International Journal of Science and Research (IJSR)
ISSN (Online): 2319-7064
Index Copernicus Value (2015): 78.96 | Impact Factor (2015): 6.391
Volume 6 Issue 7, July 2017
www.ijsr.net
Licensed Under Creative Commons Attribution CC BY
Effect of Secondary Electron Emission Product
Factor on Electron and Ion Densities and Electron
Kinetic Energy for Ar Gas Discharge Plasma by
using OOPIC PRO Simulation Code
Noor A. Ahmed
1
, Mohammed R. Abdulameer
2
1,2
Department of physics, College of Science, University of Baghdad, Baghdad, Iraq
Abstract: In this research, Ar gas discharge plasma was simulated by using OOPIC Pro simulation code. The conditions of the
simulation were adopted at simulation time 10
-6
s, initial electron and ion densities 10
16
m
-3
, Ar gas pressure 0.5mbar. Electron and ion
densities and electrons kinetic energy were investigated by varying secondary electron emission product factor (γ) and fixing other
simulation factors.For γ=0.1,0.2 and 0.3 it has been found that kinetic energy of electron and electron and ion densities will be affected,
the results have been analyzed and discussed.
Keywords: gas discharge plasma, electronnumber density, plasma physics, ion number density, secondary electron emission, OOPIC Pro
1. Introduction
The passage of electric current through the gas result of an
electric field called gas discharge. In the region where the
flow of electricity is formed gas-discharge plasma. Its
characteristics depend on both the external electric field and
the geometry of the gas discharge. The most common type
of gaseous discharge is the glow ,arc discharge and
Townsend takes the place of a cylindrical tube for a fixed
electric field where the plasma is a semi-neutral gas of
charged and neutral particles showing collective behavior
[1].
The term "gas discharge" refers to discharge in a large plate
through the air gap, while it is now used in the electric
current that is through by the ionized gas. Plasma pattern
formation is studiedby coupling Maxwell equations, plasma
equations [2].
For the glow-discharge model of Ar, we need a chemical
reaction mechanism that is capable of representing all the
significant effects of chemistry as a limited rate in the
equilibrium of the plasma air [3].
It has not been sufficiently reduced to enable possible
computational simulation in two and three dimensions,
Computer simulation of the discharge of surface plasma to
interact with the flow of sound above pressure of
compression is a severe problem on a large scale [4]
The atmospheric pressure of plasma in Ar resulting from
electrostatic discharge has attracted considerable attention to
a wide range of application such as environmental and
biomedical and industrial applications such as air pollution
control, sewage cleaning, sterilization, bioremediation,
surface treatment, materials analysis, electromagnetic wave
modulation, carbon enrichment, nanotube growth [ 5–8 ]
The integration of all aspects of plasma into one single
model thus leads to an irreducible model. Particle
simulation, which is limited to single-dimensional models, is
performed mainly on a parallel panel and has been made an
important contribution to the understanding of the non-local
effect in the double discharge for capacity [9 – 10]. In this
paper , we will study effect of secondary electron emission
product factor on the physical parameter of Ar gas discharge
plasma by using OOPIC PRO simulation code, by varying γ
factor and fixing other simulation parameters.
2. OPIC Pro Simulation Code Procedure
OOPIC Pro is a rich mathematical simulation program with
two dimensional dimensions in cell simulation was designed
to model plasma packages of charged particles generated
externally for electric and magnetic fields and neutral gases
with low to moderate intensity using a wide range of
boundary conditions, the following code has been applied in
the current research :-
Dc2
{
@description a model of DC discharge
@keywords
@contact Tech- X Corporation
@version $Id : $
Copyright © ;2008, Tech –X Corporation
See license for condition of use
} Region
{
Species
{
name = electrons
m = 9.11E-31
q = -1.6E – 19
collision Model = 1
}
Species
{
name= ions
m=6.67e-26
q=1.6E-19
collision Model = 0
Paper ID: ART20175272 DOI: 10.21275/ART20175272 850