1. Department of Physics and Astronomy Ruprecht‐Karl University of Heidelberg Heidelberg Germany
2. Division of Medical Physics in Radiation Oncology German Cancer Research Center (DKFZ) Heidelberg Germany
3. Heidelberg Institute for Radiation Oncology (HIRO) National Center for Radiation Research in Oncology (NCRO) Heidelberg Germany
4. Department of Radiation Oncology Heidelberg University Hospital Heidelberg Germany
5. Heidelberg Ion‐Beam Therapy Center (HIT) Department of Radiation Oncology Heidelberg University Hospital Heidelberg Germany