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In situ dielectric spectroscopy for water detection on the lunar surface

机译：原位介电光谱法在月球表面进行水探测

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Published literature suggests that water ice might be unambiguously detected in the presence of background contaminants by developing a frequency swept sensor to obtain the dielectric spectrum. Such a sensor could be incorporated into the tip of a spike and driven into the lunar regolith to detect moisture as a function of depth. A sensor was created to test this concept for varying concentrations of ice in lunar soil simulant under vacuum conditions. Ice relaxation occurs at frequencies well below 1 Hz at temperatures present on the Lunar surface, making it difficult to distinguish ice from the surrounding regolith. So, a heating element was incorporated with the sensor to capture the dielectric spectra as the ice warms, allowing the relaxation to be detected in a shorter period of time. The test results show the ability of this sensor to detect the presence of varying quantities of ice in the soil simulant and the need for more complex non-linear mixing models to quantify the amount of ice present in the mixture.
机译：已发表的文献表明，通过开发扫频传感器以获得介电谱，可以在存在背景污染物的情况下明确检测出水冰。可以将这样的传感器并入尖峰的尖端并驱动进入月球石块，以检测水分随深度的变化。创建了一个传感器来测试这一概念，以便在真空条件下改变月球土壤模拟物中冰的浓度。在月球表面上存在的温度下，冰松弛发生在频率远低于1 Hz的频率上，因此很难将冰与周围的块石区分开。因此，加热元件与传感器结合在一起，可以在冰变暖时捕获介电谱，从而可以在较短的时间内检测到松弛。测试结果表明该传感器能够检测土壤模拟物中不同数量的冰的存在，并且需要更复杂的非线性混合模型来量化混合物中冰的数量。

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