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Showing 1 to 20 of 31 for “"plasma waves"”.
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Low frequency plasma waves at Mars
… eight years of observations of low frequency plasma waves produced in the interaction of the solar wind with the Martian ionosphere. Using the MAG/ER data, I identify the properties and physical origins of the waves in the magnetosheath, magnetic pileup region, and ionosphere. I find that the …
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Identifying Signatures of Plasma Waves and Reconnection Associated with Kelvin-Helmholtz Activity
… the shocked solar wind and magnetospheric plasma. Understanding the dynamics of the plasma processes at the magnetopause boundary is crucial to the study of plasma transport into the magnetosphere. Previous studies have shown that there exists a temperature asymmetry in the plasma sheet. …
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Scattering of Microwaves From Plasma Waves Excited in an Electron Beam-Plasma Interaction
Made available in DSpace on 2015-05-12T22:38:43Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7206869.PDF: 2550049 bytes, checksum: 105d3199f28887f712e11f133771c169 (MD5) Previous issue date: 1971
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Parametric Coexcitation of Ion-Acoustic Waves and Electron Plasma Waves by a High Frequency Electric Field
Made available in DSpace on 2015-05-12T22:38:48Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7212400.PDF: 2489922 bytes, checksum: 6d9baa59b71bcfff52298ff725c467d9 (MD5) Previous issue date: 1971
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Enhanced plasma wave spectral asymmetries
… is capable of exciting enhanced electron plasma waves via a parametric wave-plasma coupling interaction. Incoherent backscatter radar is used to obtain detailed power spectra of these enhanced plasma waves. Power and frequency asymmetries are detected between spectra of enhanced plasma …
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An Alpha Loss-Cone Instability in the Central Cell of a Tandem Mirror Reactor
… space is capable of destabilizing low frequency plasma waves, thus affecting the energy balance in a tandem mirror plasma.
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Numerical analysis of radio-frequency sheath-plasma interactions in the ion cyclotron range of frequencies
Electromagnetic plasma waves in the ion cyclotron range of frequencies (ICRF) are routinely used in magnetic fusion experiments to heat plasmas and drive currents. However, many experiments have revealed that wave energy losses in the plasma edge and at the wall are significant, and detected that …
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Electron acceleration and loss caused by wave-particle interactions in the Van Allen radiation belts
… describe the interaction between electrons and plasma waves. The most important plasma waves are chorus, plasmaspheric hiss, and EMIC waves. Here, new statistical models of the diffusion coefficients for these waves are presented, which considerably improve existing models. Among others, they …
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Studies of Spectral Modification in Intense Laser Pulse-Plasma Interactions
Laser pulses propagating through plasma undergo spectral broadening through local energy exchange with driven plasma waves. During propagation, a high power laser pulse drives large amplitude plasma waves, depleting the pulse energy. At the same time, the large amplitude plasma wave provides a …
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Numerical models for the simulation of Raman amplification in plasma
Raman amplification in plasma is a potential method of producing ultra-short, ultra-intense laser pulses. As amplification in realistic systems involves many competing nonlinear processes, numerical simulations are often used to better understand the associated complex behaviour. Different models …
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A MODEL OF THE BEAM-PLASMA DISCHARGE
The beam-plasma instability is one of the most basic and general situations in plasma physics. Under suitable conditions, it gives rise to strong electrostatic waves, which interact with the plasma electrons and ions. If the neutral density is high enough, a charge is ignited, the Beam-Plasma …
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Exploring the edge of electromagnetism using extreme fields
… slow light experiments. Maximum amplitude plasma waves are considered as a possible testing ground for nonlinear electrodynamics with regards to electron energy gain. Finally the eects of the coupling between the electromagnetic eld and the spin of a relativistic classical particle are …
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Vlasov simulations of kinetic enhancement of Raman backscatter in laser fusion plasmas
Stimulated Raman scattering (SRS) is studied in plasmas relevant to inertial confinement fusion (ICF). The Eulerian Vlasov-Maxwell code ELVIS was developed and run for this purpose. Plasma waves are heavily Landau damped in the regimes of interest, and coupled-mode theory predicts back-scattered …
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Formation of small-scale irregularities in the auroral E region
… Farley-Buneman (F-B) and gradient drift (G-D) plasma instabilities is considered. A general 2-D dispersion equation is derived and analyzed. Then, a review of existing nonlinear theories is given. The thrust is on the theory predictions with respect to the phase velocity of plasma waves. As an …
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Numerical simulation of wave-plasma interactions in the ionosphere
… by means of high-power electromagnetic (EM) waves can result in the excitation of a diverse range of plasma waves and instabilities. This thesis presents the development and application of a GPU-accelerated finite-difference time-domain (FDTD) code designed to simulate the time-explicit …
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Microwave emission in a plasma filled nonuniform backward wave oscillator
… of particles in high energy physics, heating of plasma particles, radiation treatment of surfaces in manufacturing, and for electronic warfare in the military. Among the many sources of high power microwaves, the backward wave oscillator (BWO) is one of the oldest devices and has undergone a …
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Theoretical and Numerical Studies of Frequency Up-shifted Ionospheric Stimulated Radiation
… produced by interactions of high-power radio waves with the Earth's ionosphere is currently a topic of significant interest in ionospheric modification physics. SEE is believed to be produced by nonlinear wave-wave interactions involving the electromagnetic and electrostatic plasma waves in …
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Problems in cosmology and numerical relativity
… can interact with a weak magnetic field in a plasma, resulting in a wide range of phenomena, such as the parametric excitation of plasma waves by gravitational waves. This mechanism has been studied in different contexts in the literature, such as the possibility of indirect detection of …
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Wave-particle interactions in the solar wind and solar flares
<p>Resonant interactions between particles and plasma waves play an important role in both the solar wind and solar flares. The dynamics of plasma turbulence in these settings controls the strength of the interactions, by determining the amplitudes of the small-scale electromagnetic fluctuations …
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Frequency chirping of energetic particle driven modes in tokamaks; Self-consistent modelling and simulation
Long range frequency chirping waves have been observed in various plasma experiments. Theoretical toy models and simulations show that the nonlinear saturation of an initially unstable plasma wave driven by energetic particles may lead to the emergence of chirping waves. In toroidal configurations, …
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