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Showing 1 to 15 of 15 for “"PIC simulation"”.
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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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PIC simulation of SPT Hall thrusters : high power operation and wall effects
The fully kinetic Hall Thruster simulation built by [1] and used by [2] is further refined and used to obtain results for the P5 SPT Hall thruster at 3kw and 5kw operation. Performance data agree well with experiments [3], although very low values of anomalous diffusivity must be used for …
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Parallelization of particle-in-cell simulation modeling Hall-effect thrusters
… fully kinetic particle-in-cell Hall thruster simulation is adapted for use on parallel clusters of computers. Significant computational savings are thus realized with a predicted linear speed up efficiency for certain large-scale simulations. The MIT PIC code is further enhanced and updated …
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Second Harmonic Generation Stimulated Electromagnetic Emissions during High Power High Frequency Radio Wave Interaction with the Ionosphere
… and SH-NSEEs established, Particle- In-Cell (PIC) simulations are used to investigate the characteristics of a PW- NSEE herein referred to as the "SBS line", produced as a result of stimulated Brillouin scatter (SBS) instability in which the pump EM wave decays into a backscattered EM wave and …
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Fully-kinetic PIC simulations for Hall-effect thrusters
… physics of thruster operation. Originally, simulations assumed a continuum approximation for electrons and used magnetohydrodynamic fluid equations to model the significant processes. While these codes were computationally efficient, their applicability to non-equilibrated regions of the …
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Advances in fully-kinetic PIC simulations of near-vacuum Hall thruster and other plasma systems
… physics of thruster operation. Originally, simulations assumed a continuum approximation for electrons and used magnetohydrodynamic fluid equations to model the significant processes. While these codes were computationally efficient, their applicability to non-equilibrated regions of the …
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An arbitrary curvilinear coordinate particle in cell method
A new approach to the kinetic simulation of plasmas in complex geometries, based on the Particle-in-Cell (PIC) simulation method, is explored. In this method, called the Arbitrary Curvilinear Coordinate PIC (ACC-PIC) method, all essential PIC operations are carried out on a uniform, unitary square …
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Mass-spectroscopy and modeling of capacitive coupled hydrogen plasmas
… measured using a hairpin probe. Particle-in-cell simulations including a complex hydrogen chemistry are performed which enable direct comparison to the experiment. In the steady-state operation, the electron density increases with both power and pressure, and the ion flux magnitudes and energy …
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Cubesat Wakes in the Earth’s Ionosphere
… of the CubeSat: 10cm cubed satellites that typically deploy in constellations for less than $100,000. Spacecraft instrumentation design must be redefined to abide by the compact CubeSat payload. Furthermore, the CubeSat dimension must be considered with respect to characteristic length scales …
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Simulation Studies of Parametric Processes Associated with Ionospheric Electromagnetic Radiation
… theoretical and electrostatic Particle-In-Cell PIC simulation models. The simulation plasma is driven with a uniform oscillating electric field directed nearly perpendicular to the background geomagnetic field {B} to consider interactions when <i>ω<sub>uh</sub></i> is near electron cyclotron …
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Particle-In-cell simulations of nonlocal and nonlinear effects in inductively coupled plasmas
… fields are studied by using a particle-in-cell (PIC) simulation. In the low pressure, low frequency regime, electron mean free paths are large relative to device size and the trajectories are strongly curved by the induced radio frequency (RF) magnetic field. This causes problems for linear …
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A Continuum Kinetic Investigation into the Role of Transport Physics in the Bohm Speed formulation
… The model is verified using particle-in-cell (PIC) kinetic simulations and is shown to accurately predict the Bohm speed in cases away from the asymptotic limit. This thesis investigates the new model using the continuum kinetic approach on the Gkeyll software framework. The continuum kinetic …
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The Mid-Latitude Ionosphere: Modeling and Analysis of Plasma Wave Irregularities and the Potential Impact on GPS Signals
… utilizing gyro-kinetic Particle-In-Cell (PIC) simulation techniques with Monte Carlo collisions for the first time. The purpose of this investigation is to identify the mechanism responsible for the nonlinear saturation as well as the associated anomalous transport. The simulation results …
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Fully kinetic particle-in-cell simulations of plasma-surface-dust interactions for lunar exploration
… structure near lunar surface through numerical simulations. Firstly, we will introduce the fundamental assumptions of our analytic and simulation studies. We will present the derivation of a 1-D semi-analytic model to numerically obtain the quantities of interest as functions of the distance …
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Modellazione della rapidita di decadimento β nel plasma: studio teorico di PANDORA
… di codici 3D ottimizzati di particelle in cella (PIC) volti a modellare la dinamica di elettroni e ioni in modo auto-coerente, catturando la fisica più rilevante per ciascuno e in grado di fornire informazioni risolte nello spazio su densità, energia, distribuzione dello stato di carica (CSD) e …