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Low Frequency Plasma Oscillations in a 6-kW Magnetically Shielded Hall ThrusterThe oscillations from 0-100 kHz in a 6-kW magnetically shielded thruster are experimen- tally characterized. Changes in plasma parameters that result from the magnetic shielding of Hall thrusters have the potential to significantly alter thruster transients. A detailed investigation of the resulting oscillations is necessary both for the purpose of determin- ing the underlying physical processes governing time-dependent behavior in magnetically shielded thrusters as well as for improving thruster models. In this investigation, a high speed camera and a translating ion saturation probe are employed to examine the spatial extent and nature of oscillations from 0-100 kHz in the H6MS thruster. Two modes are identified at 8 kHz and 75-90 kHz. The low frequency mode is azimuthally uniform across the thruster face while the high frequency oscillation is concentrated close to the thruster centerline with an m = 1 azimuthal dependence. These experimental results are discussed in the context of wave theory as well as published observations from an unshielded variant of the H6MS thruster.
Document ID
20150008023
Document Type
Conference Paper
External Source(s)
Authors
Jorns, Benjamin A. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hofery, Richard R. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
May 12, 2015
Publication Date
July 14, 2013
Subject Category
Spacecraft Propulsion and Power
Meeting Information
AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit(San Jose, CA)
Distribution Limits
Public
Copyright
Other
Keywords
BPT-4000
channel erosion