AbstractThe previous results on the magnetosheath plasma investigation show that the magnetosheath ion population often consists of a shocked solar wind and a magnetospheric component with a higher energy. Both these components are usually considered as having a Maxwellian energy ion distribution function (DF), whereas measurements with sufficient temporal and angular resolution reveal a “beam” structure of DF in a large region downstream of the bow shock. In this contribution we present experimental data demonstrating such structure in the low-energy part (up to 20 keV) of the ion DF in that region. We suggest some processes likely to be responsible for the creation of a smooth magnetosheath DF from the narrow beams which originated in the shock. Our results give a high degree of correlation between these processes and the magnetic field fluctuations. We are led to the conclusion that either the low-frequenccy waves with high amplitudes are generated during the relaxation process or the assumption of frozen-in magnetic field does not hold with sufficient accuracy.


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    Titel :

    Ion distribution function in the magnetosheath: Fine structure


    Beteiligte:
    Safrankova, J. (Autor:in) / Nemecek, Z. (Autor:in) / Santolik, O. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    01.01.1994


    Format / Umfang :

    4 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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