A semi-passive beam dilution system for the FCC-ee collider Alexander Krainer, Wolfgang Bartmann, Marco Calviani, Yann Dutheil, Anton Lechner, Antonio Perillo Marcone, Salim Ogur and Rebecca Ramjiawan EPJ Techn Instrum, 9 1 (2022) 3 Published online: 28 May 2022 DOI: 10.1140/epjti/s40485-022-00078-x