49 research outputs found
Ion-acoustic Double Layer in a Multicomponent Plasma with Two Types of Positive Ions and Two-temperature Isothermal Electrons
Get PDFUsing integral form of governing equations in terms of pseudo potential ion-acoustic double-layers have been investigated theoretically in a multicomponent plasma consisting of two types of cold positive ions and two- temperature isothermal electrons. The mathematical technique used here has advantage over other conventional methods to study higher order nonlinear and dispersive effects on double layer formation. Conditions are obtained for the existence of ion-acoustic double-layers in the studied plasma. The effects of temperature and density ratios of the two types of electrons and the ratio of masses of the two types of positive ions on the double-layer formation and structure are also investigated. They are shown to have significant effects on the excitation and structure of the double-layers. The importance of this investigation has also been pointed out
Basic plasma physics
No full textBasic Plasma Physics is designed to serve as an introductory compact textbook for advanced undergraduate, postgraduate and research students taking plasma physics as one of their subject of study for the first time. It covers the current syllabus of plasma physics offered by the most universities and technical institutions. The book requires no background in plasma physics but only elementary knowledge of basic physics and mathematics. Emphasis has been given on the analytical approach. Topics are developed from first principle so that the students can learn through self-study. One chapter has been devoted to describe some practical aspects of plasma physics. Each chapter contains a good number of solved and unsolved problems and a variety of review questions, mostly taken from recent examination papers. Some classroom experiments described in the book will surely help students as well as instructors
Torsion of a composite beam of rectangular cross-section consisting of isotropic media with interfaces parallel to one of the sides
Get PDFsummary:In this paper the torsion problem of a composite beam of rectangular cross-section composed of different isotropic media with interfaces parallel to one side is solved adopting a procedure based on the use of Green's function for a composite body and Fourier sine transform. An example of a composite beam formed of three media is considered and dependence of the position of occurrence of maximum stress on the ration of rigidity moduli is observed
Moisture Stresses in a Long Hollow Wood Pole of Constant Outer and Inner Radius in a State of Plane Strain
No full textMoisture stresses in a long hollow hygroscopic cylindrically aeolotropic circular cylinder in a state of plane strain are determined mathematically in infinite trigonometric series form. The analysis is then applied to find similar stresses in a long hollow wood pole made up of species walnut for a physically important moisture-content distribution. It is observed that the infinite sums representing the stresses converge and the stresses can be evaluated with the help of a digital computer up to any desired accuracy.</jats:p
Nonlinear Solitary Structures of Electron Plasma Waves in a Finite Temperature Quantum Plasma
No full textNonlinear solitary structures of electron plasma waves
have been investigated by using nonlinear quantum fluid equations for electrons with an arbitrary temperature. It is shown that the electron degeneracy parameter has significant effects on the linear and nonlinear properties of electron plasma waves. Depending on its
value both compressive and rarefactive solitons can be excited in the model plasma under consideration
Non-linear propagation of electrostatic waves in relativistic Fermi plasma with arbitrary temperature
No full text627-633Modulational instability of electron plasma waves has been investigated by using the quantum hydrodynamic (QHD) model for quantum plasma at finite temperature by deriving a non-linear Schrödinger equation including relativistic effects. It is shown that the electron degeneracy parameter and streaming velocity significantly affect the linear and non-linear properties of electron plasma waves in a finite temperature quantum plasma
Modulational Instability of Electron Plasma Waves in Finite Temperature Quantum Plasma
No full textUsing 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
Arbitrary Amplitude Ion-Acoustic Solitary Waves in Electron-Ion-Positron Plasma with Nonthermal Electrons
Get PDFUsing 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
New Records of <I>Perrinia stellata</I> (Adams) (Mollusca: Gastropoda: Chelodontidae) and <I>Iravadia quadrasi</I> (Boettger), (Gastropoda: <I>Iravadiidae</I>) from India
No full textAmplitude modulation and soliton formation of an intense laser beam interacting with dense quantum plasma: Symbolic simulation analysis
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