Abstract This model explains why breakup has been observed as low as L = 5–6 and predicts that a higher concentration of O+ in the plasma sheet will permit breakup at such low L values. It is argued that the establishment of a coupled current structure within a single arc leads to a quasi-stable system i.e. the pre-breakup regime. Perturbation of the pre-breakup structure leads to an instability criterion. Certain quiescent configurations are inherently unstable. Thus transitions from a stable to an unstable situation can trigger a rapid poleward expansion of the quiescent arc or substorm breakup. In our model the kinetic energy of injected plasma from the magnetotail supplies the energy for breakup.


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    Titel :

    Substorm breakup on closed field lines


    Beteiligte:
    Rothwell, P.L. (Autor:in) / Block, L.P. (Autor:in) / Silevitch, M.B. (Autor:in) / Fälthammar, C.-G. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 8 , 9-10 ; 347-350


    Erscheinungsdatum :

    01.01.1989


    Format / Umfang :

    4 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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