Optimization of the PPS®X000-Technological Demonstrator for high Isp operation

Hall thrusters, widely investigated since the 60’s, have proven high reliability as propulsive system on board geostationary satellites. Numerous characterization studies have demonstrated their aptitude to operate efficiently on a wide operating domain covering the so-called High Thrust mode as well as High Specific Impulse mode. Specific impulse (Isp) is a significant parameter for choosing a propulsive system since it illustrates a low propellant consumption. Given that satellite station keeping is required during all the satellite lifetime optimization of High Isp mode is of interest for mass saving concerns. This paper aims at identifying the most critical parameters linked to that operating mode and at listing the design modifications to be implemented on the technological demonstrator of the PPS®5000 in terms of materials, architecture and magnetic configuration for an optimized High Isp operating mode.