CERN Accelerating science

Internal Note
Report number	CERN-ACC-NOTE-2021-0017 ; NIMMS-Note-003 ; EDMS 2444379
Title	GaToroid - Status and Perspectives
Author(s)	Bottura, Luca (CERN) ; Dutheil, Yann (CERN) ; Felcini, Enrico (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Haziot, Ariel (CERN) ; Lehtinen, Tuukka (CERN) ; Tommasini, Davide (CERN) ; Vernassa, Gianluca (INFN e Universita Genova (IT))
Corporate author(s)	CERN. Geneva. ATS Department
Publication	2020
Imprint	22 Nov 2020
Number of pages	52
Subject category	Accelerators and Storage Rings
Study	CERN NIMMS
Technology	Power Converters
Abstract	We describe in this report the status of the study performed at CERN on GaToroid, an idea of a novel magnetic configuration based on the symmetry properties of a toroidal magnetic field, that could find its use in gantries for hadron therapy. In the report we recall briefly the concept of this system, and we then expand on beam optics, toroidal magnet design, vector magnet design options. We describe the main results achieved, proving that a magnetic configuration is feasible, and the principle of beam optics are working. We then enter in some details in the description of the technology and sub-scale model development that is on-going at CERN to demonstrate that a toroidal magnet with the desired performance can be built and successfully powered. Finally, we draw a conclusion on this first stage of development, on what we perceive as outstanding issues, and the plan for the near future.
Submitted by	valerie.brunner@cern.ch