AbstractElectric currents across the magnetic field can occur in the solar atmosphere because of quasi-stationary magnetic shear, plasma non-uniformity, or MHD waves. We propose a new physical mechanism that can cause the anomalous dissipation of these currents and initiate energy release in solar plasmas. In the framework of linear kinetic theory, we show that the cross-field currents are unstable with respect to low-frequency perturbations. The instability growth rate is quite high, about 2% of the ion-cyclotron frequency when the differential electron/ion velocity is 0.2 of the ion thermal speed. We identify the unstable perturbations as degenerated ion-acoustic modes coupled with backward kinetic Alfvén modes.


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    Titel :

    Oblique aperiodic instability driven by cross-field current in space plasmas


    Beteiligte:
    Siversky, T. (Autor:in) / Voitenko, Yu. (Autor:in) / Goossens, M. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 37 , 3 ; 625-629


    Erscheinungsdatum :

    2005-01-12


    Format / Umfang :

    5 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Oblique aperiodic instability driven by cross-field current in space plasmas

    Siversky, T. / Voitenko, Y. / Goossens, M. et al. | British Library Conference Proceedings | 2006



    Current Collection from Space Plasmas

    N. Singh / K. H. Wright / N. H. Stone | NTIS | 1990



    Local and global effects of the cross-field current instability

    Lui, A. T. Y. | British Library Online Contents | 1996