Sampling of Regolith on Asteroids Utilizing Electrostatic Force

M. Adachi, H. Maezono, Hiroyuki Kawamoto

    研究成果: Conference contribution

    抄録

    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.

    本文言語English
    ホスト出版物のタイトルEarth and Space 2014: Engineering for Extreme Environments - Proceedings of the 14th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments
    出版社American Society of Civil Engineers (ASCE)
    ページ266-273
    ページ数8
    ISBN(印刷版)9780784479179
    DOI
    出版ステータスPublished - 2014
    イベント14th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments: Engineering for Extreme Environments, Earth and Space 2014 - St. Louis, United States
    継続期間: 2014 10 272014 10 29

    Other

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

    ASJC Scopus subject areas

    • 環境工学
    • 建築および建設

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