On the numerical modelling of a dc driven glow discharge plasma

Rafatov, İsmail
Kudryavtsev, Aa
We developed and tested two dimensional (axial-symmetric) models of a dc glow discharge in low pressure argon gas using two approaches. First, assembling the model from the ”general form” COMSOL Multiphysics pde’s, and second, using COMSOL’s built-in ”Plasma Module”. Calculation results have been compared with those obtained from the CFD-ACE+ package. The discharge models are based on a fluid description of ions and excited neutral species with drift-diffusion approximation for the particle flux. The data for electron transport (diffusion coefficient and mobility) as well as the rates of electron-impact plasmachemical reactions are derived from solutions of Boltzmann equation for the electron energy distribution function and corresponding collision cross-sections. The self-consistent electric field is calculated using the Poisson equation.
30th International Conference on Phenomena in Ionized Gases (ICPIG), (28 Ağustos - 02 Eylül 2011)


Numerical investigation of a dc glow discharge in an argon gas: two-component plasma model
Kemaneci, Efe Hasan; Rafatov, İsmail; Department of Physics (2009)
This thesis deals with a one and two dimensional numerical modeling of a low-pressure DC glow discharge in argon gas. We develop two-component fluid model which uses the diffusion-drift theory for the gas discharge plasma and consists of continuity equations for electrons and ions, as well as Poisson equation for electric field. Numerical method is based on the control volume technique. Calculations are carried out in MATLAB environment. Computed results are compared with the classic theory of glow discharg...
On the profile of frequency dependent series resistance and surface states in Au/Bi4Ti3O12/SiO2/n-Si(MFIS) structures
Parlaktuerk, F.; Altindal, S.; Tataroglu, A.; Parlak, Mehmet; AGASİEV, AHMED (2008-01-01)
The frequency dependent capacitance-voltage (C-V) and conductance-voltage (G/omega-V) characteristics of the metal-ferroclectric-insulator-semiconductor (Au/Bi4Ti3O12/SiO2/n-Si) structures (MFIS) were investigated by considering series resistance (R-s) and surface state effects in the frequency range of 1 kHz-5 MHz. The experimental C-V-f and G/omega-V-f characteristics of MFIS structures show fairly large frequency dispersion especially at low frequencies due to R-s and N-ss. In addition, the high frequenc...
Numerical investigation of dbd in neon:effect of fluid modelling approaches
Somay, Mehmet Hilmi; Rafatov, İsmail; Department of Physics (2021-2-11)
The study deals with numerical modelling of dielectric barrier discharge (DBD) in Neon gas. The DBD models are based on the drift-diffusion theory of gas discharges. Two different approaches, namely, the so called simple and extended fluid models, are followed. Within the simple fluid model, the ionization rate is approximated by the Townsend formula as a function of the local electric field. In the framework of the extended fluid model, the electron transport (mobility and diffusion) coefficients as well a...
Modelling of non-uniform DC driven glow discharge in argon gas
Rafatov, İsmail; BILIKMEN, S. (Elsevier BV, 2007-07-16)
Physical properties of non-uniform DC-driven glow discharge in argon at pressure 1 torr are analyzed numerically. Spatially two-dimensional axial-symmetric model is based on the diffusion-drift theory of gas discharge. Results presented compare favorably with the classic theory of glow discharges and exhibit good agreement with the experimental result. Comparison with the result of spatially one-dimensional model is performed. (c) 2007 Elsevier B.V. All fights reserved.
Observed nonlinearities in a DC semiconductor-gas discharge system
ÇAYLI, YAVUZ KERİM; MANSUROĞLU, DOĞAN; Uzun Kaymak, İlker Ümit (Canadian Science Publishing, 2018-07-01)
Nonlinear behaviour of a direct current (DC) driven semiconductor-gas discharge plasma is investigated experimentally. The setup consists of two planar electrodes separated by a gap of 1 mm. Plasma glow is generated between a semiconductor cathode and a transparent anode using nitrogen gas at partial atmospheric pressure. Nonlinear behavior of the discharge is investigated by varying the applied DC voltage while monitoring the plasma current (I), voltage (V), and the optical emission, (i.e., amplified volta...
Citation Formats
İ. Rafatov and A. Kudryavtsev, “On the numerical modelling of a dc driven glow discharge plasma,” presented at the 30th International Conference on Phenomena in Ionized Gases (ICPIG), (28 Ağustos - 02 Eylül 2011), Belfast, İngiltere, 2012, Accessed: 00, 2021. [Online]. Available: http://mpserver.pst.qub.ac.uk/sites/icpig2011/435_B5_Rafatov.pdf.