Brice, Maximilien Ordan, Julien Marius Portrait of Jeff Hangst ALPHA Portrait Antiproton Decelerator Antimatter factory antihydrogen 2018 2018 Portrait of Jeff Hangst, spokesperson of the Alpha collaboration at CERN's Antimatter Factory Brice, Maximilien Alpha Experiment in 2016 ALPHA Experiments and Tracks 2016 2016 Alpha Experiment