Results 161 to 170 of about 6,632 (182)

Hall-Effect Thruster Channel Surface Properties Investigation

Journal of Propulsion and Power, 2012
Surface properties of Hall-effect thruster channel walls play an important role in the performance and lifetime of the device. Physical models of near-wall effects are beginning to be incorporated into thruster simulations, and these models must account for evolution of channel surface properties due to thruster operation.
David G. Zidar, Joshua L. Rovey
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Effects of wall electrodes on Hall effect thruster plasma

Physics of Plasmas, 2015
This paper investigates the physical mechanisms that cause beneficial and detrimental performance effect observed to date in Hall effect thrusters with wall electrodes. It is determined that the wall electrode sheath can reduce ion losses to the wall if positioned near the anode (outside the dense region of the plasma) such that an ion-repelling sheath
S. Langendorf, K. Xu, M. Walker
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Plasma diagnostic systems for Hall-effect plasma thrusters

Plasma Physics and Controlled Fusion, 2000
A joint programme, involving research laboratories from CNRS (Centre National de le Recherche Scientifique) and ONERA (Office National de Recherches Aerospatiales), was developed in France in connection with the French Space Agency (CNES) and industry (SNECMA) for the understanding of Hall-effect plasma thrusters.
M Touzeau, M Prioul, S Roche, N Gascon, C Pérot, F Darnon, S Béchu, C Philippe-Kadlec, L Magne, P Lasgorceix, D Pagnon, A Bouchoule, M Dudeck   +12 more
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Effect of Anode Temperature on Hall Thruster Performance

Journal of Propulsion and Power, 2010
The effects of anode temperature on the performance of a 5-kW Hall-effect thruster are investigated. The performance characteristics of the P5 Hall-effect thruster are measured with and without active cooling of the anode. Thrust, ion current density, anode temperature, and cooling power are measured for discharge voltages between 100 and 500 V at ...
Carl F. Book, Mitchell L. R. Walker
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Optimized atom injection in a Hall effect thruster

Applied Physics Letters, 2004
An improvement of the neutral gas injection in order to increase the Hall thruster lifetime capabilities is demonstrated using a two-dimensional model. An additional atom injection through the channel ceramics in a region located between the ionization and the acceleration zones leads to an efficient ionization of the neutral flux, with a flattening of
L. Garrigues, G. J. M. Hagelaar, C. Boniface, J. P. Boeuf   +3 more
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Finite Pressure Effects in Magnetically Shielded Hall Thrusters

50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 2014
We describe the effects of finite pressure in a large vacuum facility on a magnetically shielded Hall thruster using internally and externally mounted cathodes. A numerical model of the pumping system was first used to guide the placement of an ionization gauge and an auxiliary propellant injector used for increasing the backpressure.
Richard R. Hofer, John R. Anderson
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Scaling Approach for Sub-Kilowatt Hall-Effect Thrusters

Journal of Propulsion and Power, 2019
Properly determining the size and predicting the performance of a Hall-effect thruster (HET) is an essential process in the early phase of thruster design.
Eunkwang Lee, Younho Kim, Hodong Lee, Holak Kim, Guentae Doh, Dongho Lee, Wonho Choe   +6 more
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Hall Effect Thruster with an AlN Chamber

AIP Conference Proceedings, 2006
The potential of AlN as a material for Hall thruster channels is assessed on the basis of actual thruster performances, computer simulations of the discharge and microscopy studies of an eroded channel. Comparison of experimental and numerical data provides further evidence that secondary electron emission (SEE) is the main phenomena responsible for ...
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Study on Similarity Criteria of Hall Effect Thrusters

Contributions to Plasma Physics, 2009
AbstractThe scaling design of Hall effect thrusters is based on similarity criteria. Up to now, few of the similarity criteria proposed concern about the inside physical processes of the thruster except Melikov‐Morozov similarity criterion which embodies the ionization of propellant. As many other significant processes, such as electron conduction, ion
Y.J. Ding, D.R. Yu, H. Li, Z.X. Ning, D.C. Jia   +4 more
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Innovative low power Hall Effect Thruster

36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, 2000
Christopher McLean, John McVey, Christian Lazarovici, Edward Britt   +3 more
openaire   +1 more source