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Development of Advanced Hall Plume Models
Final technical rept. 1 Jan 2004-31 Dec 2005
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF AERONAUTICS AND ASTRONAUTICS
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The purpose of this work was twofold a To develop numerical or analytical methods capable of dealing with the combination of three-dimensionality and strong anisotropy that occurs in the plume region near the exit of a Hall thruster, and b To explore the use of fluid-based models in plume computations, so as to overcome the granularity associated with normal particle-based approaches. In area a we have carefully formulated the 3D near-plume problem using a combination of heavy particle tracking and magnetized electron fluid equations, and have to a large extent clarified the structure of the solutions, such that numerical implementation should be greatly facilitated. In area b we have concentrated on an examination of the far-field of the plume, where the geomagnetic field takes over the dynamics. Again, only a formulation and a suggested method for numerical implementation were completed. Two graduate Theses are still in progress in these two areas, and we expect to issue a supplementary report when they are finalized.
APPROVED FOR PUBLIC RELEASE