Results 211 to 220 of about 343 (262)
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Start‐Up Transient in a Hall Thruster
Contributions to Plasma Physics, 2006AbstractFor the first time a two dimensional axisymmetric fully kinetic Particle‐in‐Cell/Monte Carlo Collision (PICMCC) model is used to describe the start‐up transient of the acceleration channel in a Hall thruster. The Poisson equation and a secondary electron emission model are invoked for the description of the plasma dynamic phase.
F Taccogna +3 more
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34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, 1998
The acceleration of the plasma in the Hall thruster to supersonic velocities is examined by the use of a steady state model. Flows that are smooth across the sonic transition plane are found. The possibility of generating flows in which the acceleration across the sonic plane is abrupt, is also studied.
Fisch, N. J., Fruchtman, A.
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The acceleration of the plasma in the Hall thruster to supersonic velocities is examined by the use of a steady state model. Flows that are smooth across the sonic transition plane are found. The possibility of generating flows in which the acceleration across the sonic plane is abrupt, is also studied.
Fisch, N. J., Fruchtman, A.
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37th AIAA Plasmadynamics and Lasers Conference, 2006
The cylindrical Hall thruster, proposed and studied at the PPPL features high ionization efficiency, quiet operation, ion acceleration in a large volume-to-surface ratio channel, and performance comparable with the state-of-the-art Hall thrusters. These characteristics were demonstrated in low and medium power ranges.
Y. Raitses, Artem Smirnov, N. Fisch
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The cylindrical Hall thruster, proposed and studied at the PPPL features high ionization efficiency, quiet operation, ion acceleration in a large volume-to-surface ratio channel, and performance comparable with the state-of-the-art Hall thrusters. These characteristics were demonstrated in low and medium power ranges.
Y. Raitses, Artem Smirnov, N. Fisch
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Kinetic Effects in Hall Thruster Discharge
42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2006Recent analytical studies and particle-in-cell simulations suggested that the electron velocity distribution function in E×B discharge of annular geometry Hall thrusters is non-Maxwellian and anisotropic. The average kinetic energy of electron motion in the direction parallel to the thruster channel walls (across the magnetic field) is several times ...
I. D. Kaganovich +3 more
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Analysis of Airbreathing Hall-Effect Thrusters
Journal of Propulsion and Power, 2011The principle idea of using air breathing electrical propulsion for a vehicle flying at orbital speed on the edge of Earth’s atmosphere is examined. In this paper, we present a simple model of a Hall Effect thruster in which the propellant is an ambient air.
Leonid Pekker, Michael Keidar
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Spontaneous oscillations in a Hall thruster
IEEE Transactions on Plasma Science, 1999Low frequency oscillations in a stationary plasma thruster (SPT) have been studied using optical diagnostics and numerical models. The regime of low frequency, large amplitude current oscillations has been especially investigated. The current oscillations are associated with strong oscillations of the light emitted by the plasma in that region. A quasi-
F. Darnon +4 more
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A laboratory-scale Hall thruster
31st Joint Propulsion Conference and Exhibit, 1995Anticipating future Stationary Plasma Thruster (SPT) evaluation programs, we designed, constructed, and tested a 400 Watt class SPT and propellant feed system. This "laboratory-scale" Hall thruster aids in developing advanced plume diagnostics. The SPT's performance was measured by a thrust stand under high vacuum operation.
JR., SZABO, ., JAMES POLLARD
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Tutorial: Physics and modeling of Hall thrusters
Journal of Applied Physics, 2017Hall thrusters are very efficient and competitive electric propulsion devices for satellites and are currently in use in a number of telecommunications and government spacecraft. Their power spans from 100 W to 20 kW, with thrust between a few mN and 1 N and specific impulse values between 1000 and 3000 s.
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Conducting Wall Hall Thrusters
49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 2013A unique configuration of the magnetic field and channel geometry near the wall of Hall thrusters, called magnetic shielding, has recently demonstrated the ability to significantly reduce the erosion of the boron nitride (BN) walls and extend the life of Hall thrusters by orders of magnitude.
Dan M. Goebel +3 more
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Conducting Wall Hall Thrusters
IEEE Transactions on Plasma Science, 2015A unique configuration of the magnetic field and channel geometry near the wall of Hall thrusters, called magnetic shielding, has recently demonstrated the ability to significantly reduce the erosion of the boron nitride (BN) walls and extend the life of Hall thrusters by orders of magnitude.
Dan M. Goebel +5 more
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