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- W312462158 abstract "A two-dimensional particle-in-cell (PIC) code, incorporating three-dimensional Monte Carlo collisions, has been developed for simulation of the helicon double layer thruster (HDLT). A 2D code was developed to help resolve the importance of the parts played by the external magnetic field, radio-frequency (rf) antenna, and wall charging effects within the source, in the formation of a current-free double layer, as observed in previous experiments. The simulation makes use of an unstructured mesh based on triangular grid elements obtained from a Delaunay triangulation, and its Voronoi dual, to produce a finite volume code. This approach was adopted in order to be able to accurately and easily simulate more complicated geometries, such as an annular HDLT configuration, currently being pursued. A mesh density distribution has been incorporated, allowing smaller mesh elements to be used in the higher density regions of the HDLT system. All parameters of the HDLT experiments have been incorporated into the simulation, including: system geometry, external magnetic field, rf antenna geometry and input power, neutral gas pressure, and boundary conditions. The external magnetic field, (and heating antenna), has been modeled as a finite thickness, finite length, cylindrical shell, and solved semi-numerically from the vector potential. The modeled magnetic field shows good correlation with the measured field within the HDLT. In the near-field approximation, the temporal variation of the antenna heating field separates, thus allowing the spatial variation to be evaluated once at the grid point locations, outside of the simulation time steps." @default.
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- W312462158 date "2008-09-29" @default.
- W312462158 modified "2023-09-28" @default.
- W312462158 title "Development of a 2D PIC Simulation for the HDLT" @default.
- W312462158 hasPublicationYear "2008" @default.
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