Micropropulsion Technologies for the European High-Precision Formation Flying Interferometer DARWIN

Computer Science – Performance

Scientific paper

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Scientific paper

The ESA mission DARWIN is a formation flying interferometer with high demands on precise relative positioning between the spacecraft. Due to lack of alternatives, the micropropulsion system of choice has persistently been Field-Emission Electric Propulsion. In recent years many other micropropulsion technologies have started to emerge, and these were evaluated for their suitability to DARWIN. It was found that the concept of Cold Gas Microthrusters with internal heating introduces several advantages, albeit drawbacks are the poor performance and low maturity. Nevertheless, with the baseline Ariane-5 launcher configuration the penalties in propellant mass and volume should be acceptable, making Cold Gas Microthrusters a feasible and less risky propulsion option.

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