Effect of collision parameters in electronegative plasma sheath with two species of positive ions

2013 ◽  
Vol 20 (9) ◽  
pp. 094501 ◽  
Author(s):  
R. Moulick ◽  
M. K. Mahanta ◽  
K. S. Goswami
Keyword(s):  
Plasma Sheath ◽  
Electronegative Plasma ◽  
Positive Ions

scholarly journals Potential distribution around a charged dust grain in an electronegative plasma

2010 ◽  
Vol 76 (5) ◽  
pp. 673-676 ◽  
Author(s):  
P. K. SHUKLA ◽  
L. STENFLO
Keyword(s):  
Potential Distribution ◽  
Negative Ions ◽  
Plasma Sheath ◽  
Dust Particles ◽  
Charged Dust ◽  
Electronegative Plasma ◽  
Positive Ions ◽  
Dust Grain ◽  
Bulk Plasma

AbstractThe potential distribution around a charged dust grain in an electronegative plasma is obtained by using the appropriate dielectric susceptibilities for the Boltzmann distributed electrons and negative ions, and for the inertial positive ions that are streaming from the bulk plasma into the electronegative plasma sheath. The existence of oscillatory ion wakefields is shown. Positive ions are trapped/focused in the ion wakefields, and subsequently the negative dust particles are attracted to each other, forming ordered dust structures.

Numerical study of the sheath in magnetized dusty plasma with two-temperature electrons

2014 ◽  
Vol 81 (1) ◽  
Author(s):  
I. Driouch ◽  
H. Chatei ◽  
M. El Bojaddaini
Keyword(s):  
Dusty Plasma ◽  
Numerical Study ◽  
Plasma Sheath ◽  
Hot Electrons ◽  
Dust Grains ◽  
Magnetized Dusty Plasma ◽  
Positive Ions ◽  
Different Temperatures ◽  
Dimensionless Variables ◽  
Two Temperature

Fluid simulations are used to investigate a multi-component magnetized dusty plasma sheath. The model consists of positive ions, dust grains, and two species of electron populations. These electrons are assumed to be a sum of two Maxwellian distributions with two different temperatures (cold and hot). According to multi-fluid equations and some dimensionless variables, the dimensionless equations are obtained and solved numerically. The effect of the presence of the hot electrons in the sheath is examined. A significant change is observed in the quantities characterizing the sheath with respect to one species electrons (cold) assumption.

Plasma sheath evolution from perturbed electrodes in a negative-ion plasma. Part 2. Experiment and PIC simulation

1997 ◽  
Vol 58 (3) ◽  
pp. 455-466 ◽  
Author(s):  
SEUNGJUN YI ◽  
YASSER EL-ZEIN ◽  
KARL E. LONNGREN ◽  
TERENCE E. SHERIDAN
Keyword(s):  
Fluid Model ◽  
Negative Ions ◽  
Plasma Sheath ◽  
Negative Ion ◽  
Pic Simulation ◽  
Particle In Cell ◽  
Model Code ◽  
Positive Ions ◽  
Ion Plasma ◽  
Quasineutral Plasma

The two-dimensional spatial and temporal evolution of a plasma surrounding an electrode whose potential is suddenly decreased is experimentally investigated. The electrode contains a localized convex or a localized concave perturbation. The quasineutral plasma consists of positive ions and various proportions of negative ions and electrons. The results are compared and contrasted with those that are obtained numerically using a particle-in-cell (PIC) simulation and those that had previously been obtained using a fluid-model code.

Dust-ion-acoustic nonlinear waves in a dusty electronegative plasma with vortex-like negative ions

2012 ◽  
Vol 79 (2) ◽  
pp. 233-238 ◽  
Author(s):  
N. ROY ◽  
S. S. DUHA ◽  
A. A. MAMUN
Keyword(s):  
Nonlinear Waves ◽  
Negative Ions ◽  
Reductive Perturbation Method ◽  
Charge Fluctuation ◽  
Ion Dynamics ◽  
Electronegative Plasma ◽  
Dust Charge ◽  
Positive Ions ◽  
Basic Features ◽  
Positive Ion

AbstractThe basic features of the nonlinear waves, which are associated with positive ion dynamics and dust charge fluctuation, have been investigated by employing the reductive perturbation method in a dusty electronegative plasma containing Boltzmann electrons, vortex-like negative ions, mobile positive ions, and charge fluctuating stationary dust (negatively charged). It has been observed that the basic features of the nonlinear waves (viz. amplitude, width, speed, etc.) in the plasma system under consideration have been significantly modified by the trapping parameter (introduced for vortex-like distribution of negative ions). The implications of the results (obtained from this investigation) in space and laboratory experiments have been briefly discussed.

Sign in / Sign up

Export Citation Format

Share Document