Magnet Developments and Commissioning for the IBA Compact Gantry

摘要: The ProteusOne gantry will be the first IBA with scanning upstream of last bending magnet. This configuration offers combined advantage compactness and Pencil Beam Scanning (PBS) reasonable source to axis distance (SAD). new proton therapy required modifications on existing beam line magnets as well development ones. paper presents basic features advantages optics details that needed designed. In addition, some specific issues raised by detailed. magnet last, wide gap, special attention ensure good quality optics. Indeed, due small between them, careful design is minimize their mutual influence. Parts structural elements also had taken into account, adding complexity magnetic modeling requiring very collaboration mechanical teams. Finally, commissioning model crosschecks are presented.