Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"Particle-In-Cell Code"”.
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Implementation and performance evaluation of a GPU particle-in-cell code
In this thesis, I designed and implemented a particle-in-cell (PIC) code on a graphical processing unit (GPU) using NVIDA's Compute Unified Architecture (CUDA). The massively parallel nature of computing on a GPU nessecitated the development of new methods for various steps of the PIC method. I …
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Validation of the DRACO Particle-in-Cell Code using Busek 200W Hall Thruster Experimental Data
… developments to the electric propulsion plume code DRACO as well as a validation and sensitivity analysis of the code using data from an AFRL experiment using a Busek 200 W Hall Thruster. DRACO is a PIC code that models particles kinematically while using finite differences schemes to solve the …
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Multiscale numerical simulations of the magnetized plasma sheath with massively parallel electrostatic particle-in-cell code
Understanding the physics of the plasma boundary and plasma-surface interactions is one of the key scientific challenges in fusion science and engineering. Large-scale integrated simulations and high-performance computing can provide valuable insights on the dynamic phenomena involved at the …
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Improved performance of the hPIC particle-in-cell code by incorporating a new non-uniform implicit mesh based on the PUMI infrastructure
Uniform structured meshes are inefficient at capturing the high plasma gradients in a Scrape-Off-Layer (SOL). Especially in the magnetic and electrostatic sheaths forming in front of the material surfaces. The hPIC Particle In Cell code developed previously at UIUC has been modified to incorporate …
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Collisionless ion collection by non-emitting spherical bodies in E x B fields
The three-dimensional interaction of a magnetized, collisionless flowing plasma with a non-emitting conducting sphere is solved in the entire range of physically allowed parameters, in the ion-collecting regime. This can be considered as the "spherical Mach probe" problem, establishing how the ion …
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Immersed Finite Element Particle-In-Cell Simulations of Ion Propulsion
A new particle-in-cell algorithm was developed for plasma simulations involving complex boundary conditions. The new algorithm is based on the three-dimensional immersed finite element method which is developed in this thesis, and a modified legacy particle-in-cell code. The model also applies a …
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Relativistic electron beam transport for fast ignition relevant scenarios
A crucial issue surrounding the feasibility of fast ignition, an alternative inertial confinement fusion scheme, is the ability to efficiently couple energy from an incident short-pulse laser to a high-density, pre-compressed fuel core. Energy transfer will involve the generation and transport of a …
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PIC simulation of a ceramic-lined Hall-effect thruster
A full Particle-In-Cell code, written by James Szabo [23], was used to model a 50W TAL and 3kW SPT thruster. This code treats single and double ions, neutrals and electrons as particles, moved forward by a leapfrog algorithm at each timestep, matching the lowest of the plasma and the cyclotron …
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Zur Dynamik relativistischer Teilchen in astrophysikalischen Plasmen
… wird die weltweit erste numerische Simulation eines selbstinduzierten freien Elektronen Lasers (FEL) vorgestellt. Zu ihrer Durchf¨uhrung wurde ein massen– und energieerhaltender ”Particle in Cell Code“–(PIC) verwendet, der es erlaubt eine Region in einer Pulsarmagnetosph¨are entsprechend der …
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Computational study of hot electron generation and energy transport in intense laser produced hot dense matter
… ultra high power lasers are capable of producing high energy density (HED) plasmas, in controlled way, with a density greater than solid density and at a high temperature of keV (1 keV ~ 11,000,0000 K). Matter in such extreme states is par- ticularly interesting for (HED) physics such as …
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Effects of Radiation Damping in Extreme Ultra-intense Laser-Plasma Interaction
Recent advances in the development of intense short pulse lasers are significant. Now it is available to access a laser with intensity 1021 W/cm2 by focusing a petawatt class laser. In a few years, the intensity will exceed 1022 W/cm2, at which intensity electrons accelerated by the laser get …
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Numerical Simulation of Ion Waves in Dusty Plasmas
There has been a great deal of interest in investigating numerous unique types of electrostatic and electromagnetic waves and instabilities in dusty plasmas. Dusty plasmas are characterized by the presence of micrometer or submicrometer size dust grains immersed in a partially or fully ionized …
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Experimental and numerical validation of ion extractor grids
… experimental plasma thruster named the Helicon Injected Inertial Plasma Electrostatic Rocket (HIIPER) at the University of Illinois at Urbana-Champaign (UIUC) is currently being investigated. HIIPER features an Inertial Electrostatic Con nement (IEC) grid that is made asymmetrical by cutting out …
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Microwave Triggered Laser Ionization of Air
In this thesis the measurements and analyses of high power electromagnetic wave interaction with a laser-induced plasma (LIP) have been investigated. The laser-induced breakdown processes in air generated by focusing a 600 mJ, 7 ns pulselength, 1064 nm wavelength Nd:YAG laser onto a 30 μm spot size …
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Laser Wakefield Accelerator Simulations Using EPOCH
… of electron acceleration. These systems use high intensity laser pulses to drive a large amplitude plasma density wake. This wake is then used to trap and accelerate electrons to high energies. This particle acceleration technique still requires considerable research in order to produce the high …
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Theoretical and Numerical Studies of Frequency Up-shifted Ionospheric Stimulated Radiation
… electromagnetic emission (SEE) 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 …
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Analysis of Plasma Wave Irregularities Generated during Active Experiments in Near-Earth Space Environment
… analysis of plasma irregularities generated during two active space experiments: the injection of an artificial dust layer, and high-power radio waves. The objective of the "first experiment is to examine the effects of artificially created dust layers on the scatter of radars from plasma …
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Two-dimensional periodic surface lattice high power millimetre wave experiment
… harmonic Gyrotron Backward Wave Oscillator (BWO) interaction with a two dimensional periodic surface lattice (PSL) has been observed. The major achievements in the thesis are the 1) design, 2) simulation, 3) construction and 4) operation of the experiment.;Two different methods were used to …