Download or read book Low frequency Fluctuations in Plasma Magnetic Fields written by and published by . This book was released on 1992 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is shown that even a non-magnetized plasma with temperature T sustains zero-frequency magnetic fluctuations in thermal equilibrium. Fluctuations in electric and magnetic fields, as well as in densities, are computed. Four cases are studied: a cold, gaseous, isotropic, non-magnetized plasma; a cold, gaseous plasma in a uniform magnetic field; a warm, gaseous plasma described by kinetic theory; and a degenerate electron plasma. For the simple gaseous plasma, the fluctuation strength of the magnetic field as a function of frequency and wavenumber is calculated with the aid of the fluctuation-dissipation theorem. This calculation is done for both collisional and collisionless plasmas. The magnetic field fluctuation spectrum of each plasma has a large zero-frequency peak. The peak is a Dirac?-function in the collisionless plasma; it is broadened into a Lorentzian curve in the collisional plasma. The plasma causes a low frequency cutoff in the typical black-body radiation spectrum, and the energy under the discovered peak approximates the energy lost in this cutoff. When the imposed magnetic field is weak, the magnetic field were vector fluctuation spectra of the two lowest modes are independent of the strength of the imposed field. Further, these modes contain finite energy even when the imposed field is zero. It is the energy of these modes which forms the non-magnetized zero-frequency peak of the isotropic plasma. In deriving these results, a simple relationship between the dispersion relation and the fluctuation power spectrum of electromagnetic waves if found. The warm plasma is shown, by kinetic theory, to exhibit a zero-frequency peak in its magnetic field fluctuation spectrum as well. For the degenerate plasma, we find that electric field fluctuations and number density fluctuations vanish at zero frequency; however, the magnetic field power spectrum diverges at zero frequency.
Download or read book Low frequency fluctations i e fluctuations of plasma magnetic fields written by Samuel Benjamin Cable and published by . This book was released on 1992 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Frequency Fluctuations in a Plasma written by Stanford University. Microwave Laboratory and published by . This book was released on 1961 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electromagnetic Fluctuations In Plasma written by A Sitenko and published by Elsevier. This book was released on 2012-12-02 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electromagnetic Fluctuations in Plasma focuses on the theoretical investigation of the electromagnetic properties of a plasma (an ionized gas). The manuscript first takes a look at the general theory of fluctuations and electromagnetic fluctuations in media with space-time dispersion. Discussions focus on spectral distribution of the fluctuations and energy dissipation in the medium; dielectric and magnetic permittivities in a medium with spatial dispersion; current, charge, and field fluctuations in a medium; and inversion of the fluctuation-dissipation theorem. The text then examines the electrodynamic properties of an electron plasma and electromagnetic fluctuations in an electron plasma. The publication ponders on fluctuations in an electron-ion plasma and electron plasma in a magnetic field. Topics include plasma dielectric permittivity tensor in a magnetic field; longitudinal plasma oscillations in a magnetic field; fluctuations in charge and current densities in an equilibrium electron-ion plasma; and electron and ion density fluctuations in an equilibrium plasma. The text also tackles the passage of charged particles through plasma and dynamic friction and diffusion coefficients in a plasma. The book is a dependable reference for readers interested in the study of the electromagnetic properties of a plasma.
Download or read book Low Frequency Fluctuations in Plasma Generation Mechanisms and Their Suppression written by Stanford University. Microwave Laboratory and published by . This book was released on 1961 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Anomalous Contributions of Low frequency Long wavelength Fluctuations to Spatial Diffusion of a Plasma in a Magnetic Field written by Setsuo Ichimaru and published by . This book was released on 1971 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electromagnetic Fluctuations in Plasma written by Alekseĭ Grigorʹevich Sitenko and published by . This book was released on 1967 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Low frequency Density Fluctuations in Dipole confined Laboratory Plasmas written by Jennifer L. Ellsworth and published by . This book was released on 2010 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low-frequency fluctuations of plasma density, floating potential, ion saturation current, visible light intensity, and edge magnetic field are routinely observed in the Levitated Dipole Experiment (LDX). For the purposes of this thesis, we define low-frequency as W “Wbe where Wbe is the electron bounce frequency. These fluctuations in a laboratory dipole confined plasma lead to turbulence mixing that maintain peaked density profiles. The relationship between the different types of low-frequency fluctuations and plasma density transport is considered. Two 16-channel photodiode arrays were designed and constructed to study the spatial and temporal structure of these fluctuations as part of this dissertation. In addition to the photodiode arrays, a four-channel microwave interferometer is used to estimate the density profile and to measure density fluctuations in the plasma. Several electrostatic probes, including a 24-channel floating probe array, measure fluctuations at the plasma edge and eight Mirnov coils measure magnetic fluctuations. The fluctuations fall into three general categories: broadband, turbulent fluctuations observed during nearly all plasma conditions; quasi-coherent fluctuations with low azimuthal mode numbers and peak frequencies on the order 1 kHz observed during discharges with low neutral pressure; and coherent fluctuations with zero toroidal mode number and peak frequencies on the order of 100 Hz, observed during discharges with moderate neutral fueling. The relationship between time-averaged fluctuation characteristics and plasma parameters are explored. The spatial structure of the fluctuations for several representative shots are discussed. The turbulent fluctuations and concurrent density profiles are compared to quasilinear diffusion of interchange mixing in dipolar plasmas for cases where the fluctuations are random. I show that the quasilinear diffusion equation agrees well with the experimental observations of random fluctuations, supporting the conclusion that interchange mixing is causing inward transport that results in peaked density profiles. For other cases, where nonlinear effects appear to dominate the plasma dynamics, the saturated fluctuation amplitudes are compared to the plasma density profiles.
Download or read book Non Linear Theory and Fluctuations written by A. I. Akhiezer and published by Elsevier. This book was released on 2017-03-22 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasma Electrodynamics, Volume 2: Non-Linear Theory and Fluctuations deals with the theory of nonlinear waves in a collisionless plasma, including the quasilinear theory, the theory of plasma turbulence, and the theory of electromagnetic fluctuations in a plasma. Topics covered range from nonlinear high-frequency waves in a cold plasma to the theory of plasma oscillations in the quasilinear approximation. Nonlinear wave-particle interactions are also discussed, along with scattering and transformation of waves in a plasma. Comprised of six chapters, this volume begins with a study of nonlinear waves in a collisionless plasma, focusing on nonlinear high-frequency waves in a cold plasma; Langmuir waves in a non-relativistic plasma; and longitudinal, transverse, and coupled longitudinal-transverse waves in a relativistic plasma. After expounding on the quasilinear theory, which describes the effects of the first approximation in terms of the plasma wave energy, the nonlinear interaction of waves and particles is considered. The last three chapters explore the theory of electromagnetic fluctuations in a plasma; the theory of scattering processes and the transformation of waves in a plasma; and the scattering of charged particles in a plasma. The polarization energy losses when charged particles move in a plasma are calculated. This book will be of interest to physicists.
Download or read book Measurement of Low Frequency Magnetic Fluctuations in the Magnetosphere written by Bodo Parady and published by . This book was released on 1974 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Introduction to Alfven Waves written by Rodney Cross and published by CRC Press. This book was released on 1988-11 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This valuable introduction to the physics of Alfven waves in laboratory and space plasmas is accessible to anyone with a elementary knowledge of plasma physics. The book will give graduate students all the background information necessary to understand the research literature. Much of the material is recent and may contain some surprises even for experts.
Download or read book Free Oscillations of an Electron Plasma in a Magnetic Field written by Aleksandr Ilʹich Akhiezer and published by . This book was released on 1962 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fluctuations and Non Linear Wave Interactions in Plasmas written by A. G. Sitenko and published by Elsevier. This book was released on 2016-09-20 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluctuations and Non-linear Wave Interactions in Plasmas talks about a theory of fluctuations in a homogenous plasma. The title takes into consideration non-linear wave interactions. The text first presents the statistical description of plasma, and then proceeds to covering non-linear electrodynamic equations. Next, the selection deals with the electrodynamic properties of magento-active plasma and waves in plasma. The text also tackles non-linear wave interactions, along with fluctuations in plasmas. The next chapter talks about the effect of non-linear wave interaction on fluctuations in a plasma. Chapter 8 details fluctuation-dissipation theorem, while Chapter 9 discusses kinetic equations. The tenth chapter covers the scattering and radiation of waves and the last chapter tackles wave interaction in semi-bounded plasma. The book will be of great use to scientists and professionals who deals with plasmas.
Download or read book PLASMA FLUCTUATIONS IN CROSSED ELECTRIC AND MAGNETIC FIELDS written by Hugh Wallace Batten and published by . This book was released on 1954 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experiment to Measure Low Frequency Plasma Fluctuations by Large Aperture Homodyne Methods written by Thomas Robert Angel and published by . This book was released on 1980 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Frequency Oscillation of a Plasma in a Magnetic Field written by Miloslav Sylvester Tekula and published by . This book was released on 1974 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Frequency Spectra of Low Frequency Fluctuations in a Plasma written by Stanford University. Microwave Laboratory and published by . This book was released on 1960 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
