By a News Reporter-Staff News Editor at Defense & Aerospace Week -- Research findings on Propulsion and Power are discussed in a new report. According to news reporting from Ann Arbor, Michigan, by VerticalNews journalists, research stated, "This paper presents the results of a two-axis laser-induced fluorescence velocimetry study of singly charged xenon in the interior and near the channel walls of the H6 Hall thruster. The thruster has a nominal operating discharge power of 6 kW and has been operated for similar to 330 h before testing."
The news correspondents obtained a quote from the research from the University of Michigan, "It is operated under seven conditions spanning discharge voltages of 150-600 V and anode mass flow rates of 10-30 m g/s. The mean velocity of the near-wall ion populations varies from 0.5 to 25 k m /s with an angle of incidence relative to the wall surface that varies from 30 to 80 deg. In general, the mean velocity and angle of incidence are strongly correlated with the discharge voltage and weakly correlated with the anode mass flow rate. There is strong correlation between the axial locations where high energy (greater than a few tens of electron volts) ions exist and where erosion is discernible in the channel profile. This evidence supports the notion that erosion is negligible below a certain energy threshold."
According to the news reporters, the research concluded: "Potential application of this velocimetry technique for qualitative analysis of Hall thruster channel wall lifetime is also discussed."
For more information on this research see: Interior and Near-Wall Ion Velocity Distribution Functions in the H6 Hall Thruster. Journal of Propulsion and Power, 2013;29(5):1146-1154. Journal of Propulsion and Power can be contacted at: Amer Inst Aeronautics Astronautics, 1801 Alexander Bell Drive, Ste 500, Reston, VA 22091-4344, USA.
Our news journalists report that additional information may be obtained by contacting W.S. Huang, University of Michigan, Plasmadynam & Elect Prop Lab, Ann Arbor, MI 48109, United States. Additional authors for this research include A.D. Gallimore and T.B. Smith.
Keywords for this news article include: Michigan, Ann Arbor, United States, Propulsion and Power, North and Central America
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