Imaging a positronium cloud in a 1 Tesla Antoine Camper, Stefano Aghion, Claude Amsler, Massimiliano Antonello, Alexander Belov, Germano Bonomi, Roberto Brusa, Massimo Caccia, Ruggero Caravita, Fabrizio Castelli et al. (54 more) EPJ Web Conf., 198 (2019) 00004 Published online: 15 January 2019 DOI: 10.1051/epjconf/201919800004