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Parametric instabilities of circularly polarized Alfvén waves in a relativistic electron-positron plasma
1Department of Earth System Science and Technology, Kyushu University, Fukuoka, 816-8580, Japan.
Abstract:
Dispersion relation and nonlinear evolution of the parametric instabilities of circularly polarized Alfvén waves in a relativistic electron-positron plasma are investigated by theoretical and numerical approaches. In the nonrelativistic limit, when 2omega(2)(p)>omega20, the characteristics of the instabilities are similar to those in an electron-ion plasma, except that the modulational instability takes place only if v(2)(s)