Force probes for development and testing of different electric propulsion systemsAlexander Spethmann, Thomas Trottenberg, Holger Kersten, Franz Georg Hey, Lou Grimaud, Stéphane Mazouffre, Daniel Bock and Martin TajmarEPJ Techn Instrum, 9 1 (2022) 4DOI: https://doi.org/10.1140/epjti/s40485-022-00079-w