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Record Details

Record 1 of 44819
Low Frequency Plasma Oscillations in a 6-kW Magnetically Shielded Hall Thruster
External Online Source: hdl:2014/44401
Author and Affiliation:
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)
Abstract: The 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.
Publication Date: Jul 14, 2013
Document ID:
20150008023
(Acquired May 18, 2015)
Subject Category: SPACECRAFT PROPULSION AND POWER
Document Type: Conference Paper
Meeting Information: AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit; 49th; 14-17 Jul. 2013; San Jose, CA; United States
Meeting Sponsor: American Inst. of Aeronautics and Astronautics; Los Angeles, CA, United States
American Society of Mechanical Engineers; Naperville, IL, United States
Society of Automotive Engineers, Inc.; Warrendale, PA, United States
American Society for Engineering Education; Urbana, IL, United States
Financial Sponsor: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
Description: 19p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: PLASMA OSCILLATIONS; LOW FREQUENCIES; HALL THRUSTERS; MAGNETIC SHIELDING; TIME DEPENDENCE; AZIMUTH; HIGH FREQUENCIES; HIGH SPEED CAMERAS; ELECTRIC PROPULSION
Other Descriptors: CHANNEL EROSION; BPT-4000
Availability Source: Other Sources
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