Fluid description of collisional current filamentation instability of a weakly ionized plasma in the presence of magnetic field

Hajisharifi, K; Tajik-Nezhad, S; Mehdian, H

doi:10.29252/ijpr.19.1.17

Fluid description of collisional current filamentation instability of a weakly ionized plasma in the presence of magnetic field

Authors

K Hajisharifi

S Tajik-Nezhad

H Mehdian

https://doi.org/10.29252/ijpr.19.1.17

Abstract

In this paper, the collisional filamentation instability of an electron beam-weakly magnetized and ionized plasma has been investigated in the presence of background plasma, using the fluid description. By describing the equilibrium configuration in the presence of binary collision terms between charged and neutral particles and using the local approximation method, the dispersion relation (DR) of instable mode (filamentation instability) has been obtained and the effect of collision and magnetic field driven-destabilization and current-driven stabilization on the growth rate of instability has been studied. The results show the cut-off wave number and the magnetic threshold for the filamentation instability in the collisional magnetized plasma in which the instability will disappear for the larger wave number and larger magnetic fields. Studies show that the value of cut-off wave number and magnetic threshold are raised by increasing the electron beam current density.

Keywords

current filamentation instability

wealky ionized plasma

magnetic field

fluid equations

collision

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