Novel features and GPU performance analysis for EM particle transport in the Celeritas codeSeth R. Johnson, Stefano C. Tognini, Philippe Canal, Thomas Evans, Soon Yung Jun, Guilherme Lima, Amanda Lund and Vincent R. PascuzziEPJ Web Conf., 251 (2021) 03030DOI: https://doi.org/10.1051/epjconf/202125103030