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Articles 241 - 270 of 1374
Full-Text Articles in Physical Sciences and Mathematics
Forward-Backward Asymmetry Of Drell-Yan Lepton Pairs At 14 Tev Center-Of-Mass Energy, Kamuran Di̇lsi̇z, Hasan Oğul
Forward-Backward Asymmetry Of Drell-Yan Lepton Pairs At 14 Tev Center-Of-Mass Energy, Kamuran Di̇lsi̇z, Hasan Oğul
Turkish Journal of Physics
In this paper, fiducial cross-sections of lepton pairs with opposite charge via Z → l+ l- (l± = μ±, e±) are calculated at a center-of-mass energy of 14 TeV by applying different transverse momentum selections to evaluate their impact on the production cross-section as well as the differential cross-section of Z bosons in terms of lepton pseudorapidity. The predictions are computed by next-to-next-to-leading order quantum chromodynamics including next-to-leading order electroweak corrections. Forward-backward asymmetry prediction for the Drell?Yan production in proton-proton collision is further calculated at 14 TeV using HERAPDF2.0, MMHT2014, NNPDF3.1, and CT14 parton distribution function models. Then 14 TeV …
Investigation Of The Optical Properties Of The Liquid Crystal-Based Devices Via Mueller Matrix Formalism, Ömer Polat
Investigation Of The Optical Properties Of The Liquid Crystal-Based Devices Via Mueller Matrix Formalism, Ömer Polat
Turkish Journal of Physics
A model approach for the Mueller matrix (MM) of the twisted nematic liquid crystal spatial light modulator (TNLC-SLM) was proposed. In the first part of the study, the MM of the TNLC cell in the absence of applied voltage was investigated both theoretically and experimentally. In the second part, the model approach was improved by considering the reorientation of both tilt and azimuth angles of the liquid crystal (LC) molecules in the presence of applied voltage. Comparison of the theoretical MM elements with the experimental ones from the literature showed that, instead of decaying exponentially, the azimuth angle rotates with …
Lattice Calculations For Two-Component Fermion Systems With Unequal Masses: Onedimension, Serdar Elhatisari
Lattice Calculations For Two-Component Fermion Systems With Unequal Masses: Onedimension, Serdar Elhatisari
Turkish Journal of Physics
We consider systems of two-component fermions with unequal masses and interacting via a short-range attractive potential. We discuss the case where the two-component fermions form a shallow dimer with large scattering length. The three-fermion and four-fermion systems with such properties are universal and characterized by the twofermion scattering length aff and the ratio of the mass of spin-↑ fermion to the mass of spin-↓ fermion, m↑/m↓. In this study, using lattice effective field theory, we analyze fermion-dimer and dimer-dimer systems and calculate the universal fermion-dimer and dimer-dimer scattering lengths for various values of the mass ratio m↑/m↓. We find that …
Isotopic Distribution In Projectile Fragments Above The Coulomb Barrier, Ayşegül Kaya, Ni̇hal Büyükçi̇zmeci̇, Riza Oğul
Isotopic Distribution In Projectile Fragments Above The Coulomb Barrier, Ayşegül Kaya, Ni̇hal Büyükçi̇zmeci̇, Riza Oğul
Turkish Journal of Physics
We have studied fragmentation properties of projectiles in peripheral heavy-ion collisions within a statistical ensemble approach. Distributions of projectile fragments are calculated for the reaction systems 86Kr on 58;64Ni and are compared to the experimental data for the same reactions at projectile energy of 15 MeV/nucleon. We assume that the projectile nuclei capture many neutrons from the targets as a result of the multinucleon transfer reactions (direct and fast reactions) at the first step of the dynamical stage of the collisions, and then the excited spectators are formed during the preequilibrium process (multistep reactions) long before the statistical equilibrium stage, …
Modeling Of A Sessile Droplet With The Curvature Dependence Of Surface Tension, Sergo Rekhviashvili, Aslan Sokurov
Modeling Of A Sessile Droplet With The Curvature Dependence Of Surface Tension, Sergo Rekhviashvili, Aslan Sokurov
Turkish Journal of Physics
In this paper, using the Gibbs dividing surface method, the formula that determines the curvature-dependent surface tension in a system with two phases is deduced. The well-known Tolman formula is a special case for this formula. The problem of a sessile droplet is considered. The Bashforth-Adams equation analogue in view of the curvaturedependent surface tension is obtained and the numerical solution of the equation is carried out. We show that if the droplet size is not so large compared to the thickness of the surface layer (micro- or nanodroplets), the dependence of the surface tension on the curvature is very …
A Phenomenological Calculation For W+W- Diboson Production For The Largehadron Collider And Future Circular Collider, Kamuran Di̇lsi̇z, Hasan Oğul
A Phenomenological Calculation For W+W- Diboson Production For The Largehadron Collider And Future Circular Collider, Kamuran Di̇lsi̇z, Hasan Oğul
Turkish Journal of Physics
The Large Hadron Collider (LHC) at CERN has been designed to collide beams of protons at 7, 8, 13, and 14 TeV center-of-mass energies and a new hadron collider called the Future Circular Collider (FCC), which is larger and more energetic than the LHC, is being planned for the near future. The maximum planned energy for FCC is 100 TeV center-of-mass energy. In this regard, we present the leading order and next-to-leading order cross-section predictions of two simultaneously produced opposite-sign W bosons at 7, 8, 13, 14, and 100 TeV center-of-mass energies by using the MCFM MC generator. The results …
On Oxygen-Rich Sr Variables In The Solar Neighborhood, Tuncay Özdemi̇r
On Oxygen-Rich Sr Variables In The Solar Neighborhood, Tuncay Özdemi̇r
Turkish Journal of Physics
Brightness distribution of variable stars was investigated based on good Hipparcos parallaxes of semiregular variables (SRVs) in the solar neighborhood, and it is shown that the order of the variability types Lb, SR, SRb, SRa, and Mira is, statistically, an order of increasing brightness along the red giant branch and asymptotic giant branch. In addition, it is also shown that the majority of Miras are above and majority of SRVs are below the tip of the red giant branch. The periods of SRVs that fall in Wood's sequence C (fundamental mode) of large Magellanic clouds were identified. Statistically, the order …
Characterizing Decaying Dark Matter: X-Ray Emission From Sterile Neutrinos, Murat Hüdaverdi̇
Characterizing Decaying Dark Matter: X-Ray Emission From Sterile Neutrinos, Murat Hüdaverdi̇
Turkish Journal of Physics
Recently, an unknown emission line at E $\sim$3.5 keV from several astrophysical objects has been detected. The line is suggested to be originating from decaying dark matter particles. The results have drawn great attention from the astrophysics and particle physics community. Since the detected line is significantly weak there has also been a long debate over the origin of this mysterious signal. The most accepted scenario is a radiatively decaying sterile neutrino of 7.1 keV in mass producing a monochromatic 3.5 keV line, which is observable in X-ray energy ranges. The problem has not been settled and further observations from …
Design Of A Multifunctional Sample Probe For Transport Measurements, Mustafa Öztürk, Numan Akdoğan
Design Of A Multifunctional Sample Probe For Transport Measurements, Mustafa Öztürk, Numan Akdoğan
Turkish Journal of Physics
Herein, we describe a multifunctional sample probe equipped with a two-axis goniometer for transport measurements. The two-axis goniometer enables both computer-controlled 360$^{\circ}$ out-of-plane and manual 360$^{\circ}$ in-plane rotations. The multifunctional sample probe was successfully implemented to a host dewar and an electromagnet system. The developed probe is capable of performing transport measurements while fully controlling the parameters such as the magnetic and electrical fields, the angle, the temperature, and the current/voltage parameters in a wide range. The design of the multifunctional sample probe allows easy installation into different dewar and magnet systems and connection of a wide range of external …
Dimension Of Quantum Mechanical Path, Chain Rule, And Extension Of Landau's Energy Straggling Method Using $F^\Alpha$-Calculus, Saleh Ashrafi, Ali Khalili Golmankhaneh
Dimension Of Quantum Mechanical Path, Chain Rule, And Extension Of Landau's Energy Straggling Method Using $F^\Alpha$-Calculus, Saleh Ashrafi, Ali Khalili Golmankhaneh
Turkish Journal of Physics
$F^\alpha$-calculus was recently presented for fractals. We show that the $F^\alpha$-derivative satisfies the chain rule and affirms that the dimension of a quantum mechanical path is two. $F^\alpha$-calculus allows us to extend quantum mechanics to fractal curves. To show the applicability of $F^\alpha$-calculus, we study the fractal model of a particle in a box. $F^\alpha$-calculus is suitable for describing the motion of particles with a fractal route through matter. In addition, we extend Landau's energy straggling method of charged particles to fractals.
Super Inflation Mechanism And Dark Energy From A Cosmological Entropy Perspective, Ali̇ İhsan Keski̇n
Super Inflation Mechanism And Dark Energy From A Cosmological Entropy Perspective, Ali̇ İhsan Keski̇n
Turkish Journal of Physics
Various approaches are developed that provide a unification of the early inflationary epoch of the universe and dark energy (cosmic accelerating expansion case). In one respect, we express this unification in a universal thermodynamic framework within the context of $F\left( T,T_{G} \right)$ gravity, where $T$ represents the torsion invariant and $T_{G}$ is the teleparallel equivalent of the Gauss--Bonnet term. For a Friedmann-Robertson-Walker universe model bounded by the dynamical apparent horizon, we explore the generalized second law of gravitational thermodynamics (GSLT). Finally, we discuss the super inflation mechanism, the deceleration case (radiation and dust regions), and the late time cosmic acceleration …
The Influence Of Deposit Composition Controlled By Changing The Relative Fe Ion Concentration On Properties Of Electroplated Nanocrystalline Co-Fe-Cu Ternary Thin Films, Umut Saraç, Mali̇k Kaya, Mevlana Celaletti̇n Baykul
The Influence Of Deposit Composition Controlled By Changing The Relative Fe Ion Concentration On Properties Of Electroplated Nanocrystalline Co-Fe-Cu Ternary Thin Films, Umut Saraç, Mali̇k Kaya, Mevlana Celaletti̇n Baykul
Turkish Journal of Physics
Ternary Co-Fe-Cu thin films with 78.5-92.4 at.% Co, 4.1-17.9 at.% Fe, and 3.1-3.6 at.% Cu were electroplated at ambient temperature from electrolytes with different relative Fe ion concentrations with respect to the Co ion concentration on the glass substrates coated with indium tin oxide (ITO). It was revealed that the Fe is more easily deposited than Co for all electrolyte conditions. The phase structure of the films changed from a mixture of hcp Co and fcc/hcp Co to a mixture of fcc/hcp Co and bcc Fe and the mean crystallite size diminished with increasing Fe content within the deposits. A …
Photon In A Cylindrical Resonant Cavity, Cavi̇t Teki̇nçay, Yusuf Sucu
Photon In A Cylindrical Resonant Cavity, Cavi̇t Teki̇nçay, Yusuf Sucu
Turkish Journal of Physics
In this study, the massless and massive spin-1 particle equations, derived from the excited states of the zitterbewegung model, are considered for the photon in the cylindrical resonant cavity background. The resonant frequencies of the particles are also obtained. We show that these frequencies become equivalent in the $M^{2}\to 0$ limit.
Quantum Many-Body Interactions In The Presence Of Disordered Potentials, Riza Oğul
Quantum Many-Body Interactions In The Presence Of Disordered Potentials, Riza Oğul
Turkish Journal of Physics
The time evolution of the quantum nonequilibrium states of many-body particles is described with a set of hierarchies of quantum kinetic equations with quantum wave functions. A collision term is obtained in terms of two-body interactions in the mean-field with a disordered potential, which is proposed for the first time. The implications and the limits of applicability of the resulting kinetic equations are discussed.
Spectral Properties Of The Galactic Supernova Remnant Vela Jr. (G266.2-1.2) Using Chandra, Nergi̇s Cesur, Aytap Sezer, Murat Hüdaverdi̇
Spectral Properties Of The Galactic Supernova Remnant Vela Jr. (G266.2-1.2) Using Chandra, Nergi̇s Cesur, Aytap Sezer, Murat Hüdaverdi̇
Turkish Journal of Physics
An X-ray nonthermal spectral investigation of the galactic shell-type supernova remnant (SNR) Vela Jr. using archival data from Chandra for the northern and northwestern rims of the SNR is presented. Spectra were extracted from four emission regions in these rims (three in the northwestern rim and one in the northern). The X-ray spectra of the northwestern rim were well reproduced by a single power-law and the synchrotron model srcut, and for the north rim, the spectra were fitted by a single and a broken power-law, respectively. The spectra of both rims show no line emission. Each spectrum was fit by …
Thermodynamics Of Cosmological Models With Generalized $G$ And $\Lambda $, M Saratchandra Singh, Sanasam Surendra Singh
Thermodynamics Of Cosmological Models With Generalized $G$ And $\Lambda $, M Saratchandra Singh, Sanasam Surendra Singh
Turkish Journal of Physics
Here we investigate spatially flat Friedmann-Robertson-Walker space-time models of the universe to study the thermodynamic behaviors in light of variables $G$ and $\Lambda $. A particular method to find the solutions of Einstein's field equations and mathematical expressions for temperature and entropy of the perfect fluid cosmological models is introduced by using both the equation of state and the assumption $G=G_{0} \,a^{n}$. It is observed that the phantom field of ($\omega
Monte Carlo Simulation Of Dynamic Phase Transition Properties Of Core-Shell Magnetic Nanoparticles With Similar Volumes, Erol Vatansever
Monte Carlo Simulation Of Dynamic Phase Transition Properties Of Core-Shell Magnetic Nanoparticles With Similar Volumes, Erol Vatansever
Turkish Journal of Physics
We implement Monte Carlo simulations to determine dynamic phase transition features of both cubical and spherical nanoparticles composed of spin-1/2 cores surrounded by a spin-1 shell layer. The particles are subjected to an oscillating magnetic field. We plan these particles such that they have similar volumes. It is observed that the nonequilibrium magnetic phase transition temperatures of the particles with similar volumes explicitly depend on their geometrical shapes as well as the system parameters. The cubic one has a higher transition temperature than the spherical one for the small interface coupling, whereas the transition temperature of the spherical particle becomes …
Density Functional Theory Of Cubic Zirconia And 6-15 Mol% Doped Yttria-Stabilized Zirconia: Structural And Mechanical Properties, Berna Akgenç, Tahi̇r Çağin
Density Functional Theory Of Cubic Zirconia And 6-15 Mol% Doped Yttria-Stabilized Zirconia: Structural And Mechanical Properties, Berna Akgenç, Tahi̇r Çağin
Turkish Journal of Physics
Results of ab-initio density-functional theory calculations within the generalized gradient approximation (GGA-PBE) of structural and mechanical properties of cubic zirconia and yttria-stabilized zirconia (YSZ) with yttria (Y$_{2}$O$_{3})$ concentrations of 6.67, 10.34, and 14.28 mol% are reported. It is found that the calculated structural and mechanical parameters of all considered structures are highly consistent with the existing experimental data and the other theoretical values. The doping concentration of yttria-stabilized zirconia has critical importance in ionic conductivity and stabilization of high temperature down to room temperature. The lattice parameter and cell volume linearly decrease with increases in doping concentration. Moreover, the effects …
Stephen Hawking - A Great Mind (8 January 1942 -- 14 March 2018), Mukhtar Ahmed Rana
Stephen Hawking - A Great Mind (8 January 1942 -- 14 March 2018), Mukhtar Ahmed Rana
Turkish Journal of Physics
Hawking induced a knowledge revolution in theoretical physics. His bedrock concepts and explanations reshaped modern physics.
Single Production Of The Excited Muons At The Sppc-Based Ultimate Μp Collider, Abdullati̇f Çalişkan
Single Production Of The Excited Muons At The Sppc-Based Ultimate Μp Collider, Abdullati̇f Çalişkan
Turkish Journal of Physics
Single production potential of the excited muons at the SPPC-based ultimate muon-proton collider with center-of-mass energy of 116.6 TeV was analyzed. We calculated the production cross-sections and the decay widths of the excited muons with the process of µp → µ*X → γµX. We obtained the normalized transverse momentum and pseudorapidity distributions of the final-state particles to attain the kinematical cuts for the discovery of the excited muons. With these cuts, we determined the mass limits. It was shown that the discovery limits on the mass of the excited muons are 19.6 and 10.1 TeV for λ = mµ* and …
Silicon Nitride As Antireflection Coating To Enhance The Conversion Efficiency Of Silicon Solar Cells, Rajinder Sharma
Silicon Nitride As Antireflection Coating To Enhance The Conversion Efficiency Of Silicon Solar Cells, Rajinder Sharma
Turkish Journal of Physics
The aim of this work is to investigate the effect of single and double layer antireflection coating (ARC) on the performance of silicon solar cells. In this regard, various previous works on single and double layer ARCs have been consulted. Silicon nitride (Si3N4) has been used as ARC material because of its varying refractive index (1.8-3.0). Numerical calculations have been performed to obtain the reflectance for single and double layer Si3N4 using the transfer matrix method. Double layer antireflection coating (DLARC) of Si3N4 is found to have significant advantages over single layer antireflection coating (SLARC). Calculated reflectances have been further …
An Experimental Study On The Angular Dependence Of Coherent To Compton Scattering Differential Cross-Section Ratios Of Calcium, Tuba Akkuş
Turkish Journal of Physics
The coherent to Compton scattering cross-section ratio of calcium was measured experimentally for several polar scattering angles (90°, 100°, 110°, 120°, and 130°) and azimuthal scattering angles (30°, 20°, 10°, 0°, -10°, and -20°). A high purity germanium semiconductor detector with a resolution of 199.6 eV at 5.9 keV was used. The theoretical values of the coherent to Compton scattering differential cross-section of calcium were calculated on the basis of nonrelativistic form factors, relativistic form factors, and S-matrix theories. It was observed that the experimental results were most compatible with the nonrelativistic form factor theory.
Information-Theoretic Measure Of The Hyperbolical Exponential-Type Potential, Atachegbe Clement Onate, Olukayode Adebimpe, Babatunde Olufemi Adebesin, Adewale Folaranmi Lukman
Information-Theoretic Measure Of The Hyperbolical Exponential-Type Potential, Atachegbe Clement Onate, Olukayode Adebimpe, Babatunde Olufemi Adebesin, Adewale Folaranmi Lukman
Turkish Journal of Physics
The approximate analytical solution of the 3-dimensional radial Schrödinger equation in the framework of the parametric Nikiforov-Uvarov method was obtained with a hyperbolical exponential-type potential. The energy eigenvalue equation and the corresponding wave function have been obtained explicitly. Using the integral method, we calculated Shannon entropy, information energy, Fisher information, and complexity measure. It was deduced that the complexity measure calculated using Shannon entropy with information energy and that calculated using Shannon entropy with Fisher information were similar.
Mapping Heavy Elements In The Supernova Remnant G290.1-0.8, Murat Hüdaverdi̇
Mapping Heavy Elements In The Supernova Remnant G290.1-0.8, Murat Hüdaverdi̇
Turkish Journal of Physics
We present the imaging and spectroscopic study results of G290.1-0.8 Supernova Remnant (SNR) using the Suzaku X-ray archival data. The SNR belongs to the mixed-morphology class with its centrally peaked asymmetric X-ray core and distorted radio shell-like plasma. The X-ray spectra is well defined with isothermal plasma of kTe ∼ 0:5 keV. The radial profile shows enhanced elemental abundances. The EW maps reveal inhomogeneous asymmetric spatial distribution of elemental abundances. The northeast of the SNR is bright in Ne, Mg, and Si. The EW maps are enhanced in the direction of the X-ray elongation, suggesting that the distorted X-ray structure …
Electrochemical Capacitance-Voltage Profiling Of Nonuniformly Doped Gaas Heterostructures With Sqws And Mqws For Led Applications, George Yakovlev, Vasily Zubkov, Anna Solomnikova, Oleg Derevianko
Electrochemical Capacitance-Voltage Profiling Of Nonuniformly Doped Gaas Heterostructures With Sqws And Mqws For Led Applications, George Yakovlev, Vasily Zubkov, Anna Solomnikova, Oleg Derevianko
Turkish Journal of Physics
Light-emitting heterostructures with single and multiple GaAs/InGaAs quantum wells have been investigated by means of electrochemical capacitance-voltage (ECV) profiling. Capacitance-voltage characteristics were measured; concentration profiles of free charge carriers over the heterostructure depth as well as the intensity of quantum well filling by charge carriers were obtained. In heterostructures with a single quantum well (QW), we considered limitations of capacitance techniques for undoped QW profiling, which are situated near the metallurgic border of the p-n junction. We made a detailed consideration of phenomena related to Debye smearing and we developed and analyzed the dependence of the space charge region width …
Effects Of Annealing Temperature On Electrical Characteristics Of Sputtered Al/Al2o3/P-Si (Mos) Capacitors, Şenol Kaya, Erhan Budak, Ercan Yilmaz
Effects Of Annealing Temperature On Electrical Characteristics Of Sputtered Al/Al2o3/P-Si (Mos) Capacitors, Şenol Kaya, Erhan Budak, Ercan Yilmaz
Turkish Journal of Physics
The aim of this study is to investigate annealing effects on the electrical characteristics of aluminum oxide (Al2O3) MOS capacitors. Chemical changes after annealing have been characterized using the Fourier transform infrared spectroscopy prior to detailed electrical investigation. The influence of annealing temperature on electrical characteristics has been investigated by capacitance-voltage (C-V) and conductance-voltage (G/ω-V) curves. Effective oxide trap density (Nox), border trap densities (N2bt), and interface trap densities (Nit) were calculated during the electrical analysis. Remarkable changes in the measurements were observed depending on the annealing temperatures. The obtained results demonstrate that the optimum annealing temperature is 450 °C …
Size Investigation Of Silicon Nanoclusters Deposited On Hopg Using Noncontact Atomic Force Microscopy, Mümi̇n Mehmet Koç
Size Investigation Of Silicon Nanoclusters Deposited On Hopg Using Noncontact Atomic Force Microscopy, Mümi̇n Mehmet Koç
Turkish Journal of Physics
The sizes of silicon nanoparticles produced using two different novel methods are investigated in this report. The method of production used to generate silicon oxide nanoparticles was achieved via gas aggregation codeposition with water on a cold target, and also via a liquid jet method. The nanoparticles were drop-cast on a highly oriented pyrolytic graphite (HOPG) substrate and assessed using ultrahigh vacuum atomic force microscopy (AFM). Noncontact constant force mode was used in the AFM investigations. The silicon nanoparticles produced using the gas aggregation and water codeposition method were found to be smaller than 2 nm. A degree of deviation …
Nature Of Entropy In A Scalar-Tensor Theory Of Gravity, Onur Siğinç, Mustafa Salti, Hi̇lmi̇ Yanar, Oktay Aydoğdu
Nature Of Entropy In A Scalar-Tensor Theory Of Gravity, Onur Siğinç, Mustafa Salti, Hi̇lmi̇ Yanar, Oktay Aydoğdu
Turkish Journal of Physics
This work is devoted to studying the generalized nature of the entropy function in a specific form of the scalar-tensor-vector (STeVe) theory of gravity for the Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime in the state of thermal equilibrium. For this purpose, we define an equilibrium picture of thermodynamics by making use of a suitable set of the dark energy density and dark pressure descriptions, which defines an energy-momentum tensor obeying the local energy conservation law. Furthermore, we also discuss our results numerically in order to get additional implications.
Lattice Modeling Of A Real Gas Revisited, Lisha Damodaran, Udayanandan Kandoth Murkoth
Lattice Modeling Of A Real Gas Revisited, Lisha Damodaran, Udayanandan Kandoth Murkoth
Turkish Journal of Physics
The spin-half Ising model has been used with remarkable success in describing magnetism and phase transition in magnetic materials. Likewise, the lattice gas model, which uses the spin-1 Ising model, was employed to investigate the phase transition in liquid-gas systems. In all the earlier lattice gas models, the kinetic energy of atoms occupying the various lattice sites were not considered for finding the equation of state. In this paper we use the Hamiltonian with kinetic energy and a modified equation of state is obtained. The isotherms of this model show the behavior of real gases at all pressures and they …
One-Dimensional Fluid And Hybrid Numerical Analysis Of The Plasma Properties Inthe Discharge Channel Of A Hall Thruster, Çinar Yüncüler, İsmai̇l Rafatov, Demet Uluşen Aksoy
One-Dimensional Fluid And Hybrid Numerical Analysis Of The Plasma Properties Inthe Discharge Channel Of A Hall Thruster, Çinar Yüncüler, İsmai̇l Rafatov, Demet Uluşen Aksoy
Turkish Journal of Physics
One-dimensional fluid and hybrid fluid-kinetic numerical codes are developed and applied to the analysis of axial distributions of plasma properties in the discharge channel of a Hall-effect thruster. Within the hybrid model ions are described by the kinetic Vlasov equation, while electrons and neutral atoms are treated as fluids. The results obtained from fluid and hybrid models are compared. Different operating regimes such as damped, periodic, and aperiodic irregular oscillations about the stationary state are observed and discussed. Thrust and efficiency of the thruster for different input parameters are estimated.