Study of coil configuration and local optics effects for the GaToroid ion gantry design

Abstract GaToroid, a novel gantry configuration for hadron therapy, is based on superconducting coils that generate toroidal magnetic field to deliver the beam tumour location. Designing complex GaToroid requires careful consideration of local optical effects. We present Python-based tool charged particle transport in electromagnetic fields. The code implements fast tracking arbitrary three-dimensional maps, and it does not require definition specific or regular reference trajectories, as generally case accelerator physics codes. was used characterise behaviour inside system: automatically determine trajectories symmetry plane analyse dynamics around these trajectories. Beam parameters region were compared various configurations GaToroid. This paper introduces new tracker shows benchmarking results. Furthermore, first-order optics studies different arrangements demonstrate main features serve design optimisation.