**Commenced**in January 2007

**Frequency:**Monthly

**Edition:**International

**Paper Count:**250

# Search results for: Electron Plasma Waves

##### 250 Instability of Electron Plasma Waves in an Electron-Hole Bounded Quantum Dusty Plasma

**Authors:**
Basudev Ghosh,
Sailendranath Paul,
Sreyasi Banerjee

**Abstract:**

Using quantum hydrodynamical (QHD) model the linear dispersion relation for the electron plasma waves propagating in a cylindrical waveguide filled with a dense plasma containing streaming electron, hole and stationary charged dust particles has been derived. It is shown that the effect of finite boundary and stream velocity of electrons and holes make some of the possible modes of propagation linearly unstable. The growth rate of this instability is shown to depend significantly on different plasma parameters.

**Keywords:**
Electron Plasma wave,
Quantum plasma,
Quantum Hydrodynamical model.

##### 249 Nonlinear Solitary Structures of Electron Plasma Waves in a Finite Temperature Quantum Plasma

**Authors:**
Swarniv Chandra,
Basudev Ghosh

**Abstract:**

**Keywords:**
Electron Plasma Waves,
Finite Temperature Model,
Modulational Instability,
Quantum Plasma,
Solitary structure

##### 248 Propagation of Electron-Acoustic Solitary Waves in Weakly Relativistically Degenerate Fermi Plasma

**Authors:**
Swarniv Chandra,
Basudev Ghosh,
S. N. Paul

**Abstract:**

**Keywords:**
Relativistic Degeneracy,
Electron-Acoustic Waves,
Quantum Plasma,
KdV Equation.

##### 247 Modulational Instability of Electron Plasma Waves in Finite Temperature Quantum Plasma

**Authors:**
Swarniv Chandra,
Basudev Ghosh

**Abstract:**

Using the quantum hydrodynamic (QHD) model for quantum plasma at finite temperature the modulational instability of electron plasma waves is investigated by deriving a nonlinear Schrodinger equation. It was found that the electron degeneracy parameter significantly affects the linear and nonlinear properties of electron plasma waves in quantum plasma.

**Keywords:**
Amplitude Modulation,
Electron Plasma Waves,
Finite Temperature Model,
Modulational Instability,
Quantum
Plasma.

##### 246 Nonlinear Slow Shear Alfven Waves in Electron- Positron-Ion Plasma Including Full Ion Dynamics

**Authors:**
B. Ghosh,
H. Sahoo,
K. K. Mondal

**Abstract:**

**Keywords:**
Alfven waves,
Sagdeev potential,
Solitary waves.

##### 245 Arbitrary Amplitude Ion-Acoustic Solitary Waves in Electron-Ion-Positron Plasma with Nonthermal Electrons

**Authors:**
Basudev Ghosh,
Sreyasi Banerjee

**Abstract:**

Using pseudo potential method arbitrary amplitude ion-acoustic solitary waves have been theoretically studied in a collisionless plasma consisting of warm drifting positive ions, Boltzmann positrons and nonthermal electrons. Ion-acoustic solitary wave solutions have been obtained and the dependence of the solitary wave profile on different plasma parameters has been studied numerically. Lower and higher order compressive and rarefactive solitary waves are observed in presence of positrons, nonthermal electrons, ion drift velocity and finite ion temperature. Inclusion of higher order nonlinearity is shown to have significant correction to the solitary wave profile for the same values of plasma parameters.

**Keywords:**
Ion-acoustic waves,
Nonthermal electrons,
Sagdeev potential,
Solitary waves.

##### 244 Nonlinear Propagation of Acoustic Soliton Waves in Dense Quantum Electron-Positron Magnetoplasma

**Authors:**
A. Abdikian

**Abstract:**

**Keywords:**
Bifurcation theory,
magnetized electron-positron plasma,
phase portrait,
the Zakharov-Kuznetsov equation.

##### 243 Quantum Ion Acoustic Solitary and Shock Waves in Dissipative Warm Plasma with Fermi Electron and Positron

**Authors:**
Hamid Reza Pakzad

**Abstract:**

**Keywords:**
Ion acoustic shock waves; Quantum plasmas

##### 242 Spectroscopic Characterization of Indium-Tin Laser Ablated Plasma

**Abstract:**

**Keywords:**
Indium – Tin plasma,
laser ablation,
optical emission
spectroscopy,
electron temperature,
and electron number density.

##### 241 Propagation of Nonlinear Surface Waves in Relativistically Degenerate Quantum Plasma Half-Space

**Authors:**
Swarniv Chandra,
Parthasona Maji,
Basudev Ghosh

**Abstract:**

The nonlinear self-interaction of an electrostatic surface wave on a semibounded quantum plasma with relativistic degeneracy is investigated by using quantum hydrodynamic (QHD) model and the Poisson’s equation with appropriate boundary conditions. It is shown that a part of the second harmonic generated through self-interaction does not have a true surface wave character but propagates obliquely away from the plasma-vacuum interface into the bulk of plasma.

**Keywords:**
Harmonic Generation,
Quantum Plasma,
Quantum Hydrodynamic Model,
Relativistic Degeneracy,
Surface waves.

##### 240 Nonplanar Ion-acoustic Waves in a Relativistically Degenerate Quantum Plasma

**Authors:**
Swarniv Chandra,
Sibarjun Das,
Agniv Chandra,
Basudev Ghosh,
Apratim Jash

**Abstract:**

**Keywords:**
Kadomtsev-Petviashvili equation,
Ion-acoustic
Waves,
Relativistic Degeneracy,
Quantum Plasma,
Quantum
Hydrodynamic Model.

##### 239 Rarefactive and Compressive Solitary Waves in Warm Plasma with Positrons and Nonthermal Electrons

**Authors:**
Hamid Reza Pakzad

**Abstract:**

**Keywords:**
Ion acoustic waves,
Solitons,
Nonlinear phenomena,
Sagdeev potential

##### 238 Ion- Acoustic Solitary Waves in a Self- Gravitating Dusty Plasma Having Two-Temperature Electrons

**Authors:**
S.N.Paul,
G.Pakira,
B.Paul,
B.Ghosh

**Abstract:**

**Keywords:**
Charge fluctuations,
gravitating dusty plasma,
Ionacoustic
solitary wave,
Two-temperature electrons

##### 237 Reflection of Plane Waves at Free Surface of an Initially Stressed Dissipative Medium

**Authors:**
M. M. Selim

**Abstract:**

The paper discuses the effect of initial stresses on the reflection coefficients of plane waves in a dissipative medium. Basic governing equations are formulated in context of Biot's incremental deformation theory. These governing equations are solved analytically to obtain the dimensional phase velocities of plane waves propagating in plane of symmetry. Closed-form expressions for the reflection coefficients of P and SV waves- incident at the free surface of an initially stressed dissipative medium are obtained. Numerical computations, using these expressions, are carried out for a particular model. Computations made with the results predicted in presence and absence of the initial stresses and the results have been shown graphically. The study shows that the presence of compressive initial stresses increases the velocity of longitudinal wave (P-wave) but diminishes that of transverse wave (SV-wave). Also the numerical results presented indicate that initial stresses and dissipation might affect the reflection coefficients significantly.

**Keywords:**
Dissipation medium,
initial stress,
longitudinal waves,
reflection coefficients,
reflection of plane waves,
transverse waves.

##### 236 Nonlinear Modelling of Sloshing Waves and Solitary Waves in Shallow Basins

**Authors:**
Mohammad R. Jalali,
Mohammad M. Jalali

**Abstract:**

The earliest theories of sloshing waves and solitary waves based on potential theory idealisations and irrotational flow have been extended to be applicable to more realistic domains. To this end, the computational fluid dynamics (CFD) methods are widely used. Three-dimensional CFD methods such as Navier-Stokes solvers with volume of fluid treatment of the free surface and Navier-Stokes solvers with mappings of the free surface inherently impose high computational expense; therefore, considerable effort has gone into developing depth-averaged approaches. Examples of such approaches include Green–Naghdi (GN) equations. In Cartesian system, GN velocity profile depends on horizontal directions, *x-*direction and *y-*direction. The effect of vertical direction (*z-*direction) is also taken into consideration by applying weighting function in approximation. GN theory considers the effect of vertical acceleration and the consequent non-hydrostatic pressure. Moreover, in GN theory, the flow is rotational. The present study illustrates the application of GN equations to propagation of sloshing waves and solitary waves. For this purpose, GN equations solver is verified for the benchmark tests of Gaussian hump sloshing and solitary wave propagation in shallow basins. Analysis of the free surface sloshing of even harmonic components of an initial Gaussian hump demonstrates that the GN model gives predictions in satisfactory agreement with the linear analytical solutions. Discrepancies between the GN predictions and the linear analytical solutions arise from the effect of wave nonlinearities arising from the wave amplitude itself and wave-wave interactions. Numerically predicted solitary wave propagation indicates that the GN model produces simulations in good agreement with the analytical solution of the linearised wave theory. Comparison between the GN model numerical prediction and the result from perturbation analysis confirms that nonlinear interaction between solitary wave and a solid wall is satisfactorilly modelled. Moreover, solitary wave propagation at an angle to the *x*-axis and the interaction of solitary waves with each other are conducted to validate the developed model.

**Keywords:**
Even harmonic components of sloshing waves,
Green–Naghdi equations,
nonlinearity,
solitary waves.

##### 235 Investigation of Stoneley Waves in Multilayered Plates

**Authors:**
Bing Li,
Tong Lu,
Lei Qiang

**Abstract:**

Stoneley waves are interface waves that propagate at the interface between two solid media. In this study, the dispersion characteristics and wave structures of Stoneley waves in elastic multilayered plates are displayed and investigated. With a perspective of bulk wave, a reasonable assumption of the potential function forms of the expansion wave and shear wave in *n*th layer medium is adopted, and the characteristic equation of Stoneley waves in a three-layered plate is given in a determinant form. The dispersion curves and wave structures are solved and presented in both numerical and simulation results. It is observed that two Stoneley wave modes exist in a three-layered plate, that conspicuous dispersion occurs on low frequency band, that the velocity of each Stoneley wave mode approaches the corresponding Stoneley wave velocity at interface between two half infinite spaces. The wave structures reveal that the in-plane displacement of Stoneley waves are relatively high at interfaces, which shows great potential for interface defects detection.

**Keywords:**
Characteristic equation,
interface waves,
dispersion curves,
potential function,
Stoneley waves,
wave structures.

##### 234 Plasma Properties Effect on Fluorescent Tube Plasma Antenna Performance

**Authors:**
A. N. Dagang,
E. I. Ismail,
Z. Zakaria

**Abstract:**

This paper presents the analysis on the performance of monopole antenna with fluorescent tubes. In this research, the simulation and experimental approach is conducted. The fluorescent tube with different length and size is designed using Computer Simulation Technology (CST) software and the characteristics of antenna parameter are simulated throughout the software. CST was used to simulate antenna parameters such as return loss, resonant frequency, gain and directivity. Vector Network Analyzer (VNA) was used to measure the return loss of plasma antenna in order to validate the simulation results. In the simulation and experiment, the supply frequency is set starting from 1 GHz to 10 GHz. The results show that the return loss of plasma antenna changes when size of fluorescent tubes is varied, correspond to the different plasma properties. It shows that different values of plasma properties such as plasma frequency and collision frequency gives difference result of return loss, gain and directivity. For the gain, the values range from 2.14 dB to 2.36 dB. The return loss of plasma antenna offers higher value range from -22.187 dB to -32.903 dB. The higher the values of plasma frequency and collision frequency, the higher return loss can be obtained. The values obtained are comparative to the conventional type of metal antenna.

**Keywords:**
Plasma antenna,
fluorescent tube,
computer simulation technology,
plasma parameters.

##### 233 Effect of Pre-Plasma Potential on Laser Ion Acceleration

**Authors:**
Djemai Bara,
Mohamed Faouzi Mahboub,
Djamila Bennaceur-Doumaz

**Abstract:**

**Keywords:**
Cairns-Gurevich Equation,
ion acceleration,
plasma expansion,
pre-plasma.

##### 232 Deformation of Water Waves by Geometric Transitions with Power Law Function Distribution

**Authors:**
E. G. Bautista,
J. M. Reyes,
O. Bautista,
J. C. Arcos

**Abstract:**

In this work, we analyze the deformation of surface waves in shallow flows conditions, propagating in a channel of slowly varying cross-section. Based on a singular perturbation technique, the main purpose is to predict the motion of waves by using a dimensionless formulation of the governing equations, considering that the longitudinal variation of the transversal section obey a power-law distribution. We show that the spatial distribution of the waves in the varying cross-section is a function of a kinematic parameter,κ , and two geometrical parameters εh and w ε . The above spatial behavior of the surface elevation is modeled by an ordinary differential equation. The use of single formulas to model the varying cross sections or transitions considered in this work can be a useful approximation to natural or artificial geometrical configurations.

**Keywords:**
Surface waves,
Asymptotic solution,
Power law
function,
Non-dispersive waves.

##### 231 Spurious Crests in Second-Order Waves

**Authors:**
M. A. Tayfun

**Abstract:**

**Keywords:**
Large waves,
non-linear effects,
simulation,
spectra,
spurious crests,
Stokes waves,
wave breaking,
wave statistics.

##### 230 Water Vapor Plasma Torch: Design, Characteristics and Applications

**Authors:**
A. Tamošiūnas,
P. Valatkevičius,
V. Grigaitiene,
V. Valinčius

**Abstract:**

**Keywords:**
Arc discharge,
atmospheric pressure thermal plasma,
plasma torch,
water vapor.

##### 229 EEG Waves Classifier using Wavelet Transform and Fourier Transform

**Authors:**
Maan M. Shaker

**Abstract:**

**Keywords:**
Bioinformatics,
DWT,
EEG waves,
FFT.

##### 228 Plasma Arc Burner for Pulverized Coal Combustion

**Authors:**
Gela Gelashvili,
David Gelenidze,
Sulkhan Nanobashvili,
Irakli Nanobashvili,
George Tavkhelidze,
Tsiuri Sitchinava

**Abstract:**

**Keywords:**
Coal combustion,
plasma arc,
plasma torches,
pulverized coal.

##### 227 Influence of Axial Magnetic Field on the Electrical Breakdown and Secondary Electron Emission in Plane-Parallel Plasma Discharge

**Authors:**
Sabah I. Wais,
Raghad Y. Mohammed,
Sedki O. Yousif

**Abstract:**

**Keywords:**
Paschen curve,
Townsend coefficient,
Secondaryelectron emission,
Magnetic field,
Minimum breakdown voltage.

##### 226 Lamb Waves in Plates Subjected to Uniaxial Stresses

**Authors:**
Munawwar Mohabuth,
Andrei Kotousov,
Ching-Tai Ng

**Abstract:**

**Keywords:**
Acoustoelasticity,
dispersion,
finite deformation,
lamb waves.

##### 225 Feasibility of Leukemia Cancer Treatment (K562) by Atmospheric Pressure Plasma Jet

**Authors:**
Mashayekh Amir Shahriar,
Akhlaghi Morteza,
Rajaee Hajar,
Khani Mohammad Reza,
Shokri Babak

**Abstract:**

A new and novel approach in medicine is the use of cold plasma for various applications such as sterilization blood coagulation and cancer cell treatment. In this paper a pin-to-hole plasma jet suitable for biological applications is investigated and characterized and the possibility and feasibility of cancer cell treatment is evaluated. The characterization includes power consumption via Lissajous method, thermal behavior of plasma using Infra-red camera as a novel method, Optical Emission Spectroscopy (OES) to determine the species that are generated. Treatment of leukemia cancer cells is also implemented and MTT assay is used to evaluate viability.

**Keywords:**
Atmospheric Pressure Plasma Jet (APPJ),
Plasma
Medicine,
Cancer cell treatment,
leukemia.

##### 224 Amplification of Compression Waves in Clean and Bubbly Liquid

**Authors:**
Robert I. Nigmatulin,
Raisa Kh. Bolotnova,
Nailya K. Vakhitova,
Andrey S. Topolnikov,
Svetlana I. Konovalova,
Nikolai A. Makhota

**Abstract:**

**Keywords:**
acoustics,
cavitation,
detonation,
shock waves

##### 223 Plasma Density Distribution in Asymmetric Geometry Capacitive Coupled Plasma Discharge System

**Authors:**
Yinchang Du,
Yangfang Li

**Abstract:**

**Keywords:**
Capacitive coupled discharge,
asymmetric discharge,
homogeneous plasma.

##### 222 Electron-Impact Excitation of Kr 5s, 5p Levels

**Authors:**
Alla A. Mityureva

**Abstract:**

**Keywords:**
Cross section,
electron excitation,
krypton,
regression

##### 221 The Search of Anomalous Higgs Boson Couplings at the Large Hadron Electron Collider and Future Circular Electron Hadron Collider

**Authors:**
Ilkay Turk Cakir,
Murat Altinli,
Zekeriya Uysal,
Abdulkadir Senol,
Olcay Bolukbasi Yalcinkaya,
Ali Yilmaz

**Abstract:**

**Keywords:**
Anomalous Couplings,
Effective Lagrangian,
Electron-Proton Colliders,
Higgs Boson.