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    Self-modulation of nonlinear waves in a weakly magnetized relativistic electron-positron plasma with temperature

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    Asenjo_2012.pdf (2.383Mb)
    Date
    2012-04
    Author
    Asenjo, Felipe A.
    Borotto, Felix A.
    Chian, Abraham C. L.
    Munoz, Victor
    Valdivia, J. Alejandro
    Rempel, Erico L.
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    Abstract
    We develop a nonlinear theory for self-modulation of a circularly polarized electromagnetic wave in a relativistic hot weakly magnetized electron-positron plasma. The case of parallel propagation along an ambient magnetic field is considered. A nonlinear Schrodinger equation is derived for the complex wave amplitude of a self-modulated wave packet. We show that the maximum growth rate of the modulational instability decreases as the temperature of the pair plasma increases. Depending on the initial conditions, the unstable wave envelope can evolve nonlinearly to either periodic wave trains or solitary waves. This theory has application to high-energy astrophysics and high-power laser physics.
    Department
    Fusion Studies
    Subject
    pulsar radio-emission
    electromagnetic solitons
    ion plasma
    cyclotron
    waves
    cold-plasma
    microstructure
    field
    URI
    http://hdl.handle.net/2152/61141
    Citation
    Asenjo, Felipe A., Felix A. Borotto, Abraham C-L. Chian, Víctor Muñoz, J. Alejandro Valdivia, and Erico L. Rempel. "Self-modulation of nonlinear waves in a weakly magnetized relativistic electron-positron plasma with temperature." Physical Review E 85, no. 4 (2012): 046406.
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