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research article

Feasibility Study of GaToroid Gantries for Carbon Ions

Felcini, E.
•
Haziot, A.
•
Louzguiti, A.
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September 1, 2022
IEEE Transactions on Applied Superconductivity

The use of carbon ions in particle therapy can enhance the treatment quality, introducing higher biological effectiveness compared to photons and protons. Rotating gantries are nowadays used to deliver particle beams from different directions to obtain precise conformal dose mapping at the tumor location. The mechanical stability requirements during the rotation usually require heavy structures. Superconducting magnets can be used to reduce the size and weight of the machine, but complex cryogenics systems are needed to maintain superconductivity during the gantry rotation. The seek for novel gantry configurations for carbon ions is one of the greatest challenges that need to be tackled to widen the accessibility of hadron therapy to a larger number of patients. The concept of GaToroid, a steady-state toroidal gantry implemented with superconducting magnets, can be used to deliver the beam from different directions without the rotation of neither the structure nor the patient. In this work, we present the magnetic design of two GaToroid solutions for Carbon ions, conceived to operate with Nb-Ti cables in the range of 6-7 Tesla. The first solution was designed with 20 pairs of coils, to maximize the flexibility of the treatment, and with an internal diameter of 3.5 meters, to allow a complete couch rotation on the plane. The second option, based on a more conservative design with an internal diameter of 2.3 meters and eight couples of coils, aims to be a compromise between the complexity and cost of the machine, and the flexibility of the treatments. For both configurations, the coil geometry and current distribution were optimized to maximize the carbon ion momentum acceptance for complete coverage of the treatment range without variation of the toroidal magnetic field. The studies here presented can be considered as the first milestone toward the design of toroidal gantries for heavy ions.

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Type
research article
DOI
10.1109/TASC.2022.3160380
Web of Science ID

WOS:000778917300021

Author(s)
Felcini, E.
Haziot, A.
Louzguiti, A.
Lehtinen, T.
Vernassa, G.
Dutoit, B.  
Bottura, L.
Date Issued

2022-09-01

Publisher

IEEE Institute of Electrical and Electronics Engineers

Published in
IEEE Transactions on Applied Superconductivity
Volume

32

Issue

6

Article Number

4400805

Subjects

Engineering, Electrical & Electronic

•

Physics, Applied

•

Engineering

•

Physics

•

superconducting magnets

•

coils

•

ions

•

toroidal magnetic fields

•

carbon

•

superconducting cables

•

conductors

•

gantry

•

hadron therapy

•

magnet design

•

superconducting coils

•

toroidal magnets

Editorial or Peer reviewed

REVIEWED

Written at

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Available on Infoscience
April 25, 2022
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/187342
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