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Ion Current Density Study of the NASA-300M and NASA-457Mv2 Hall ThrustersNASA Glenn Research Center is developing a Hall thruster in the 15-50 kW range to support future NASA missions. As a part of the process, the performance and plume characteristics of the NASA-300M, a 20-kW Hall thruster, and the NASA-457Mv2, a 50-kW Hall thruster, were evaluated. The collected data will be used to improve the fidelity of the JPL modeling tool, Hall2De, which will then be used to aid the design of the 15-50 kW Hall thruster. This paper gives a detailed overview of the Faraday probe portion of the plume characterization study. The Faraday probe in this study is a near-field probe swept radially at many axial locations downstream of the thruster exit plane. Threshold-based integration limits with threshold values of 1/e, 1/e(sup 2), and 1/e(sup 3) times the local peak current density are tried for the purpose of ion current integration and divergence angle calculation. The NASA-300M is operated at 7 conditions and the NASA-457Mv2 at 14 conditions. These conditions span discharge voltages of 200 to 500 V and discharge power of 10 to 50 kW. The ion current density profiles of the near-field plume originating from the discharge channel are discovered to strongly resemble Gaussian distributions. A novel analysis approach involving a form of ray tracing is used to determine an effective point of origin for the near-field plume. In the process of performing this analysis, definitive evidence is discovered that showed the near-field plume is bending towards the thruster centerline.
Document ID
Document Type
Conference Paper
Huang, Wensheng
(NASA Glenn Research Center Cleveland, OH, United States)
Shastry, Rohit
(NASA Glenn Research Center Cleveland, OH, United States)
Herman, Daniel A.
(NASA Glenn Research Center Cleveland, OH, United States)
Soulas, George C.
(NASA Glenn Research Center Cleveland, OH, United States)
Kamhawi, Hani
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 26, 2013
Publication Date
July 29, 2012
Subject Category
Spacecraft Propulsion And Power
Report/Patent Number
AIAA Paper 2012-3870
Meeting Information
Meeting: 48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
Location: Atlanta, GA
Country: United States
Start Date: July 30, 2012
End Date: August 1, 2012
Sponsors: Society of Automotive Engineers, Inc., American Society of Mechanical Engineers, American Society for Electrical Engineers, American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 182603.01.04.02
Distribution Limits
Work of the US Gov. Public Use Permitted.
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