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Power Dependence of the Electron Mobility Profile in a Hall ThrusterThe electron mobility profile is estimated in a 4.5 kW commercial Hall thruster as a function of discharge power. Internal measurements of plasma potential and electron temperature are made in the thruster channel with a high-speed translating probe. These measurements are presented for a range of throttling conditions from 150 - 400 V and 0.6 - 4.5 kW. The fluid-based solver, Hall2De, is used in conjunction with these internal plasma parameters to estimate the anomalous collision frequency profile at fixed voltage, 300 V, and three power levels. It is found that the anomalous collision frequency profile does not change significantly upstream of the location of the magnetic field peak but that the extent and magnitude of the anomalous collision frequency downstream of the magnetic peak does change with thruster power. These results are discussed in the context of developing phenomenological models for how the collision frequency profile depends on thruster operating conditions.
Document ID
20160008253
Document Type
Conference Paper
External Source(s)
Authors
Jorns, Benjamin A. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hofery, Richard H. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Mikellides, Ioannis G. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
July 1, 2016
Publication Date
July 28, 2014
Subject Category
Spacecraft Propulsion and Power
Meeting Information
AIAA/ASME/SAE/ASEE Joint Propulsion Conference (JPC)(Cleveland, OH)
Distribution Limits
Public
Copyright
Other