AbstractIn this study the roles of polar perpendicular diffusion and drifts are illustrated in a model containing a heliosheath and diffusive shock acceleration as applied to the solar wind termination shock. Of particular interest is the relation of polar perpendicular diffusion to particle drifts and how the effectiveness of the termination shock acceleration of galactic and anomalous protons is influenced by this relation. We found that drifts have a more prominent effect than the polar enhancement of perpendicular diffusion so that its omission from termination shock models would produce unrealistically large shock acceleration and consequently also larger modulation effects throughout the heliosphere. The computed spectra at a heliolatitude of 35° are almost similar for the two polarity epochs indicating that the two Voyager spacecraft might not observe differences between the two cycles in future.


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    Titel :

    Modulation of cosmic rays: Perpendicular diffusion and drifts in a heliosphere with a solar wind termination shock


    Beteiligte:
    Potgieter, M.S. (Autor:in) / Langner, U.W. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 35 , 4 ; 554-561


    Erscheinungsdatum :

    2005-01-04


    Format / Umfang :

    8 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Modulation of cosmic rays: Perpendicular diffusion and drifts in a heliosphere with a solar wind termination shock

    Potgieter, M. S. / Langner, U. W. / COSPAR | British Library Conference Proceedings | 2005




    Solar Modulation of Galactic Cosmic Rays: The 3D Heliosphere

    Heber, B. / Potgieter, M. S. / Ferrando, P. et al. | British Library Conference Proceedings | 1997