Qusay Adnan Abbas

• Professor
• Professor at University of Baghdad

Laser-induced breakdown spectroscopy of CuO plasma in the presence and absence of magnetic field has been investigated. The plasma was generated by employing Nd: YAG laser (532 nm, 9 ns) at various pulse laser energy ranging from 100 to 400 mj in a vacuum. The increasing of pulse laser energy in the presence and absence of the magnetic field ha...

This review provides a comprehensive analysis of recent advances in understanding Bohm diffusion in magnetron sputtering systems, a process critical for optimizing thin-film deposition. Bohm diffusion significantly influences the spatial distribution and energy of sputtered particles near the substrate, impacting the overall film quality and perfor...

The research investigated the effect of magnetic mirror configuration on the properties of plasma formed in a dielectric barrier discharge (DBD) actuator under atmospheric pressure. The discharge was formed when a high alternating voltage of 22 kV at a frequency of 9 kHz was applied between the electrodes under atmospheric pressure. The magnetic mi...

In this work, aluminium-doped zinc oxide (AZO) nanostructure at 0.3 wt% and 0.5 wt% Al was synthesized using the pulse-laser ablation technique in liquid(PLAL) using pulsed Nd: YAG laser of a fundamental wavelength of (1064 nm). The process was done in the absence and presence of an external magnetic field. The deposited AZO nanostructures by drop-...

The interaction between a pin-plate and plasma are representing an interest subject in plasma technology and applications. In this research, the influence of added NaCl to distilled water on the discharge characteristics that formed in the gap between pin-water surfaces was investigated in more details. Their electrical and optical characteristics...

In the present work, optical emission spectroscopy was used to diagnose the influence of A.C. power source frequency on the hollow magnetron sputtering discharge parameters (such as discharge emission, discharge current and voltage, glow discharge structure, temperature (Te) and electron number density (ne), Debye length (λD), and plasma parameter...

The discharge-liquid interactions represent one important topic in plasma technology and applications. In this research, the influence of added NaCl to distilled water on the discharge characteristics that formed in the gap between pin-water surfaces was investigated in more detail. Its electrical and optical characteristics define them. The optica...

OBJECTIVE The need to overcome the failure of orthodontic micro-implants which might reach to 30% has led to the development of different methods, one of which is nanoparticle deposition. AIM OF STUDY To evaluate the anti-microbial efficiency of TiO 2 and ZnO nanoparticles (NP) when used as a coating for orthodontic micro-implants. METHODS Thirty...

This paper investigates the effect of the AC discharge frequency, and the magnetic field on the discharge characteristics of a cylindrical magnetron sputtering device operating at constant argon pressure. The AC argon discharge was produced by applied high voltage alternating 10 kV with frequencies 7 and 9 kHz. The optical emission spectroscopy tec...

In this study, the effect of environment gas and working pressure of laser-induced breakdown spectroscopy from ZnO: Al composite target (AZO) enhanced by an external magnetic field on the magnetized characteristics and emission spectra of plasma were investigated. The plasma was induced by a Q-switched nanosecond Nd: YAG laser at a constant pulse l...

In this study, the surface of the epoxy/Al composite is treated using a dielectric barrier discharge (DBD) plasma in the presence of air. The epoxy composite was prepared by mixing 0.1g and 0.3 g aluminum powder with epoxy resin and its hardener in a ratio of 3:1. The surface epoxy/Al composite as a dielectric barrier layer (DB) is studied at an ap...

In this study, aluminum-doped zinc oxide (AZO) at 0.3 wt.% was synthesized by a pulsed Nd: YAG laser with a fundamental wavelength (1064 nm). The laser beam is focused on a ZnO-doped target immersed in distilled water at two pulse energies of 200 and 400 mJ. The procedure was applied in two cases: without and with the presence of the magnetic field...

In this work, one configuration was used to study the electrical discharge resulting from the dielectric barrier. This configuration consists of a sheet of epoxy/Al composite with dimensions of 75 mm in length, 25 mm in width, and 3 mm in thickness. This panel is located at the center of the electrodes, so that the distance between each of the elec...

In this study, the effect of environment gas and working pressure of laser-induced breakdown spectroscopy (LIBS) from ZnO: Al composite target (AZO) enhanced by an external magnetic field on the magnetized characteristics and emission spectra of plasma were investigated. The plasma was induced by a Q-switched nanosecond Nd: YAG laser at a constant...

Objective In the present paper, the influence of cylindrical magnetron configurations on the fundamental plasma parameters of the axial magnetic field was described in more detail. Methods The chamber of this system has consisted of two coaxial cylinders which are used as the electrodes of the system with the magnetic solenoid coil present in the...

The characteristics of atmospheric-pressure glow discharge (APGD) produced by rod-plate electrodes are experimentally determined. APGD is sustained by applying a high DC voltage between the electrodes. At atmospheric pressure, the shift from corona discharge to glow discharge is investigated. A rod-plate discharges configuration's volt–ampere prope...

This work is an experimental study about the effects of gas pressure and magnetic field on plasma characteristics produced in an internal hollow electrodes discharge (HED) system. The results show that the breakdown voltage values increase with increasing the working pressure (especially with the presence of a magnetic field). The breakdown voltage...

In the present work, the effect of the cylindrical configurations of the sputtering device electrodes on the plasma parameters (Debye length, electron temperature, electron density, plasma frequency) is studied. Also, the effect of the argon gas pressure on the discharge properties is examined with gas pressures of (0.08, 0.2, 0.4 and 0.6) Torr. Th...

This work is an experimental study conducted to study the effects of iron oxide dust particles (Fe2O3) on the characteristics of DC discharge plasma in argon gas under vacuum. Electron temperature ( ) and electron density (ne) were calculated by Boltzmann plots and Stark broadening, respectively. The results show that both the electron density and...

The study of the surface plasma characteristics under atmospheric pressure is a new branch and tool in physics. Building generation dielectric barrier discharge (DBD) system at atmospheric pressure and studying its thermal characterizations. The discharge was produced by applying a high voltage of 20 kV with a frequency of 8 kHz. The thermal charac...

In this present paper, an experimental study of some plasma characteristics in dielectric barrier discharge (DBD) system using several variables, such as different frequencies and using two different electrodes metals(aluminium (Al) and copper (Cu)), is represented. The discharge plasma was produced by an AC power supply source of 6 and 7 kHz frequ...

In this present paper, an experimental study of some plasma characteristics in dielectric barrier discharge (DBD) system using several variables, such as different frequencies and using two different electrodes metals(aluminium (Al) and copper (Cu)), is represented. The discharge plasma was produced by an AC power supply source of 6 and 7 kHz frequ...

C60 and C60-ZnO thin films were synthesized by spray pyrolysis method, and structural, chemical, optical and self-cleaning characterizations of this nanocomposite were performed before and after plasma treatment. The C60 thin film has a very wide peak in the range of 2θ = 15–35°, which indicates the amorphous structure of this film. After plasma tr...

The present work investigated the effect of distance from target surface on the parameters of lead plasma excited by 1064nm Q-switched Nd:YAG laser. The excitation was conducted in air, at atmospheric pressure, with pulse length of 5 ns, and at different pulse laser energies. Electron temperature was calculated by Boltzmann plot method based on the...

In this work, an experimental study was conducted about the effect of gas pressure on the growth rate of the mirror instability produced in hollow electrodes discharge (HED) plasma in two regions: inter-electrodes gap and internal cathode cavity, by optical emission spectroscopy. Optical emission spectroscopy measurements, at different gas pressure...

The plasma treatment efficient method used improving and Surface treatment of epoxy and increasing the surface roughness. In this paper, epoxy and epoxy/copper are modified by dielectric barrier discharge (DBD) Plasma in presence of air. Modification of the properties of epoxy by preparing doping systems with percentage 1% copper with two different...

In this paper, investigated the effects of working pressure and magnetic field on the characteristics of plasma produced by DC discharge in Argon gas by using optical emission spectroscopy (OES). The electron number density was measured using the broadening of Stark and the temperature of electron by Boltzmann plot. It was noted that the electron n...

Gold nanoparticles (Au NPs) were prepared by laser ablation of high purity gold bulk immersed in distilled water, the laser was Nd:YAG with fundamental wavelength (1064 nm) and energy per pulse of 700 mJ in presence and absence of the magnetic field. The prepared Au NPs were identified by many methods, like the UV-Visible, AFM, XRD and FTIR. It is...

In this paper, using Optical Plasma Emission technique, which is the most important diagnostic technique for characterizing plasma properties. By analyzing the emission spectrum at the wavelength range 320-600 nm. Data were obtained from Galileo National telescope at ultraviolet and visible wavelength for 153P/Ikeya– Zhang Comet, and NASA’s Hubble...

Gold nanoparticles (Au NPs) were prepared by laser ablation of high purity gold bulk immersed in distilled water, the laser was Nd: YAG with fundamental wavelength (1064 nm) and energy per pulse of 700 mJ in presence and absence of the magnetic field. The prepared Au NPs were identified by many methods, like the UV-Visible, AFM, XRD and FTIR. It is...

The production of semitransparent electrical conductive films is even more necessary due to their widespread utilization in research and industry. In this paper, the graphene oxide (GO) effects as an impurity on tin dioxide (SnO2) thin films and the SnO2–GO composite formation before and after plasma treatment have been studied to use in optoelectr...

The present work investigated the discharge characteristics in the magnetized hollow cathode system. Also, the gas pressure effect on the discharge characteristics has been examined with a gas pressure between (0.08 and 0.4) Torr. The voltage-current curve of magnetized hollow cathode discharges has the voltage become approximately constant with sl...

Graphene oxide

The present research focuses on composition of comets depending on the process of solar wind charge exchange (SWCX). The chemical composition of cometary nuclei was inferred from measurements of neutral and ionized gases from the coma, tail, and dust grains. Cometary high-energy emission depends on properties of both the comet and solar wind. Data...

In this paper, using Optical Plasma Emission technique, which is the most important diagnostic technique for characterizing plasma properties. By analyzing the emission spectrum at the wavelength range 320-600 nm. Data were obtained from Galileo National telescope at ultraviolet and visible wavelength for 153P/Ikeya-Zhang Comet, and NASA's Hubble S...

Laser ablation of a silver target immersed in distilled water using Nd:YAG laser with a fundamental wavelength of 1064nm was carried out to fabricate silver nanoparticles (Ag NPs) with different laser energy in the presence and absence of magnetic field. UV-Visible spectrum showed that the nanoparticles are almost spherical in shape. The number of...

In this study, graphene oxide (GO) and reduced graphene oxide were synthesized by pulsed Nd:YAG laser with a fundamental wavelength (1064 nm) focused on the pure graphite target which was immersed in distilled water. Different pulse energies were applied in two cases; with and without magnetic field. The synthesized GO and rGO nanoparticles were ch...

In this paper, Al and Cu Plasmas that produced by pulsed Nd:YAG laser with fundamental wave length with a pulse duration of 6 nS focused onto Al and Cu targets in atmospheric air are investigated spectroscopically. The influence of pulse laser energy on the some Al and Cu plasmas characteristics was diagnosed by using optical emission spectroscopy...

Aluminum plasma was generated by the irradiation of the target with Nd: YAG laser operated at a wavelength of 1064 nm. The effect of laser power density and the working pressure on spectral lines generating by laser ablation, were detected by using optical spectroscopy. The electron density was measured using the Stark broadening of aluminum lines...

Key words Aluminum plasma was generated by the irradiation of the target with Nd: YAG laser operated at a wavelength of 1064 nm. The effect of laser power density and the working pressure on spectral lines generating by laser ablation, were detected by using optical spectroscopy. The electron density was measured using the Stark broadening of alumi...

Key words Aluminum plasma was generated by the irradiation of the target with Nd: YAG laser operated at a wavelength of 1064 nm. The effect of laser power density and the working pressure on spectral lines generating by laser ablation, were detected by using optical spectroscopy. The electron density was measured using the Stark broadening of alumi...

Copper plasma is generated with the existence of an external magnetic field and without its presence utilizing Nd:YAG laser (1064 nm ,9 ns) in different pulse laser energy which ranges from(100 to 400) mJ in a vacuum. Plasma parameter beta) is least than 1, this indicates that the existence of magnetic field confinement effect is proven. Note that...

This is an Open Access Journal / article distributed under the terms of the Creative Commons Attribution License (CC BY-NC-ND 3.0) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. All rights reserved. The optical emission spectroscopy from laser induced Al and Fe plasmas gen...

This is an Open Access Journal / article distributed under the terms of the Creative Commons Attribution License (CC BY-NC-ND 3.0) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. All rights reserved. Laser-induced breakdown spectroscopy of Cu plasma in the presence and abse...

Experimental study on the effect of cylindrical hollow cathode, working pressure and magnetic field on spatial glow distribution and the characteristics of plasma produced by dc discharge in Argon gas, were investigated by image analyses for the plume within the plasma. It was found that the emission intensity appears as a periodic structure with m...

Hollow Cathode System

الجائزة الفضية في المعرض الدولي العاشرة في الشرق الاوسط المقام بالكويت

Laser-induced breakdown spectroscopy of CuO plasma in the presence and absence of magnetic field has been investigated. The plasma was generated by employing Nd: YAG laser (532 nm, 9 ns) at various pulse laser energy ranging from 100 to 400 mj in a vacuum. The increasing of pulse laser energy in the presence and absence of the magnetic field h...

In the present work, the effect of isolated dust particles (FeO) with radius of the grain 0.1μm-0.5μm of main plasma characteristics are investigated experimentally in direct current system by using magnetic field. The present of dust particle in the air plasma did effect on Paschen minimum and on the plasma properties in low pressure region. The e...

In this research non-thermal atmospheric pressure plasma jet, NAPP system has been build for the purpose of teeth bleaching. Extract teeth and dealt outside the mouth were used for the teeth bleaching process. These teeth were classified before and after plasma treatment for different time (3, 5, 10, and15minwith gas flow rate 5 and 2.5ℓ/min)by sha...

In this research non-thermal atmospheric pressure plasma jet, NAPP system has been build for the purpose of teeth bleaching. Extract teeth and dealt outside the mouth were used for the teeth bleaching process. These teeth were classified before and after plasma treatment for different time (3, 5, 10, and15minwith gas flow rate 5 and 2.5ℓ/min)by sha...

Key words In the present work, the effect of size of zinc dust particles on AC argon discharge characteristics are investigated experimentally. The plasma characteristics are determined by using optical emission spectroscopy (OES) techniques. The results illustrated that the electron temperature (T e) in the present and absent of Zinc dust particle...

In this work the development of a non-equilibrium atmospheric pressure plasma torch by use of two electrodes configuration, the linear-field configuration and cross–filed configuration. Where the experimental set up is based on very simple and low cost electric components, and generates an electrical field sufficiently high at the electrodes to ion...

In this work the development of a non-equilibrium atmospheric pressure plasma torch by use of two electrodes configuration, the linear-field configuration and cross–filed configuration. Where the experimental set up is based on very simple and low cost electric components, and generates an electrical field sufficiently high at the electrodes to ion...

The gas discharge–dust particle interaction for a dc discharge in air with micron-sized particles is investigated. The work present illustrated the effect of AL dust particle on current and voltage of discharge and on the radial profile of plasma parameters in the cathode sheath in direct current system. The results shows, the present of dust insid...

The gas discharge–dust particle interaction for a dc discharge in air with micron-sized particles is investigated. The work present illustrated the effect of AL dust particle on current and voltage of discharge and on the radial profile of plasma parameters in the cathode sheath in direct current system. The results shows, the present of dust insid...

In present work, a computer simulation was done to study the pre-breakdown phenomenon across an air gaps within rode-plane configuration. The mechanism of breakdown is based on the development of thin, weakly ionized channels called streamers. The simulation based on the stochastic model for the streamer time evolution between the two electrodes of...

In this paper, we studied the spark corona discharge in tap and distillited waters. The results show the shape of cone that generated on the tip of capillary tube is different with conductivity of liquids. The blue glow appears at the end of capillary tube and the drop extends into a cone. In addition, the conducitivity is affected on the relations...

Abstract: The modified Bohm diffusion equation is studied in the inner region of plasma column in Q-machine. The instability factor (C-factor) and modified Bohm diffusion efficient are calculated in that region of plasma column. The results are compared with those calculated according to Bohm equation and with experimental results. The comparis...

In this work, the formation of pulse corona discharge in the liquids was studied. The test liquids were alcohol, tap water, and distilled water. The photographs of the results show that the shape of the cone generated at the tip of the capillary tube is different with conductivity of liquids. The blue glow appears at the end of the capillary tube a...

Keywords Cylindrical magnetron D.C.sputtering process Article info

A dc cylindrical magnetron sputtering system is designed and fabricated. the chamber of this system consists of two coaxial copper cylinders used as cathode (inner one) and anode (outer one). the diameter of the outer and inner cylinders is 9.8 cm and 1.9 cm, respectively and it is of 22 cm height. A suitable solenoid magnetic coil, which has 1010...

Keywords cylindrical Magnetron sputtering. D C sputtering, abnormal glow discharge.

In this research used the D.C. planar magnetron sputtering and measurement the some parameter to magnetron sputtering to effect to deposition thin film; this parameters were the pressure, voltage the glow discharge, distance between the target and the substrate, and thickness for thin film. We found the best conditions in the pressure (300mtorr) an...

the anomalous diffusion has been previously observed in the inner region of plasma column in Q-machine. it is believed that the instability process (namely drift wave instability)which occurred in the plasma is responsible of this anomalous behavior. in this work, we study the instability factors (which affect the diffusion) in more details, and th...