Gas containment for in situ sample analysis on the Moon: Utility of sealing materials in the presence of dust

Abernethy, F. A. J.; Sheridan, S.; Barber, S. J.

doi:10.1016/j.pss.2019.104784

Cited by 2 publications

References 18 publications

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PTFE as a viable sealing material for lightweight mass spectrometry ovens in dusty extraterrestrial environments

Abernethy,

Chinnery,

Lindner

et al. 2024

RAS Techniques and Instruments

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Ever increasing interest in the Moon, not only for scientific but also commercial and prospecting purposes, requires a more streamlined and reproduceable approach to issues such as the sealing of sample handling ovens, in contrast to the mission-specific mechanisms which have tended to prevail in the past. A test breadboard has been designed and built in order to evaluate the leak rates of different oven sealing concepts and materials within the context of the ProSPA instrument being developed for the European Space Agency. Sealing surface geometries based on a simple 90° knife-edge, and two widely used vacuum fitting standards (VCR® and ConFlat®) have been tested using PTFE gaskets in vacuum across a temperature range of -100°C to 320°C, equivalent to a projected -100°C to 1000°C sample heating range in the ProSPA ovens. The impact of using glass- and carbon- filled PTFE has also been investigated, as has the effect of dust coverage of JSC-1A lunar simulant up to 9 per cent by area. The best combination of properties appears to be unfilled PTFE, compressed between two 90° knife-edges with a confining force of ∼ 400 N. This can produce a leak rates within the 10−7 Pa.m3.s−1 range or better regardless of the level of dust applied within the experimental constraints. A strong temperature-dependence on the leak rate is identified, meaning that careful oven design will be required to minimise the temperature at the seal interface even within the operational temperature range PTFE itself.

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PTFE as a viable sealing material for lightweight mass spectrometry ovens in dusty extraterrestrial environments

Abernethy,

Chinnery,

Lindner

et al. 2024

RAS Techniques and Instruments

View full text Add to dashboard Cite

show abstract

Design and Experimental Validation of Sealing Assembly for Lunar Regolith Volatile Extraction Heating Furnace

Zhang,

Tang,

Wang

et al. 2023

2023 IEEE International Conference on Robotics and Biomimetics (ROBIO)

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Gas containment for in situ sample analysis on the Moon: Utility of sealing materials in the presence of dust

Abstract: Gas containment for in situ sample analysis on the Moon: Utility of sealing materials in the presence of dust. Planetary and Space Science, 180, article no. 104784. For guidance on citations see FAQs.

Cited by 2 publications

References 18 publications

PTFE as a viable sealing material for lightweight mass spectrometry ovens in dusty extraterrestrial environments

PTFE as a viable sealing material for lightweight mass spectrometry ovens in dusty extraterrestrial environments

Design and Experimental Validation of Sealing Assembly for Lunar Regolith Volatile Extraction Heating Furnace

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