| Popis: |
In the present paper, the effect of charge accumulation on Kruskal - Schwarzschild instability is investigated by considering the displacement current term in Ampere’s law. Employing the non-ideal MHD equations as well as linear perturbation theory, the growth rate of Kruskal - Schwarzschild instability is studied by deriving the growth rate relation analytically. Employing the numerically method, the comparison between the stabilizing role of the magnetic field and the destabilizing role of charge accumulation on the growth rate of instability has been investigated in the broad range of wave number and the wave propagation angle, φ, respect to external magnetic field. The results show that for φ < 60°, the stabilizing effect of the magnetic field overcomes the destabilizing effect of charge accumulation and so the growth rate decreases with increasing Alfven speed. While for φ > 60°, there is a critical point, defined k*c, at which the behavior of instability growth rate curves has been changed with Alfven speed. In this manner, the destabilizing effect of charge accumulation overcomes the stabilizing effect of the magnetic field for k* < k*c and the growth rate increases with increasing Alfven speed, but for k* > k*c the stabilizing effect of the magnetic field overcomes the destabilizing effect of charge accumulation and the growth rate decreases with increasing Alfven speed. |
