Highlights Permittivity and permeability of lunar simulants important to NASA were measured at 2.45 GHz. A temperature range of −185 °C to 250 °C was investigated. The simulants JSC-1A, NU-LHT-4 M, NUW-LHT-5 M, CSM-LHT-1G were studied. Pyroxenite and anorthosite from the Stillwater mine, Montana, and synthetic glass were measured. For a single simulant a linear relationship between sample density and permittivity is suggested.

    Abstract Lunar simulants are used to approximate the behavior of the lunar regolith. This work focuses on materials responses relevant for microwave heating to inform in-situ resource utilization of lunar regolith for landing pads and building infrastructure. Microwave dielectric permittivity and magnetic permeability measurements have been made for the first time on several new highland lunar simulants (NU-LHT-4M, NUW-LHT-5M and CSM-LHT-1G). One mare lunar simulant (JSC-1A) is included in this work. We present these measurements in the low temperature range −185 °C to 250 °C and in the frequency range 50 MHz to 3 GHz. The dominant minerals in the simulants are the minerals bytownite, ortho- and clino-pyroxenes, olivine, and glass. Less complex rock feedstocks for highland simulants, anorthosite and pyroxenite, were also measured separately. The dielectric measurements were performed on samples having different densities. Differences in the dielectric responses were noted, however all simulants were weak microwave absorbers at the low temperatures. This data assists with planning for a hybrid approach to microwave sintering at the lunar south pole.


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    Titel :

    Microwave permittivity and permeability measurements on lunar simulants at low temperatures


    Beteiligte:
    Barmatz, Martin (Autor:in) / Steinfeld, David (Autor:in) / Batres, Jonathan (Autor:in) / Hao, Hsin-Yi (Autor:in) / Rickman, Douglas (Autor:in) / Shulman, Holly (Autor:in)

    Erschienen in:

    Advances in Space Research ; 72 , 10 ; 4503-4516


    Erscheinungsdatum :

    2023-08-23


    Format / Umfang :

    14 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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