Abstract We review observations of the plasma waves associated with collisionless shocks, and summarize our understanding of their generation mechanisms and importance to shock physics. The emphasis is on waves generated directly at the shock, especially ion acoustic and lower-hybrid-like modes. The observations are discussed in the context of shock structure, with attention to the distinctions between waves generated in the shock foot and ramp. The behavior of resistive, dispersive and supercritical quasiperpendicular shocks is contrasted. Evidence for the operation of various generation mechanisms, including interactions with cross field currents, gyrating reflected ions and field aligned electron beams, are summarized. The various forms of plasma heating which are actually observed are then outlined and the role of the various wave modes in this heating is discussed. We argue in conclusion that, while plasma wave turbulence may play a vital role in plasma heating for some special shocks, it is of second order importance in most cases.


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    Titel :

    Plasma wave signatures of collisionless shocks and the role of plasma wave turbulence in shock formation


    Beteiligte:
    Mellott, M.M. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    01.01.1986


    Format / Umfang :

    8 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch