Some aspects of the double layer structure in magnetized electronegative plasmas with q-nonextensive electrons

In this paper, the double layer (DL) structure in a magnetized electronegative plasma consisting of ions and nonextensive electrons is studied by using the reductive perturbation method. The basic set of fluid equations is reduced to the extended Korteweg-de Vries equation. It is shown that around the critical density, DL structures coexist. The effects of negative to positive ion density ratio (beta), nonextensive index (q), the angle between the directions of the wave propagation vector and the external magnetic field (l(z)), and positive (negative) ion gyrofrequency (Omega +/-) and positive to negative ion mass ratio (Q) on DL structure are discussed. (C) 2015 AIP Publishing LLC.