Modelling of a nonequilibrium spherical electric discharge under higher modes of incident microwaves

The work deals with the modelling of a nonequilibrium spherical microwave discharge. An effect of the higher modes of the incident electromagnetic waves on the properties of the discharge plasma is investigated. Numerical experiments are carried out for the discharge in an argon at atmospheric pressure. Results are presented for the characteristics of the discharge plasma against the external parameters (the mode, frequency and power of the applied electromagnetic field and the size of the discharge chamber).


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...
Self-consistent treatment of gas heating in modeling of a coaxial DBD in atmospheric pressure CO2
Zhou, Chen; Yuan, Chengxun; Kudryavtsev, Anatoly; Yasar Katircioglu, T.; Rafatov, İsmail; Yao, Jingfeng (2023-01-01)
This work is devoted to the numerical study of characteristics of dielectric barrier discharge maintained in a coaxial reactor in atmospheric pressure CO2. The numerical model is based on the drift-diffusion theory of gas discharges, and takes into account the gas heating in a self-consistent manner. The effect of incorporating gas heating into the discharge properties, specifically, on CO2 decomposition, is investigated for wide range of amplitude and frequency of the applied voltage. Calculations revealed...
Investigation of structural, electronic, anisotropic elastic, and lattice dynamical properties of MAX phases borides: An Ab-initio study on hypothetical &ITM(2)AB&IT (M = &ITTi&IT, &ITZr&IT, & A = &ITAl&IT, &ITGa&IT, &ITIn&IT) compounds
SÜRÜCÜ, GÖKHAN (2018-01-01)
The structural, electronic, anisotropic elastic, and lattice dynamical properties of the M(2)AB (M = Ti, Zr, Hf; A = Al, Ga, In) compounds belong to the family of MAX phases have been investigated by accomplishing the first principles density functional theory (DFT) calculations with utilizing the generalized-gradient approximation (GGA). Structural parameters, formation enthalpies, and X-ray diffraction patterns have been calculated for all compounds. Electronic band structure and corresponding density of ...
Simulations on glow discharge: development and validation of one-dimensional kinetic model by particle in cell/monte carlo collision method
Tiryaki, Özgecan; Çakır, Serhat; Department of Physics (2019)
Numerical codes for glow discharge plasma simulations were developed by using Particle in Cell/Monte Carlo Collision (PIC/MCC) method. The model is one-dimensional in coordinate space and three-dimensional in velocity space (1d3v). A modification of Direct Simulation Monte Carlo (DSMC) method known as null-collision method was used for particle collisions. MPI and sub-cycling were used for speed up. The code was validated using benchmarks for capacitively coupled helium discharges and tested with three-dime...
Investigation of nonlinear oscillations in the gas discharge-semiconductor system: effect of different fluid modelling approaches
Yeşil, Cihan; Rafatov, İsmail; Department of Physics (2018)
The work deals with the study of nonlinear oscillations in a system, consisted of planar glow discharge layer, coupled to a high-ohmic semiconductor layer. The whole system is sandwiched between two planar electrodes, to which the DC voltage is applied. The discharge models are developed in Comsol Multiphysics (v5.2), and based on fluid description of plasma, with drift-diffusion approximation for charged particle fluxes. Numerical tests are carried out for the discharge in Nitrogen, with GaAs semiconductor la...
Citation Formats
İ. Rafatov and S. Çakır, “Modelling of a nonequilibrium spherical electric discharge under higher modes of incident microwaves,” PHYSICS LETTERS A, pp. 353–365, 2005, Accessed: 00, 2020. [Online]. Available: