NARMER-1: a photon point-kernel code with build-up factors Thierry Visonneau, Laurence Pangault, Fadhel Malouch, Fausto Malvagi and Florence Dolci EPJ Web Conf., 153 (2017) 06028 Published online: 25 September 2017 DOI: 10.1051/epjconf/201715306028