Pick-Up and Orbit Measurement System for CNAO

The future Italian National Centre for Oncological Hadron therapy (CNAO) will host an accelerator complex whose design is based on the PIMMS project. This paper describes the closed orbit measurement system (beam position monitor and its associated electronics modules) of the synchrotron, from the design requirements to the prototyping. Laboratory tests show that the system is capable to satisfy the requirements, such as 60 dB of dynamic range, 0.1/0.13 mm resolution for proton/carbon ions, and low linearity errors (±0.7 %).