Abstract
A hybrid-PIC DSMC Hall thruster plume simulation on unstructured grids called AQUILA has been developed to work within the framework of the Air Force’s COLISEUM. Continuing work has seen the addition of a Poisson solver for the nonquasineutral plume regions, allowing for more accurate results in low density areas of the plasma. A switch has been implemented that self-consistently determines which regions of the plume need to be solved with the Poisson solver and which regions can be assumed quasineutral. Improved current density results are garnered from better unstructured grid resolution. The importance of the effect of a background neutral density is investigated in terms of charge exchange wing formation, non-neutral regions of the plume, and deposition of foreign material emitted by the thruster on an object behind a shadow shield.
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