Optics design of the extraction lines for the MedAustron hadron therapy centre

The MedAustron hadron therapy centre will provide proton and carbon ion beams for tumour treatment. The accelerator complex is based on a synchrotron that will employ slow resonant extraction to provide beams with the time structure required for active scanning. Four medical treatment rooms and two research rooms are foreseen for the centre. The present paper describes the optics design of the extraction lines that link the synchrotron to the different beam application rooms. A modular approach has been adopted to facilitate running-in and operation and to minimise the number of different magnets and power converters to reduce the overall cost. Specific attention was given to the rather special transverse properties of the slow-extracted beam and to the correct matching of the strongly asymmetric beam to the rotational optics of the gantries. Another important aspect for the design was the overall compactness of the centre.