Počet záznamů: 1

Theory and observation of electromagnetic ion cyclotron triggered emissions in the magnetosphere

  1. 1.
    0357117 - UFA-U 2011 RIV US eng J - Článek v odborném periodiku
    Omura, Y. - Pickett, J. - Grison, Benjamin - Santolík, Ondřej - Dandouras, I. - Engebretson, M. - Décréau, P. M. E. - Masson, A.
    Theory and observation of electromagnetic ion cyclotron triggered emissions in the magnetosphere.
    Journal of Geophysical Research. Roč. 115, A7 (2010), A07234/1-A07234/13 ISSN 0148-0227
    Grant CEP: GA ČR GAP205/10/2279; GA AV ČR IAA301120601
    Výzkumný záměr: CEZ:AV0Z30420517
    Klíčová slova: nonlinear wave growth * EMIC
    Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
    Impakt faktor: 3.303, rok: 2010

    We develop a nonlinear wave growth theory of electromagnetic ion cyclotron (EMIC) triggered emissions observed in the inner magnetosphere. We first derive the basic wave equations from Maxwell's equations and the momentum equations for the electrons and ions. We then obtain equations that describe the nonlinear dynamics of resonant protons interacting with an EMIC wave. The frequency sweep rate of the wave plays an important role in forming the resonant current that controls the wave growth. Assuming an optimum condition for the maximum growth rate as an absolute instability at the magnetic equator and a self-sustaining growth condition for the wave propagating from the magnetic equator, we obtain a set of ordinary differential equations that describe the nonlinear evolution of a rising tone emission generated at the magnetic equator.
    Trvalý link: http://hdl.handle.net/11104/0195462
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