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Numerical simulation of two-grid ion optics using a 3D code

Show simple item record Anderson, John R. Katz, Ira Goebel, Dan 2006-11-28T19:38:43Z 2006-11-28T19:38:43Z 2004-07-11
dc.identifier.citation 40th AIAA Joint Propulsion Conference, Fort Lauderdale, Florida, July 12-14, 2004 en
dc.identifier.clearanceno 04-2156
dc.description.abstract A three-dimensional ion optics code has been developed under NASA’s Project Prometheus to model two grid ion optics systems. The code computes the flow of positive ions from the discharge chamber through the ion optics and into the beam downstream of the thruster. The rate at which beam ions interact with background neutral gas to form charge exchange ions is also computed. Charge exchange ion trajectories are computed to determine where they strike the ion optics grid surfaces and to determine the extent of sputter erosion they cause. The code has been used to compute predictions of the erosion pattern and wear rate on the NSTAR ion optics system; the code predicts the shape of the eroded pattern but overestimates the initial wear rate by about 50%. An example of use of the code to estimate the NEXIS thruster accelerator grid life is also presented. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 3541543 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 optics en
dc.subject simulation codes en
dc.title Numerical simulation of two-grid ion optics using a 3D code en
dc.type Preprint en

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