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Experimentally determined plasma parameters in a 30 cm ion engine

Show simple item record Sengupta, Anita Goebel, Dan Fitzgerald, Dennis Owens, Al Tynan, George Dorner, Russ 2006-11-28T19:40:36Z 2006-11-28T19:40:36Z 2004-07-11
dc.identifier.citation 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Fort Lauderdale, Florida, July 11-14, 2004. en
dc.identifier.clearanceno 04-2168
dc.description.abstract Single planar Langmuir probes and fiber optic probes are used to concurrently measure the plasma properties and neutral density variation in a 30cm diameter ion engine discharge chamber, from the immediate vicinity of the keeper to the near grid plasma region. The fiber optic probe consists of a collimated optical fiber recessed into a double bore ceramic tube fitted with a stainless steel light-limiting window. The optical fiber probe is used to measure the emission intensity of excited neutral xenon for a small volume of plasma, at various radial and axial locations. The single Langmuir probes, are used to generate current-voltage characteristics at a total of 140 spatial locations inside the discharge &amber. Assuming a maxwellian distribution for the electron population, the Langmuir probe traces provide spatially resolved measurements of plasma potential, electron temperature, and plasma density. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 4544112 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2004. en
dc.subject ion engines en
dc.subject optical fiber plasma en
dc.subject near grid plasma en
dc.title Experimentally determined plasma parameters in a 30 cm ion engine en
dc.type Preprint en

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