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Modélisation et diagnostic d'un propulseur à effet Hall pour satellites : configuration magnétique et nouveaux concepts.

Abstract : Hall Effect Thrusters (HETs) are gridless ion engines where a magnetic field barrier is used to impede the electron motion toward the anode and generate a large electric field that provides collisionless ion acceleration. The thrust is about 100 mN and the specific impulse of HETs is in the range 1600-2000 s (i.e. the velocity of ejected xenon ions is on the order of 16-20 km/s). The thrust and the specific impulse of standard Single Stage HETs are well adapted to the missions of orbit correction and station keeping

The goal here is to model the physical phenomena occurring in such a thruster, and, in correlation with experimental studies, to validate and/or improve the assumptions of the model. The model describes the transport of the electrons, ions, and neutrals in crossed electric and magnetic fields. The model developed at CPAT was extended and used to identify conditions for optimal operation of the thruster, with particular attention to the influence of the magnetic field distribution on the thruster operation. In addition, we developed a model to study new thuster concepts such as a Double Stage Hall Effect Thruster, where ionization and acceleration are accomplished in two stages.
The experimental study involved using specific plasma diagnostics (Fabry-Perot Interferometry) in order to measure the electric field distribution in the thruster. Measurements were made at the PIVOINE test facility in Orléans. Systematic comparisons between experimental results and simulations allowed us to define more clearly the limits of the model and to improve its predictive ability.
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https://tel.archives-ouvertes.fr/tel-00164160
Contributor : Claude Boniface <>
Submitted on : Thursday, July 19, 2007 - 3:40:24 PM
Last modification on : Monday, October 19, 2020 - 11:01:56 AM
Long-term archiving on: : Friday, November 25, 2016 - 6:23:03 PM

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Claude Boniface. Modélisation et diagnostic d'un propulseur à effet Hall pour satellites : configuration magnétique et nouveaux concepts.. Dynamique des Fluides [physics.flu-dyn]. Université Paul Sabatier - Toulouse III, 2006. Français. ⟨tel-00164160⟩

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