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Numerical Studies of Hall Thruster Acceleration Region Electron Transport

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dc.contributor.author Katz, Ira
dc.contributor.author Chaplin, Vernon H. Jr.
dc.contributor.author Ortega, Alejandro Lopez
dc.date.accessioned 2020-05-12T17:15:54Z
dc.date.available 2020-05-12T17:15:54Z
dc.date.issued 2018-07-09
dc.identifier.citation 2018 AIAA Propulsion and Energy Forum, Cincinnati, Ohio, July 9 - 11, 2018 en_US
dc.identifier.clearanceno 18-2866
dc.identifier.uri http://hdl.handle.net/2014/48360
dc.description.abstract Azimuthal direction 1-D and azimuthal and axial direction 2-D Particle in Cell (PIC) simulations of the Hall thruster acceleration and near-plume regions are presented. The axial extent of the 2-D computational domain is based on the ExB drift parameter, 𝑫𝑬𝒙𝑩, the number of times around the channel an electron ExB drifts before being scattered. With only high energy main beam ions, the simulations produced a broad potential profile in the acceleration region. The addition of a small amount of ionization in the acceleration domain at a rate consistent with Hall thruster parameters causes the potential profile to develop two distinct regions. In the upstream portion of the computational domain, the potential profile is very steep, typical of Hall thruster acceleration regions. In the downstream portion, the potential profile is almost flat, like potentials in Hall thruster near plume regions. This bifurcation happens naturally; there is no other change in code parameters between the two results. Without the addition of a small amount of ionization in the acceleration region, the axial electron transport is very low. With ionization, the calculated ratio of electron current to ion current is the same order of those measured in Hall thrusters. This suggests that in regions with lower energy electrons and ions, plasma waves are effective in allowing crossfield transport, and axial electric fields are small. In the acceleration region, the plasma waves are less effective at scattering the energetic electrons, and high axial electric fields are needed to produce the observed cross-field electron transport. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2018 en_US
dc.title Numerical Studies of Hall Thruster Acceleration Region Electron Transport en_US
dc.type Preprint en_US


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