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Performance of a Borehole X-ray Fluorescence Spectrometer for Planetary Exploration

机译:钻孔X射线荧光光谱仪在行星探测中的性能

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摘要

We have designed and constructed a borehole X-ray Fluorescence Spectrometer (XRFS) as part of the Mars Subsurface Access program [1]. It can be used to determine the composition of the Mars regolith at various depths by insertion into a pre-drilled borehole. The primary requirements and performance metrics for the instrument are to obtain parts-per-million (ppm) lower limits of detection over a wide range of elements in the periodic table (Magnesium to Lead). Power consumption during data collection was also measured. The prototype instrument is complete and preliminary testing has been performed. Terrestrial soil Standard Reference Materials were used as the test samples. Detection limits were about 10 weight ppm for most elements, with light elements being higher, up to 1.4 weight percent for magnesium. Power consumption (excluding ground support components) was 12 watts.
机译:我们设计并建造了一个钻孔X射线荧光光谱仪(XRFS),作为“火星地下访问”程序的一部分[1]。通过插入预先钻好的钻孔中,它可以用于确定各种深度的火星长石的成分。该仪器的主要要求和性能指标是在元素周期表(镁到铅)中的各种元素上获得百万分之几(ppm)的下限。还测量了数据收集期间的功耗。原型仪器已完成,并且已经执行了初步测试。将陆地土壤标准参考物质用作测试样品。大多数元素的检出限约为10重量ppm,轻元素则更高,镁的最高检出限为1.4重量%。功耗(不包括地面支撑组件)为12瓦。

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