Simulation study reveals optical beam transport limits in a static gantry, indicating key fringe-field and edge-focusing constraints for mechanical-free radiation delivery.
In this work, we developed a 3D computational framework to evaluate the beam transport performance of a static gantry proposed in previous studies. This static gantry enables magnetically driven azimuthal angle selection via tailored fields rather than mechanical rotation, yet its practical feasibility requires rigorous simulation-based evaluation. Our approach utilizes full 3D magnetic field modeling in Opera3D coupled with a custom phase-ellipse tracking program. This integrated workflow captures realistic 3D fringe-field effects and quantitatively evaluates the optical limits driven by momentum spread and boundary edge-focusing. By identifying these primary limitations, this platform provides the requirements and a practical foundation to guide the development and optimization of future static gantry designs.
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Zhao et al. (2026) studied this question.
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