Compact Achromatic Systems for ProtonTherapy

Robin Tesse

This project, funded through the Win2Wal program , is a collaboration between the Nuclear Metrology Department and IBA and consists of designing an achromatic proton therapy gantry. The studies and research in beam dynamics led the participants to consider innovative aspects that can be integrated into a future gantry. In particular, the idea of an achromatic gantry exploiting FFAG aspects was born. Compared to the state of the art of achromatic gantry, the following points are the most important concerning the contribution of the CASPRO project:

• Achromatic structure based on a FFAG-non scaling design, but modified (inclusions of nonlinear fields and additional quadrupoles making the structure achromatic in an individual way) compared to state of the art.

• Inclusion of the scanning system from the first studies of the gantry structure. Our contribution here will consist of integrating the achromatic cell of the final part of the gantry.

The various points mentioned below are necessary and innovative for the development by the industrial partner:

• Respect of a gantry size as compact as the current state of the art.

• Improvement and reduction of the treatment time: by integrating the scanning system into an achromatic system, the academic and industrial partners intend to propose the first proton gantry fully supporting the benefits of arc-therapy.