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Towards the identification of the Keeper Erosion Cause(s) : numerical simulations of the Plasma and Neutral Gas using the Global Cathode Model OrCa2D-II.

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dc.contributor.author Mikellides, Ioannis G.
dc.contributor.author Katz, Ira
dc.contributor.author Goebel, Dan M.
dc.contributor.author Jameson, Kristina K.
dc.date.accessioned 2006-08-24T21:18:13Z
dc.date.available 2006-08-24T21:18:13Z
dc.date.issued 2006-07-09
dc.identifier.citation 42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Sacramento, California, July 9-12, 2006 en
dc.identifier.clearanceno 06-1814
dc.identifier.uri http://hdl.handle.net/2014/39737
dc.description.abstract Numerical simulations with the time-dependent Orificed Cathode (OrCa2D-II) computer code show that classical enhancements of the plasma resistivity can not account for the elevated electron temperatures and steep plasma potential gradients measured in the plume of a 25-27.5 A discharge hollow cathode. The cathode, which employs a 0.11-in diameter orifice, was operated at 5.5 sccm without an applied magnetic field using two different anode geometries. It is found that anomalous resistivity based on electron-driven instabilities improves the comparison between theory and experiment. It is also estimated that other effects such as the Hall-effect from the self-induced magnetic field, not presently included in OrCa2D-II, may contribute to the constriction of the current density streamlines thus explaining the higher plasma densities observed along the centerline. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 563614 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2006. en
dc.relation.ispartofseries AIAA en
dc.relation.ispartofseries 2006-5151 en
dc.subject hollow cathode en
dc.subject plasma modeling en
dc.subject lifetime modeling en
dc.title Towards the identification of the Keeper Erosion Cause(s) : numerical simulations of the Plasma and Neutral Gas using the Global Cathode Model OrCa2D-II. en
dc.type Preprint en


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