Alternating phase focusing beam dynamics for drift tube linacsSimon Lauber, Winfried Barth, Markus Basten, Florian D. Dziuba, Julian List, Maksym Miski-Oglu, Holger Podlech and Stepan YaramyshevEPJ Techn Instrum, 11 1 (2024) 5DOI: https://doi.org/10.1140/epjti/s40485-024-00109-9