Original scientific paper

The physical problem and the modelling of the sheath in collisional dusty plasma

M. Eddahby ; Laboratoire de Physique de la Matière Condensée, Faculté des Sciences Ben M'sik, B.P. 7955, Casablanca, Maroc
M. Samir ; Laboratoire de Physique de la Matière Condensée, Faculté des Sciences Ben M'sik, B.P. 7955, Casablanca, Maroc
A. Dezairi ; Laboratoire de Physique de la Matière Condensée, Faculté des Sciences Ben M'sik, B.P. 7955, Casablanca, Maroc
D. Saifaoui ; Laboratoire de Physique Théorique, B.P. 5366 Maarif, Groupe de Physique des Plasmas, Faculté des Sciences Ain chock, Casablanca, Maroc
M. El Mouden ; Laboratoire de Physique Théorique, B.P. 5366 Maarif, Groupe de Physique des Plasmas, Faculté des Sciences Ain chock, Casablanca, Maroc
O. El Haitami ; Laboratoire de Physique de la Matière Condensée, Faculté des Sciences Ben M'sik, B.P. 7955, Casablanca, Maroc

Abstract

The aim of this paper is to study the behaviour of sheath structure in plasma with collisions, and simulation of the effects of collisionality on the plasma sheath using the Runge-Kutta routine. We consider the near-wall region of an unmagnetized dusty plasma which consists of electrons, ions, micron-size dust particles and neutral particles. Since the dust particles are much heavier than electrons and ions, the latter are assumed to be out of thermal equilibrium with dust as a cold fluid. The neutrals are taken as immobile. Precise numerical solutions of the model are used to determine the collisional dependence of the sheath width and the impact energy at the wall.

Keywords

sheath; dusty plasma; sheath width; collisional parameter; impact energy

Hrčak ID:

302237

URI

https://hrcak.srce.hr/302237

Publication date:

2.5.2007.

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