Results 271 to 280 of about 2,675 (308)

Tutorial: Physics and modeling of Hall thrusters

Journal of Applied Physics, 2017
Hall 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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A laboratory-scale Hall thruster

31st Joint Propulsion Conference and Exhibit, 1995
Anticipating 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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Thermal model of Hall thruster

High Power Laser and Particle Beams, 2014
To provide energy loss loading conditions for the thermal analysis of Hall thruster, a thermal model of Hall thruster is developed. Based on the plasma theory, the mechanism of various energy losses in discharge chamber is analyzed, and related functions are established between these energy losses and operation, performance parameters and structural ...
龙建飞 Long Jianfei, 孙明明 Sun Mingming, 张天平 Zhang Tianping, 吴先明 Wu Xianming   +3 more
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Conducting Wall Hall Thrusters

49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 2013
A 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, Richard R. Hofer, Ioannis G. Mikellides, Ira Katz   +3 more
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On Scaling of Hall Effect Thrusters

IEEE Transactions on Plasma Science, 2015
The field of application of Hall effect thrusters (HETs) is constantly expanding toward increased power and specific impulse and also toward reduced power. The modern level of plasma simulations does not allow accurate prediction of a thruster performance in advance.
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Computation of Hall Thruster Performance

Journal of Propulsion and Power, 2001
A quasi-neutral one-dimensional hybrid model of a stationary plasma thruster has been used to predict the performance of a laboratory model thruster tested in the Propulsion Ionique pour Vols Orbitaux, Interpretation et Nouvelles Experiences, facility. In this model ions are treated as particles and electrons as a  uid and quasi neutrality is assumed ...
L. Garrigues, I. D. Boyd, J. P. Boeuf
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Hall thruster with grooved walls

Journal of Applied Physics, 2013
Axial-oriented and azimuthal-distributed grooves are formed on channel walls of a Hall thruster after the engine undergoes a long-term operation. Existing studies have demonstrated the relation between the grooves and the near-wall physics, such as sheath and electron near-wall transport.
Hong Li, Zhongxi Ning, Daren Yu
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Improved Hall type thruster

AIP Conference Proceedings, 1995
An improved design of the Hall type stationary plasma thruster has been tested in 1994. The test results are presented. The test measures performance, EMI and beam divergence of two models of thrusters from the Russian Keldysh Scientific‐Research Institute of Thermal Processes.
Joseph R. Wetch, null See-pok Wong, Edward J. Britt, Kevin J. McCracken, Raymond Lin, Valeri Petrosov, Anatoli Koroteev   +6 more
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Performance calculation of Hall thrusters

Acta Astronautica, 1996
Abstract Plasma flows in a Hall thruster are numerically analyzed by using a 2-D calculation code, and the thruster performance is estimated for several thruster configurations. The model presented herein is mainly comprised of an electron diffusion equation, an ion kinetic equation, and an energy conservation equation, which enables one to compute ...
Kimiya Komurasaki, Yoshihiro Arakawa
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Ion Current in Hall Thrusters

IEEE Transactions on Plasma Science, 2008
To match the observed thrust and discharge current in Hall thrusters, computer simulations have typically assumed anomalous electron transport mechanisms, such as Bohm diffusion, to enhance electron mobility across magnetic field lines. Without enhanced electron transport, the simulations predict a much lower discharge current than observed, and too ...
Ira Katz, Richard R. Hofer, Dan M. Goebel   +2 more
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