Design Study of a Superconducting Gantry for Carbon Beam Therapy

TL;DR

This paper presents a compact superconducting gantry design for carbon beam therapy, utilizing innovative coil configurations and optimization techniques to achieve rotation-invariant optics and minimized beam distortion.

Contribution

It introduces a novel superconducting gantry design with optimized coil windings for improved beam control and reduced size in carbon therapy applications.

Findings

Achieved a compact gantry size comparable to proton gantry.

Reduced beam-shape distortion through coil winding optimization.

Demonstrated significant reduction in higher-order transfer coefficients.

Abstract

This paper describes the design study of a gantry for a carbon beam. The designed gantry is compact such that its size is comparable to the size of the proton gantry. This is possible by introducing superconducting double helical coils for dipole magnets. The gantry optics is designed in such a way that it provides rotation-invariant optics and variable beam size as well as point-to-parallel scanning of a beam. For large-aperture magnet, three-dimensional magnetic field distribution is obtained by invoking a computer code, and a number of particles are tracked by integrating equations of motion numerically together with three-dimensional interpolation. The beam-shape distortion due to the fringe field is reduced to an acceptable level by optimizing the coil windings with the help of genetic algorithm. Higher-order transfer coefficients are calculated and shown to be reduced greatly with appropriate optimization of the coil windings.