Sampling of Regolith on Asteroids Utilizing Electrostatic Force

M. Adachi, H. Maezono, Hiroyuki Kawamoto

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    To achieve reliable and autonomous regolith sampling on asteroids, we have developed a unique sampling system that utilizes electrostatic force. When a rectangular high voltage is applied between parallel screen electrodes, the resultant Coulomb force and dielectrophoresis force act on particles in the vicinity of the electrodes, and some particles are captured passing through the openings of the screen electrodes. The sampling system is simple, has low power consumption, and has no mechanical moving parts. It was demonstrated that a lunar regolith simulant can be captured in a zero-G environment reproduced by the parabolic flight of an aircraft. As predicted by a numerical calculation utilizing a hard sphere model of the three-dimensional Distinct Element Method, a large amount of lunar regolith simulant, approximately 900 mg, was successfully sampled. The captured regolith particles contained not only small particles but also large particles more than 0.5 mm in diameter. Moreover, it was predicted by the numerical calculation that the sampling system would perform much better in a vacuum than in air.

    Original languageEnglish
    Title of host publicationEarth and Space 2014: Engineering for Extreme Environments - Proceedings of the 14th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments
    PublisherAmerican Society of Civil Engineers (ASCE)
    Pages266-273
    Number of pages8
    ISBN (Print)9780784479179
    DOIs
    Publication statusPublished - 2014
    Event14th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments: Engineering for Extreme Environments, Earth and Space 2014 - St. Louis, United States
    Duration: 2014 Oct 272014 Oct 29

    Other

    Other14th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments: Engineering for Extreme Environments, Earth and Space 2014
    CountryUnited States
    CitySt. Louis
    Period14/10/2714/10/29

    ASJC Scopus subject areas

    • Environmental Engineering
    • Building and Construction

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  • Cite this

    Adachi, M., Maezono, H., & Kawamoto, H. (2014). Sampling of Regolith on Asteroids Utilizing Electrostatic Force. In Earth and Space 2014: Engineering for Extreme Environments - Proceedings of the 14th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments (pp. 266-273). American Society of Civil Engineers (ASCE). https://doi.org/10.1061/9780784479179.030