Enhanced Energy, Conversion Efficiency and Collimation of Protons Driven by High-Contrast and Ultrashort Laser Pulses oleh Weipeng Yao, Ronan Lelièvre, Tessa Waltenspiel, Itamar Cohen, Amokrane Allaoua, Patrizio Antici, Arie Beck, Erez Cohen, Xavier Davoine, Emmanuel d’Humières, Quentin Ducasse, Evgeny Filippov, Cort Gautier, Laurent Gremillet, Pavlos Koseoglou, David Michaeli, Dimitrios Papadopoulos, Sergey Pikuz, Ishay Pomerantz, Francois Trompier, Yuran Yuan, Francois Mathieu, Julien Fuchs