Abstract The transport of magnetospheric plasma during dynamical reconfigurations of the geomagnetic field is investigated by means of three-dimensional single particle codes. It is shown that the “tail-like” to “dipole-like” magnetic transitions which accompany the development of substorms, yield rapid injections of mid-tail (∼ 10–15 RE) ions into close L-shells. It is demonstrated that, during this transport, the guiding center is at stake depending upon particle mass and/or charge state. Particularly, for singly-charged heavy ions such as O+, the simulations demonstrate that the “dipolarisation” process goes together with intense energization (possibly a factor 1000) and pitch angle diffusion. On such basis, it is argued that the high-latitude ionospheric outflows form potential plasma sources for the ring current, owing to their location upstream of the near-Earth plasma sheet. A further examination of the storm-time trajectories reveals a clear inward boundary for the newly created energetic populations, which corresponds to the post-dipolarisation “image” of their non-adiabatic threshold in the geomagnetic tail.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A quantitative study of ion transport during substorms


    Contributors:

    Published in:

    Advances in Space Research ; 11 , 9 ; 171-175


    Publication date :

    1991-01-01


    Size :

    5 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Magnetic reconnection during magnetospheric substorms

    Baker, D. N. | British Library Online Contents | 1996


    Predicting substorms

    Siscoe, G. L. / Maynard, N. C. | British Library Online Contents | 1996


    Reconnection During Substorms and Solar Flares

    Podgorny, A. I. / Podgorny, I. M. / COSPAR; Scientific Commission D | British Library Conference Proceedings | 1997


    Configuration of the Geomagnetic Tail During Substorms

    D. H. Fairfield / N. F. Ness | NTIS | 1970