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Les accélérateurs à champ fixe et gradient alterné FFAG et leur application médicale en protonthérapie.

Abstract : Radiotherapy uses particle beams to irradiate and kill cancer tumors while sparing healthy tissues. Bragg peak shape of the proton energy loss in matter allows a ballistic improvement of the dose deposition compared with X rays. Thus, the irradiated volume can be precisely adjusted to the tumour. This thesis, in the frame of the RACCAM project, aims to the study and the design of a proton therapy installation based on a fixed field alternating gradient (FFAG) accelerator in order to build a spiral sector FFAG magnet for validation. First, we present proton therapy to define medical specifications leading to the technical specifications of a proton therapy installation. Secondly, we introduce FFAG accelerators through their past and on-going projects which are on their way around the world before developing the beam dynamic theories in the case of invariant focusing optics (scaling FFAG). We describe modelling and simulation tools developed to study the dynamics in a spiral scaling FFAG accelerator. Then we explain the spiral optic parameter search which has leaded to the construction of a magnet prototype. Finally, we describe the RACCAM project proton therapy installation starting from the injector cyclotron and ending with the extraction system.
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Contributor : Joris Fourrier <>
Submitted on : Tuesday, November 11, 2008 - 7:29:10 PM
Last modification on : Thursday, November 19, 2020 - 12:58:44 PM
Long-term archiving on: : Tuesday, October 9, 2012 - 3:15:30 PM


  • HAL Id : tel-00338177, version 1




Joris Fourrier. Les accélérateurs à champ fixe et gradient alterné FFAG et leur application médicale en protonthérapie.. Physique des accélérateurs [physics.acc-ph]. Université Joseph-Fourier - Grenoble I, 2008. Français. ⟨tel-00338177⟩



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