Determination of geometry of heavy ion collisions with forward hadron calorimeter (FHCal) at MPD/NICA Alexander Ivashkin, Dmitry Finogeev, Marina Golubeva, Fedor Guber, Alexander Izvestnyy, Sergey Morozov and Alexander Strizhak EPJ Web Conf., 204 (2019) 07002 Published online: 03 April 2019 DOI: 10.1051/epjconf/201920407002