument suite is the largest scientific payload on the Mars Science Laboratory (MSL) Curiosity rover, which landed in Mars' Gale Crater in August 2012. As a miniature geochemical laboratory, SAM is well-equipped to address multiple aspects of MSL's primary science goal, characterizing the potential past or present habitability of Gale Crater. Atmospheric measurements support this goal through compositional investigations relevant to martian climate evolution. SAM instruments include a quadrupole mass spectrometer, a tunable laser spectrometer, and a gas chromatograph that are used to analyze martian atmospheric gases as well as volatiles released by pyrolysis of solid surface materials (Mahaffy et al., 2012). This report presents analytical methods for retrieving the chemical and isotopic composition of Mars' atmosphere from measurements obtained with SAM's quadrupole mass spectrometer. It provides empirical calibration constants for computing volume mixing ratios of the most abundant atmospheric species and analytical functions to correct for instrument artifacts and to characterize measurement uncertainties. Finally, we discuss differences in volume mixing ratios of the martian atmosphere as determined by SAM (Mahaffy et al., 2013) and Viking (Owen et al., 1977; Oyama and Berdahl, 1977) from an analytical perspective. Although the focus of this paper is atmospheric observations, much of the material concerning corrections for instrumental effects also applies to reduction of data acquired with SAM from analysis of solid samples. (C) 2014 Elsevier Ltd. All rights reserved.