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Record Details

Record 66 of 18021
The flexible magnetic field thruster
Author and Affiliation:
Brophy, J. R.(Colorado State Univ., Fort Collins, CO, United States)
Wilbur, P. J.(Colorado State University, Fort Collins, CO, United States)
Abstract: The thruster is designed so that ion currents to various internal surfaces can be measured directly; these measurements facilitate calculations of the distribution of ion currents inside the discharge chamber. Experiments are described suggesting that the distribution of ion currents inside the discharge chamber is strongly dependent on the shape and strength of the magnetic field but independent of the discharge current, discharge voltage, and neutral flow rate. Measurements of the energy cost per plasma ion suggest that this cost decreases with increasing magnetic field strength as a consequence of increased anode shielding from the primary electrons. Energy costs per argon plasma ion as low as 50 eV are measured. The energy cost per beam ion is found to be a function of the energy cost per plasma ion, extracted ion fraction, and discharge voltage. Part of the energy cost per beam ion has to do with creating many ions in the plasma and then extracting only a fraction of them into the beam. The balance of the energy goes into accelerating the remaining plasma ions into the walls of the discharge chamber.
Publication Date: Nov 01, 1982
Document ID:
19830031335
(Acquired Nov 30, 1995)
Accession Number: 83A12553
Subject Category: SPACECRAFT PROPULSION AND POWER
Report/Patent Number: AIAA PAPER 82-1936
Document Type: Conference Paper
Publisher Information: United States
Meeting Information: Japan Society for Aeronautical and Space Sciences, and DGLR, International Electric Propulsion Conference; 16th; Nov. 17-19, 1982; New Orleans, LA
Meeting Sponsor: AIAA
Contract/Grant/Task Num: NGR-06-002-112
Financial Sponsor: NASA; United States
Organization Source: Colorado State Univ.; Fort Collins, CO, United States
Description: 10p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ELECTROMAGNETIC PROPULSION; ELECTRON BOMBARDMENT; ION PROPULSION; MAGNETIC FIELD CONFIGURATIONS; PROPULSION SYSTEM PERFORMANCE; COST ANALYSIS; CURRENT DISTRIBUTION; ION CURRENTS; ION PRODUCTION RATES; MAGNETIC FLUX; PROPULSION SYSTEM CONFIGURATIONS; THRUST CHAMBERS
Imprint And Other Notes: AIAA, Japan Society for Aeronautical and Space Sciences, and DGLR, International Electric Propulsion Conference, 16th, New Orleans, LA, Nov. 17-19, 1982, AIAA 10 p.
Availability Source: Other Sources
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