most commonly used, but also proton or ion-beam (typically 12C) radiotherapy is growing in popularity [1]. Even if proton and 12 C - ion therapy are technically complex compared to the standard photon therapy [...] de/~wolle/Schuelerlabor/krebstherapie.html Pictures of carbon-ion beam therapy (in the last 70 years ) 1: First treated patient at Lawrence Berkeley Laboratory (1954) [figure from P. Morel, MSPT: Motion Simulator [...] • Helium beams: nuclear fragmentation cross section measurements (closed 2019) (GSI) References : [1] Durante et al, Charged-particle therapy in cancer, Nat. Rev. Clin. Oncol. (2017), https:// doi.org/10