Abstract We present a first estimate of the triboelectric charging generated by a drill in Shackleton crater; a permanently shadowed region at the Moon’s south pole. The results depend upon the local plasma environment as well as material properties of the drill and lunar regolith. We show how in the dark plasma-poor regions, a high voltage can accumulate due to the negligible electrical grounding, leading to a potential hazard for explorers and their equipment. To mitigate this problem, two grounding solutions are described: (i) A sun-facing surface outside of the shadowed region and (ii) a portable UV ionization lamp. The two solutions are physically analogous, depleting charge by photo-ionization, and are predicted to both be relatively manageable to implement. We estimate the parameter requirements and discuss pros and cons for each method.

中文翻译：

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月球阴影区域中钻头的摩擦充电和电气接地

摘要 我们对沙克尔顿陨石坑中的钻头产生的摩擦带电进行了初步估计；月球南极的永久阴影区域。结果取决于当地的等离子体环境以及钻头和月球风化层的材料特性。我们展示了在黑暗的等离子体贫乏的地区，由于可忽略不计的电气接地，高电压会如何积累，从而对探险者及其设备造成潜在危险。为了缓解这个问题，描述了两种接地解决方案：（i）阴影区域外的面向太阳的表面和（ii）便携式紫外线电离灯。这两种解决方案在物理上是相似的，通过光电离消耗电荷，并且预计都相对易于实施。我们估计参数要求并讨论每种方法的优缺点。