Arbitrary amplitude inertial Alfvén waves in homogeneous magnetized electron-positron-ion plasmas

Shahzad Mahmood (1, 2) , H. Saleem (1, 2)

1 PINSTECH - Pakistan Institute of Nuclear Science and Technology
2 COMSATS - Department of Physics, COMSATS Institute of Information Technology

Nonlinear set of equations for inertial or slow shear Alfvén wave (SSAW) in ideal electron-positron-ion (e-p-i) plasmas are presented. The analytical solution for arbitrary amplitude SSAW in such multi-component plasmas is obtained using Sagdeev potential approach. The numerical solutions for several different cases have also been presented for illustrative purpose. It is found that the electron density dips of SSAW are formed in the super Alfvénic region. The amplitude and the width of the nonlinear shear Alfvén wave reduces with the increase in the concentration of positrons in electron-ion (e-i) plasmas. The width of the soliton also depends upon the direction of propagation of the perturbation in both e-i and e-p-i plasmas.

Domaines: Physique des plasmas [physics.plasm-ph]

Shahzad Mahmood, H. Saleem. Arbitrary amplitude inertial Alfvén waves in homogeneous magnetized electron-positron-ion plasmas. 2004. ⟨hal-00002760⟩