Eur. Phys. J. AP 14, 131-135 (2001)
https://doi.org/10.1051/epjap:2001148

Effect of the magnetic field on the plasma parameters in the cathode fall region of the DC-glow discharge

Phys. Dept., Faculty of Science, Benha University, Benha, Egypt

Corresponding author: hassouba@Yahoomail.com

Received: 23 July 2000
Revised: 24 January 2001
Accepted: 14 February 2001
Published online: 15 May 2001

Abstract

Low-density plasma is generated in a cylindrical DC magnetron discharge tube. Distribution of the magnetic field strengths in the radial and axial directions is drawn. Langmuir probe data are obtained at the edge of the cathode fall region of Ar gas discharge at pressure range from 0.5 to 4.0 torr. In the presence of the magnetic field, values of the electron temperature T_e are smaller than that without magnetic field. While plasma density N_e increases by a factor of two than that without magnetic field. The electron density increases with magnetic field due to electron magnetic confinement. Also, the radial distribution of T_e and N_e in the cathode fall region of the glow discharge is discussed. The magnetic field drift velocity plays an important role to make the radial distribution of T_e and N_e slightly changed.