The T6 High Power Electric Propulsion System (HPEPS) from QinetiQ was selected in September 2004 as the most promising candidate for a future high-power electric propulsion solution for north-south station keeping on the AlphaBus extended range. Full development and qualification is now underway.
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 Xenon Flow Control Unit
 Standard Accuracy Pressure Transducer
[TBD] Propellant Filter
[TBD] Flow Restrictor
[TBD] Proportional Micro Thruster/Flow Control Valve