Design of a compact gantry for carbon-ion beam therapy
- Design of a compact gantry for carbon-ion beam therapy
- YOON, MOOHYUN; Kim, Jaehyun
- Date Issued
- American Physical Society
- This paper presents the design of a compact gantry that uses superconducting bending magnets (BMs), for use in carbon-ion beam therapy.
The size of the gantry is comparable to those of existing gantries that are used for proton-beam therapy.
The designed gantry provides point-to-parallel scanning over an area of 20 cm x 20 cm at the isocenter, and has rotationally-invariant optics,
which are enabled by quadrupole and dipole magnets together with a 90-degree combined-function magnet with 18.6-cm bore radius.
A 90-degree BM accommodates large scanning angles; it also provides equal focusing in horizontal and vertical planes,
and zero-integrated nonlinear fields to minimize beam distortion at the isocenter.
Three-dimensional field analysis of the magnet, and particle-tracking simulation validate the beam optics of the gantry and point-to-parallel scanning.
Taylor map and Lie map are shown to be useful in analysis of magnetic fields and in optimizing the coil windings.
- Article Type
- Physical Review Accelerators and Beams, vol. 22, no. 10, page. 101601, 2019-10
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