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Showing 1 to 20 of 64 for “"Maxwellian"”.
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Destabilizing Effect of Alpha Particles in a Maxwellian Plasma
Made available in DSpace on 2017-07-06T18:59:18Z (GMT). No. of bitstreams: 3 Wang_Ming-Yang_MS.pdf: 22144784 bytes, checksum: c8a569f6b7142d291941a153c9ec1d6f (MD5) Wang_Ming-Yang_MS_ABS.pdf: 493903 bytes, checksum: 33885173b26c6631d0bc255a2b9f7175 (MD5) license.txt: 4813 bytes, checksum: …
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A Multigroup One-Dimensional Tokamak Fusion Plasma Simulation for Non-Maxwellian Ions Slowing Down in a Thermal Background
Made available in DSpace on 2017-07-06T18:55:22Z (GMT). No. of bitstreams: 3 Metzger_John_D_MS.pdf: 41206592 bytes, checksum: a0be3867681c02996506c2473d60f688 (MD5) Metzger_John_D_MS_ABS.pdf: 545248 bytes, checksum: 9c976cf6a227887c97014849b6ac438a (MD5) license.txt: 4813 bytes, checksum: …
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Determination of the ion distribution function during magnetic reconnection in the versatile toroidal facility with a gridded energy analyzer
… with a theoretical fit constructed from a double Maxwellian distribution, from which the temperatures and drift velocities are found as functions of space and time. It is found that the ion temperature of each Maxwellian exhibit minor temporal variations during reconnection which are negligible in …
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Space-charge dynamics and neutron generation in an inertial-electrostatic confinement device
… to burn advanced fuels like D-He$\sp3$ in a non-Maxwellian, high density core. These aneutronic reactions are ideal for direct energy conversion.
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Multi-fluid Plasma Modelling
… plasma modelling. In this model, the non-Maxwellian plasma is decomposed into an arbitrary number of energy-resolved fluids. Each fluid is charge-neutral, canhave arbitrary rotation, and is described by a Maxwellian distribution function. To investigate the model numerically, it is …
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Multi-fluid Plasma Modelling
… plasma modelling. In this model, the non-Maxwellian plasma is decomposed into an arbitrary number of energy-resolved fluids. Each fluid is charge-neutral, canhave arbitrary rotation, and is described by a Maxwellian distribution function. To investigate the model numerically, it is …
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STABILITY OF UPGOING AURORAL ION BEAMS AT 33 R(E) (PLASMA, MAGNETOSPHERE, WAVE-PARTICLE INTERACTIONS)
… of energy from the hydrogen to the oxygen. Maxwellian fits to the beam distributions are used to study the stability of the beams with respect to various low frequency electromagnetic waves. By identifying the growing wave modes generated by the observed distribution functions, one can …
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Fully-kinetic PIC simulations for Hall-effect thrusters
… distributions of the various species remained Maxwellian at all times. The next generation of simulations used the fully-kinetic particle-in-cell (PIC) model. Although much more computationally expensive than the fluid codes, the full-PIC codes allowed for non-equilibrated thruster regions and …
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Advances in fully-kinetic PIC simulations of near-vacuum Hall thruster and other plasma systems
… distributions of the various species remained Maxwellian at all times. The next generation of simulations used the fully-kinetic particle-in-cell (PIC) model. Although much more computationally expensive than the fluid codes, the full-PIC codes allowed for non-equilibrated thruster regions and …
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Fokker -Planck Modeling of Spherical Inertial Electrostatic, Virtual -Cathode Fusion Systems
… Fokker-Planck equation in which the Maxwellian ion population---absolutely confined in the electrostatic well---is dominant correspond to lowest ion recirculation powers (and hence highest fusion energy gains). Also, it is shown that the square-well assumption---used ubiquitously in …
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Investigation by neutron diffraction utilizing white neutron radiation
… The most probable velocity was used to index the maxwellian distributions from polycrystalline materials. Investigations were done with white neutron radiation of various silicon steel samples of different preferred orientation. A method is described by which the preferred orientation of samples …
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High power impulse magnetron sputtering (HIPIMS) : Fundamental plasma studies and material synthesis.
… target and gas ions was found to comprise of two Maxwellian distributions. First cold Maxwellian distribution was fitted to the main peak of the IEDF that had the lower average energy which is attributed to collisions with thermalised gas atoms and ions. The higher energy distribution is assumed …
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Investigation of Magnetic Field Profile Effects in Hall Thrusters
… the model assumptions include quasineutrality, Maxwellian electrons, and negligible thruster wall effects. The solved equation kept magnetic field as an input to the model for the analysis. The magnetic field was altered by changing the shape through the thruster, while keeping the maximum point …
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Deposition of Energy From Low-Energy Neutrons in the Icru Tissue Sphere
… in character. The thermal neutron source had a Maxwellian distribution appropriate for room temperature (20(DEGREES)C).
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X-ray Radiative Signatures Influenced by Nonthermal Effects in High-Energy-Density Laboratory Plasmas of Mid-Atomic-Number Z-pinches
… effects describe the interaction of non-Maxwellian electrons or high-energy, external photons with inner-shell electrons in plasma ions, producing distinct radiative signatures which, for example, can diagnose the cooler regions of ICF plasmas as well as plasma accretion around …
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Calculation involving hydrogen-hydrogen(2) collisional cooling processes for use in astrophysics
… at constant energy were integrated over a Maxwellian velocity distribution to determine a rate coefficient. Then the equilibrium level populations will be solved for a given temperature and H density. Finally, the cooling and spectra are calculated from these equilibrium populations.
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Resonant wave-ion interactions in the heliosphere: I. Interplanetary traveling shocks, II. Ion heating and acceleration in the extended corona
… distribution functions obtained are clearly not Maxwellian or bi-Maxwellian. Our solutions describe some of the non-thermal phenomena frequently observed in the extended corona: anisotropic temperature distributions, and differential streaming between protons and minor ion species. However, we …
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Characteristics of the Fields in the Near and Far Zone Of Antennas and Its Significance in Wireless Communication
… the near-field and the far-field using a Maxwellian framework. The implications of the near-field environment are then discussed. It appears that the concept of near and far fields are not clearly interpreted in the wireless communication literature. This dissertation tries to provide some …
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Laserless slow atom source for loading atom traps
… region. For a 30 cm radius of curvature and a Maxwellian velocity distribution at the atomic beam source, a flux of 10$\sp9$ atoms/s is expected to be delivered to the trapping region. Experimentally, a flux of only 10$\sp6$ atoms/s is observed. The flux deficit is attributed to an attenuation …
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Construction of a gridded energy analyzer for measurements of ion energy distribution in the versatile toroidal facility
… function was determined to be roughly Maxwellian in nature.
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