Volume 84, Number 3, November 2008
|Number of page(s)||5|
|Section||Physics of Gases, Plasmas and Electric Discharges|
|Published online||16 October 2008|
Roles of adiabaticity and dynamics of electrons and ions on dust-ion-acoustic K-dV solitons
Department of Physics, Jahangirnagar University - Savar, Dhaka-1342, Bangladesh
Accepted: 18 September 2008
A dusty plasma containing adiabatic inertial electrons and ions, and negatively charged static dust is considered in order to investigate the roles of dynamics and adiabaticity of electrons and ions on dust-ion-acoustic (DIA) Korteweg-de Vries (K-dV) solitons. The standard reductive perturbation method is employed for this theoretical investigation of DIA K-dV solitons in such a realistic adiabatic dusty plasma. It is found that i) the role of electron dynamics in modifying the basic features of the DIA K-dV solitons is insignificant; ii) the combined effects of adiabatic electrons and negatively charged static dust significantly modify the basic properties (speed, amplitude, and width) of the K-dV DIA solitons; and iii) due to the effect of the adiabaticity of electrons, one cannot have negative DIA K-dV solitons, which can exist in an isothermal dusty plasma (containing isothermal electrons, cold ions, and negatively charged static dust) for α =zdn/n > 2/3, where zd is the number of electrons residing onto a dust grain surface, n is the constant (static) dust number density and n is the equilibrium ion number density. The implications of our realistic dusty plasma model and of our results in space and laboratory dusty plasma are discussed.
PACS: 52.27.-h – Basic studies of specific kinds of plasmas / 52.27.Lw – Dusty or complex plasma; plasma crystals / 52.35.Sb – Solitons; BGK modes
© EPLA, 2008
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