Mustafa Kamel Jassim

• PhD Plasma Physics - MS Laser Physics
• Retired at University of Baghdad

The present study analyzes the electron energy distribution function and the electron transport coefficient for N2, SF6 gas and its mixture using the (BOLSIG+) program for a range of reduced electrical field strength (50-500) Td under steady state conditions. The paper mainly explores the effects of adding N2 to SF6 gas on EEDF and the correspondin...

In this paper, we utilize an equilibrium discharge model coupled with an ICP torch system by means of a numerical simulation using COMSOL Multiphysics software package to investigate the properties of the temperature field, velocity flow, and electrical conductivity under different inductance coils and input power variables. We discuss how these pr...

Using the transport of ions in matter program which is the TRIM program that based on a Monte Carlo simulation method to calculate the sputtering yield for polypropylene, that was bombed with (N2, O2, and Ar) ions of gas in ions energy range (0.1-300) Kev and for different angles. It can be seen from the results of this study the sputtering yield d...

We have considered the electron transport coefficients and swarm parameters of pure nitrogen and methane gases and their mixtures for a large range of reduced electric field from 30 to 700 Td, using BOLSIG+ freeware. We inspect the relevant coefficients and parameters of pure methane and nitrogen that calculated in the program and visualized graphi...

In this paper, we calculate the electron energy distribution function (EEDF) and transport parameters including the electron mean energy, mobility, drift velocity and diffusion coefficient for the gas mixtures of the H2 and N2 using the EEDF program. It is concentrated on the effect of assorted concentrations of the mixtures on the EEDF and the ele...

The influence of ambient temperature on the various parameters of negative corona discharge in atmospheric dry air with coaxial cylindrical electrodes is investigated. The calculations are achieved using the finite element method by COMSOL Multiphysics software. The investigation aims to notice the effect many of working temperatures on the I-V cha...

In this paper, we calculate the electron energy distribution function (EEDF) and transport parameters including the electron mean energy, mobility, drift velocity and diffusion coefficient for the gas mixtures of the H2 and N2 using the EEDF program. It is concentrated on the effect of assorted concentrations of the mixtures on the EEDF and the ele...

We investigate the influence of Ar and N2 gas mixtures on the electron energy distribution EEDF function and the corresponding electron transport coefficients ETCs, by utilizing (EEDF) program to solve the Boltzmann transport equation. The study has an importance in the studies of N2 glow discharge to determine the appropriate best mixtures ratio t...

The sputtering yield was calculated for the BeCu alloy, which were bombarded by N2, O2, and Ar ions in energy range (0.1-50) Kev. The TRIM was used to get the sputtering yield of BeCu alloy target. TRIM is founded on Monte Carlo simulation (MCs) method. The results showed the sputtering yield depends on the incident ions energy, the incident angle,...

Comsol multiphysics software is established to make a simulation that is comparable with experimental device. by utilizing comsol, the positive column domain of direct-current glow discharge with argon is considered for both of different applied voltage and working gas pressure. The calculations are exhibited by using a precise collision cross sect...

The objective of this study is to study electron transfer parameters for the Xe-CO2 and Kr-CO2 mixture used in the CO2 laser. Different ratios of both mixtures were studied. The electron transport parameters include the electron drift velocity, mean energy, the characteristic energy, mobility and longitudinal diffusion coefficient of carbon dioxide...

In this study, the effect of humidity on the diffusion coefficient of radon gas and the diffusion length was studied in different soils. We have used a modern device (SARAD Germanmade) was used to calculate the concentration of radon in different degrees of humidity and temperature. After linking it to the exposure system for radon, which was made...

The available experimental data of proton electronic stopping power for Polyethylene, Mylar, Kapton and Polystyrene are compared with Mathematica, SRIM2013, PSTAR and libdEdx programs or databases. The comparison involves sketching out both experimental and databases data for each polymer to discuss the agreement. Further, we use statistical means...

Extended calculations for sputtering yield through bombed Iron-target by (H,D ,T ,He) ions plasma are accomplished .The calculations include changing the input parameters : the energy of (H,D ,T ,He) ions plasma, the hit target angle of Iron, change atomic mass of incident ion. The program TRIM is used to accomplish these calculations. The results...

We calculated the electron transport coefficient in Ar, O2 and their mixtures for ratio of E/N where E denotes the electric field and N the density of gas atoms from 5 – 600 Td 1Td = 10⁻¹⁷ V.cm². The result and parameters mean energy mobility drift velocity and others are calculated by solving Boltzmann equation. We study these gases because of its...

A comparative comparison among the experimental electronic stopping power with some common program data for proton, Helium, and Boron ions with different targets are graphically achieved. For certain specific energy ranges the impact of various programs is investigated by using two statistical tests. The tests are Chi square goodness of fit and sta...

The Boltzmann equation has been solved using (EEDF) package for a pure sulfur hexafluoride (SF6) gas and its mixtures with buffer Helium (He) gas to study the electron energy distribution function EEDF and then the corresponding transport coefficients for various ratios of SF6 and the mixtures. The calculations are graphically represented and discu...

Proton stopping powers for some biological phantoms have been calculated using PSTAR database and SRIM program. The data are compared and plotted graphically and then has been studied. Two simplified fitting equations are proposed and discussed for both programs. The presented fitting formula for data with the corresponding coefficients for certain...

Calculations of sputtering yield for Lithium,Sodium and Krypton bombarded by the same own ions are achieved by using TRIM program.The relation of angular dependent of sputtering yield for each ion/target is studied. Also, the dependence of the sputtering yield of target on the energy of the same ion is discussed and plotted graphically. Many resear...

Using a reduction of TRIM simulation data, the sputtering yield behaviour of Zinc target bombard by heavy Xenon ions plasma is studied. The sputtering yield as a function of Zinc layer width, Xenon ion number, energy of ions, and the angle of ion incidence are calculated and illustrated graphically. The corresponding energy loss due to ionization,...

The dispersion relation of linear quantum ion acoustic waves is derivate according to a fluid approach that depends on the kinetic description of the systems of charged particles model. We discussed the dispersion relation by changing its parameters and graphically represented. We found through graphs that there is full agreement with previous stud...

The program (EEDF) is employed to solve Boltzmann equation to study the electron energy distribution function EEDF and the transport coefficients of pure sulfur hexafluoride gas and its mixtures with Neon gas. In this paper it is focused on the effect of various concentrations of the gas mixtures on the EEDF and the corresponding transport coeffici...

The stopping powers for water, bones, muscles, and tissues of human body have been calculated in the range of proton energies 0.5-200 MeV using some empirical, numerical relations, SRIM software and PSTAR database. We suggest using two simple fitting formulas for PSTAR database. Further, we found other forms of available stopping power equations. T...

The quantum hydrodynamic in one dimensional model of three species in the limit of small mass ratio of the charge carriers is considered to study the nonlinear quantum dust ion-acoustic waves. By adopting equation of state that has zero-temperature, Fermi gas for the electrons and by appropriate normalizing of the variables, a non-dimensional param...

A theoretical designed plasma focus device is achieved using the mathematical Lee Code model. The effect of changing the pressure is upon the global parameters are studied. A well comparison with working standard plasma focus is done, and the designed plasma focus reflects a wide compatible behavior well as with the standard plasma focus. Moreover,...

Theoretical calculations are achieved to study the effect of different Argon pressures on various parameters for UNU/ICTP PFF, a plasma focus using Lee code. Without changing the geometry and electrical parameters of this machine which build originally to work with deuterium we compute theoretically the X-ray emission energy using argon as working...

Theoretical calculations are achieved to study the effect of different deuterium pressures on various characteristics parameters for PF400J plasma focus using an international computer code. Axial and radial velocities, voltage tube, plasma temperatures, and neutron yields at different operating deuterium pressures are computed. Neutron emission ha...

A mathematical and computer simulation have been achieved for the collisional processes in dusty plasma sheath, including the effect of power law dependence for cross section on particles energy. Based on this model exact numerical solution of sheath governing equations using Runge-Kotta' routines are obtained for special case of constant dust mobi...

A solution of BDN1 dye dissolved in chlorobenzene showed a nonlinear effect which developed a self focusing when used as a passive Q-switch for a Nd:Yag laser. Our finding revealed an incease in the energy of the output pulse as the dye concentration rises. This is an apposite behaviour to the usual case and is attributed to partial saturation of t...