Investigation of Operation and Characteristics of Small SPT with Discharge Chamber Walls made of Different Ceramics

Kim, Vladimir; Козлов, В. І.; Skrylnikov, Alexander; Veselovzorov, A. N.; Fife, J. M.; Locke, Summer

doi:10.2514/6.2003-5002

Cited by 4 publications

(1 citation statement)

References 1 publication

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“…Understanding of wall sheath physics in Hall thrusters has been considerably advanced in the last several years and continues to be the subject of research [20][21][22][23][24][25][26][27][28][29]. The complexity of the physics and the uncertainty in key physical parameters (e.g., the secondary electron emission yield [16,17,20,[29][30][31][32]) has resulted in several models being proposed that can differ substantially in their assumptions and results. While presently there is a dearth of consensus on an appropriate model, the model proposed by Ahedo in Ref.…”

Section: Wall Sheath Modelingmentioning

confidence: 99%

Wall Sheath and Electron Mobility Modeling in Hybrid-PIC Hall Thruster Simulations

Hofer¹,

Mikellides²,

Katz³

et al. 2007

43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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Progress on the development of physics-based modeling tools aimed at predicting the service life of Hall thrusters is discussed. Modifications of the wall sheath and electron mobility models in the hybrid fluid/particle-in-cell computer code HPHall-2 are made and the effects of these changes on the plasma parameters and thruster performance are assessed. The wall sheath model of Hobbs and Wesson [Plasma Physics, 9, 85-87 (1967)] has been adopted, resulting in modifications to the predicted sheath potentials that are relevant to the modeling of high specific impulse Hall thrusters. Experiments with a widely used mixed-mobility model of the cross-field electron transport is presented that enables the simultaneous prediction of thrust and discharge current in agreement with experimental data. Taken together, these code modifications have improved the predictive capability of HPHALL-2 to serve as an input for studies of Hall thruster erosion.

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Section: Wall Sheath Modelingmentioning

confidence: 99%

Wall Sheath and Electron Mobility Modeling in Hybrid-PIC Hall Thruster Simulations

Hofer¹,

Mikellides²,

Katz³

et al. 2007

43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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Investigation of discharge channel wall material influence on lifetime of hall effect thruster with high specific impulse

Abashkin

Belikov

Gorshkov

et al. 2011

Progress in Propulsion Physics

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Results of 500-hour life tests of the 900-watt Hall-thruster laboratory model with the speci¦c impulse of 2000 s are presented. The thruster discharge channel walls were manufactured from 60% BN + 40% SiO 2 and > 90% BN hot-pressed ceramics. The predicted total lifetime was ∼ 3000 h for both wall materials in spite of greater erosion resistance of pure BN in comparison with BN SiO 2 mixture. To clarify the accompanying phenomena, the following diagnostics were carried out. The surface microstructure and composition insulators were investigated by means of electron microscopy and X-ray §uorescence analysis and nearwall plasma parameters were measured with §at Langmuir probes. The obtained distributions of plasma parameters were compared with the results of stationary one-dimensional (1D) hydrodynamic modeling of discharge channel.

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Hall Effect Thruster with an AlN Chamber

Barral¹,

Jayet²,

Véron³

et al. 2006

AIP Conference Proceedings

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Investigation of Operation and Characteristics of Small SPT with Discharge Chamber Walls made of Different Ceramics

Cited by 4 publications

References 1 publication

Wall Sheath and Electron Mobility Modeling in Hybrid-PIC Hall Thruster Simulations

Wall Sheath and Electron Mobility Modeling in Hybrid-PIC Hall Thruster Simulations

Investigation of discharge channel wall material influence on lifetime of hall effect thruster with high specific impulse

Hall Effect Thruster with an AlN Chamber

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