Abstract The charging dynamics of ice particles in plasmas (e.g. for planetary ring dynamics) is highly dependent upon the secondary-electron yields of the ices. To this end, the secondary-electron yields of H2O, CO2, NH3 (ammonia) and CH3OH (methanol) ices have been measured in a scanning electron microscope as a function of the electron-beam energy in the 2–30 keV energy range. Estimates are given for the maximum secondary-electron yield Y max of each ice and the energy E max at which this maximum yield occurs and the implications of these estimates are discussed in terms of solar system ices. Based on these results and a general literature review of Y max values for nonconducting materials, it is suggested that a typical range to quote for the secondary-electron yield of ices should be about 1–10. This is much lower than the range of 1–30 that is presently quoted in the space physics community.


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    Titel :

    Secondary-electron yields of solar system ICES


    Beteiligte:

    Erschienen in:

    Advances in Space Research ; 13 , 10 ; 183-187


    Erscheinungsdatum :

    1993-01-01


    Format / Umfang :

    5 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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