Results 251 to 260 of about 1,081 (308)

Snapshots from a Fast‐Moving Train: Religious History 1960–2025

Journal of Religious History, EarlyView.
Alexandra Walsham
wiley   +1 more source

Development of a Magnesium and Zinc Hall-Effect Thruster

Journal of Propulsion and Power, 2010
§This paper describes what are believed to be the first demonstrations of Hall-effect thrusters operating on magnesium and zinc propellant. Pathfinding experiments were performed using consumable anodes that were machined from solid magnesium and zinc, which sublimated under the heat load from the discharge plasma and delivered propellant gas to the ...
Jason M. Makela, Robert L. Washeleski, Dean R. Massey, Lyon B. King, Mark A. Hopkins   +4 more
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Kinetic Effects in Hall Thruster Discharge

42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2006
Recent 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, Y. Raitses, D. Sydorenko, A. Smolyakov   +3 more
openaire   +1 more source

Analysis of Airbreathing Hall-Effect Thrusters

Journal of Propulsion and Power, 2011
The 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
openaire   +1 more source

Electron Transport Modeling in Hall-Effect Thrusters

42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2006
One of the most interesting phenomena in Hall-effect thrusters is the anomalous electron transport. Experimental investigations show that the electron transport coefficient along the thruster axis direction is much greater than the electron transport coefficient that we obtain through the classical electron-transport model.
DE MARCO E. A, ANDRENUCCI, MARIANO
openaire   +2 more sources

Physics, simulation and diagnostics of Hall effect thrusters

Plasma Physics and Controlled Fusion, 2008
This paper presents recent efforts to better understand and quantify charged particle transport in Hall effect thrusters (HETs). Particle-in-cell (PIC) models, hybrid models, laser induced fluorescence (LIF) measurements and collective scattering (CS) experiments are combined to get a better insight into anomalous electron transport in HETs and to ...
Adam, J.C., Boeuf, Jean-Pierre, Dubuit, Nicolas, Dudeck, M., Garrigues, Laurent, Gresillon, D., Heron, A., Hagelaar, Gerjan, Kulaev, V., Lemoine, N., Mazouffre, S., Perez-Luna, J., Pisarev, V., Tsikata, S.   +13 more
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Non-invasive Hall current distribution measurement in a Hall effect thruster

Review of Scientific Instruments, 2015
A means is presented to determine the Hall current density distribution in a closed drift thruster by remotely measuring the magnetic field and solving the inverse problem for the current density. The magnetic field was measured by employing an array of eight tunneling magnetoresistive (TMR) sensors capable of milligauss sensitivity when placed in a ...
Carl R, Mullins, Casey C, Farnell, Cody C, Farnell, Rafael A, Martinez, David, Liu, Richard D, Branam, John D, Williams   +6 more
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Hall Effect on the Magnetoplasmadynamic Thruster Flowfields

38th Plasmadynamics and Lasers Conference, 2007
The influence of the Hall effect on the current distribution and the plasma flow is investigated using two-dimensional numerical simulation for a self-field MagnetoPlasmaDynamic (MPD) thruster consisting of a short cathode and a flared anode. We focus on the analysis of transitional behaviors between electrothermal and electromagnetic acceleration ...
Kenichi Kubota, Ikkoh Funaki, Yoshihiro Okuno   +2 more
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Kinetic effects in hall plasma thrusters

2010 Abstracts IEEE International Conference on Plasma Science, 2010
The plasma-wall interaction in the presence of strong secondary electron or thermionic emission has been studied theoretically and experimentally both as a basic phenomenon and in relation to numerous plasma applications such as, for example, fusion devices and plasma propulsion. For Hall thrusters, existing fluid models predict that secondary electron
Yevgeny Raitses, Igor Kaganovich, Alexander Khrabrov, Leonid A. Dorf, Nathaniel J. Fisch, Dmytro Sydorenko, Andrei Smolyakov   +6 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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