The Boltzmann transport equation is used to calculate the electron energy distribution function (EEDF) and the transport coefficient in pure sulfur hexafluoride (SF6) and pure Carbon dioxide (CO2) and their mixtures. The electron swarm parameters are evaluated in the range of ( 16 15 5 10 / 9 10     E N   ) V.cm2. These parameters namely are: The Diffusion coefficient of electrons and mean electron energy. The motion of electrons in plasma gas (SF6) and mixing it with (CO2) under an applied uniform electric field is simulated by using the numerical solution of Boltzmann's transport equation technique. The numerical solutions are utilized within the international computer code kinema-Elendif and written in Fortran 77 language software. The calculated distribution function is found to be remarked non-Maxwillian that has energy variations which reflect the import electron-molecule energy exchange processes.

When a high voltage is applied to electrodes immersed in a gas such as oxygen to provide a strongly non-uniform electric field, charged species such as free electrons, positive and negative ions can be generated in the gas due to corona discharge. These charged particles will drift from one electrode to another and will collected at the ends under the influence of external electric field. The accumulated surface charges alter the electric field distribution in the entire system. Charge build-up is an inherent phenomenon in DC applications and is essential in variable voltages when the size of the air gap is small.

When the plasma is unable to provide the positive anode sheath with ions (small anode, low anode plasma conductivity, ablating anode), the ions must be generated inside the sheath itself. The Poisson equation for the sheath with ion generation is solved. The ion flux from the sheath to the neutral plasma is obtained as a function of the anode voltage drop. It is shown that in the case of highly intensive ion generation, the mode with monotonous potential ceases to exist. It is hypothesized that a double layer is formed. It is suggested that the analysis could be applicable to the anode layer of a glow discharge.

In the current study, a numerical modeling was used to investigate the physical properties of corona discharges in a system of concentric cylindrical electrodes, in which oxygen fills the space between the electrodes at standard conditions using the COMSOL software. The inner axial electrode diameter was selected (0.2 mm), while the outer cylinder diameter was (15mm) and a voltage of 7 kV was applied to the axial electrode fed through a charging circuit composed of RC. The study showed that during the time of the voltage rise from zero to the maximum value, an electric current will be generated at the cathode resulting from the positive ions and a current at the ground electrode resulting from the negative ions and electrons. During the time of the rise of the current, the spatial distribution of the three main charged particles (electrons, positive and negative ions) was studied, in addition to the distribution of the electric field and the intensity of the ozone generated.