QUALIFICATION STATUS OF THE FIELD-EMISSION ELECTRIC PROPULSION (FEEP) SYSTEMS NANO R³ AND MICRO R³ – 13 May 2022

Authors: Tony Schönherr, Lou Grimaud, Torsten Vogel, David Krejci, Alexander Reissner, Bernhard Seifert

Published On: 09 – 13 MAY 2022

Event: SPACE PROPULSION 2022, ESTORIL PORTUGAL, SP2022-192

Abstract

Field-emission electric propulsion (FEEPs) as part of the electrostatic propulsion family are low-thrust, high-Isp subsystems suitable for various mission applications on satellites ranging from Cubesats over constellations to larger satellites and can be easily clustered to fulfil mission requirements.
Based on space-proven liquid metal ion source (LMIS) technology, FOTEC developed the IFM Nano Thruster as a standalone FEEP subsystem including propellant management and electronics (PPU) resulting in a first IOD in early 2018. The technology is now being commercialized as ENPULSION NANO thruster by the spin-out company ENPULSION and has resulted in delivery of several hundred thrusters and more than 100 thruster units in orbit (as of Q1 2022).
Further R&D efforts at both ENPULSION and FOTEC have resulted in new products: the NANO R³ as an evolutionary step based on the NANO as well as the MICRO R³ based on the same technology for more demanding mission requirements. Both products are now being qualified within an ESA qualification project, and the current status and results are presented herein.

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