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Pulsed plasmoid electric propulsionA method of electric propulsion is explored where plasmoids such as spheromaks and field reversed configurations (FRC) are formed and then allowed to expand down a diverging conducting shell. The plasmoids contain a toroidal electric current that provides both heating and a confining magnetic field. They are free to translate because there are no externally supplied magnetic fields that would restrict motion. Image currents in the diverging conducting shell keep the plasmoids from contacting the wall. Because these currents translate relative to the wall, losses due to magnetic flux diffusion into the wall are minimized. During the expansion of the plasma in the diverging cone, both the inductive and thermal plasma energy are converted to directed kinetic energy producing thrust. Specific impulses can be in the 4000 to 20000 sec range with thrusts from 0.1 to 1000 Newtons, depending on available power.
Document ID
19910012838
Document Type
Conference Paper
Authors
Bourque, Robert F. (General Atomics Co. San Diego, CA, United States)
Parks, Paul B. (General Atomics Co. San Diego, CA, United States)
Tamano, Teruo (General Atomics Co. San Diego, CA, United States)
Date Acquired
September 6, 2013
Publication Date
April 1, 1990
Publication Information
Publication: NASA. Lewis Research Center, Vision-21: Space Travel for the Next Millennium
Subject Category
SPACECRAFT PROPULSION AND POWER
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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NameType 19910012838.pdf STI