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Showing 1 to 20 of 27 for “"Hall Thrusters"”.
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Transient one dimensional numerical simulation of Hall thrusters
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1993.
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Investigation of Magnetic Field Profile Effects in Hall Thrusters
… profiles to the acceleration region length of a Hall thruster. The general transport equations were simplified and solved using a one-dimensional analysis. Some of the model assumptions include quasineutrality, Maxwellian electrons, and negligible thruster wall effects. The solved equation kept …
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Semi-analytical model of ionization oscillations in Hall thrusters
… understand the breathing-mode oscillation within Hall thrusters. These oscillations have been present and accepted within Hall thrusters for decades, but recent interest in the oscillation has occurred partly due to a possible connection between wall erosion and the oscillations. The first part of …
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Two-dimensional hybrid particle-in-cell modeling of Hall thrusters
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1995.
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Hybrid-PIC modeling and electrostatic probe survey of Hall thrusters
… study the physics of the acceleration process in Hall thrusters, an evolved hybrid particle-in-cell (PIC) numerical model was developed. A set of quasi-one-dimensional fluid equations are used for electrons, and a particle-tracking Boltzmann solver is used for the heavy species. The two solutions …
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Fluctuation induced cross-field transport in Hall thrusters and tokamaks
… both magnetic confinement fusion devices and Hall thrusters exhibit anomalous cross-field particle diffusion. This higher than predicted "loss" of particles has significant practical implications for both classes of experiment. In the case of magnetic confinement fusion experiments, such as …
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The Effect of the 2-Dimensional Magnetic Field Profile in Hall Thrusters
<p>Electric propulsion engines, in particular Hall thrusters, provide the possibility of long-distance, low-cost space travel. The geometrical details of the Hall thrusters, especially the magnetic field prole, are crucial to improving their efficiency. The effect of the magnetic field structure …
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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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Continuous-wave cavity ring down spectroscopy sensor for Hall thruster erosion measurement
Hall thruster and other Electric propulsion (EP) devices have become appealing alternatives to traditional chemical propulsion thrusters for space applications due to this high specific impulse (Isp), which allows high fuel efficiency. However, the uncertainty of the lifetime for Hall thruster …
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Modeling of Hall thruster lifetime and erosion mechanisms
Hall thrusters and other types of electric propulsion have become a tempting alternative to traditional chemical propulsion systems for in-space applications due to the high specific impulses (Isp) they provide. Large Isp translates to a highly desirable mass savings and system trades show that …
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Development of the plasma thruster particle-in-cell simulator to complement empirical studies of a low-power cusped-field thruster
Cusped-field plasma thrusters are an electric propulsion concept being investigated by several laboratories in the United States and Europe. This technology was implemented as a low-power prototype in 2007 to ascertain if durability and performance improvements over comparable Hall thruster designs …
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Development and characterization of a diverging cusped field thruster and a lanthanum hexaboride hollow cathode
… of an ion beam, similar to traditional Hall type thrusters. The design, referred to as a Diverging Cusped Field (DCF) thruster, employs aspects of both existing cusped field thrusters and traditional Hall thrusters while including several unique design features aimed at increasing …
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A technical evaluation of a novel cell-surface cytokine detection technology
Hall thrusters have become a tempting alternative to traditional chemical propulsion systems due to the great mass savings they provide through high specific impulses. However, a major stumbling block to their widespread integration is uncertainty about the thruster plume's interaction with …
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Computational modeling of a Hall thruster plasma plume in a vacuum tank
Hall thrusters have become a tempting alternative to traditional chemical propulsion systems due to the great mass savings they provide through high specific impulses. However, a major stumbling block to their widespread integration is uncertainty about the thruster plume's interaction with …
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3D plume modeling of SPT-100
Hall thrusters are a spacecraft propulsion device for orbit maintenance and north-south station keeping. One of the concerns about Hall thrusters is the sputtering of high energy ions which could result in the erosion of sensitive surface coatings used for solar cell elements and thermal control. …
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Numerical models of Hall thruster ionization oscillations
… thesis, low frequency ionization oscillations in Hall thrusters resembling the breathing mode are studied through computational simulation. The relationship between wall erosion and discharge current oscillations is analyzed using particle-in-cell simulation, and a series of parametric simulations …
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Improvements to a fully kinetic Hall thruster simulation code and characterization of the cylindrical cusped field thruster
… of the operation of miniaturized cylindrical Hall thrusters. This class of space propulsion devices has come under attention since the 1990s as a possible candidate for the propulsion of 100-1000 kg satellites. In first part, a fully kinetic simulation code developed at the MIT Space …
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Computational modeling of expanded plasma plumes in vacuum and in a tank
… fuel savings for various space missions. Hall thrusters, specifically, have shown great promise over the years due to their near optimum specific impulse for a number of space missions. The Hall thruster, however, releases a partially ionized plasma plume which contaminates any surface it …
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Theoretical and experimental investigation of Hall thruster miniaturization
… in the area of formation flight. Miniaturized Hall thrusters have been identified as a candidate for lightweight, high specific impulse propulsion systems that can extend mission lifetime and payload capability. A set of scaling laws was developed that allows the dimensions and operating …
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