Bandwidth Requirement Determination for a Digitally Controlled Cavity Synchronisation in a Heavy Ion Synchrotron Using Ptolemy II

This paper describes a high-level simulation model and its application to determine bandwidth requirements for the hardware implementation of a digital control system. The simulation model is based on Ptolemy II and describes a heavy-ion synchrotron and its control systems for resonance frequency, beam phase, and cavity synchronisation. Simulations are used to verify the suitability of the chosen system structure and to obtain minimum update rates for the coefficients of the adaptive digital controllers. These update rates translate into bandwidth requirements for a fiber optical network connecting the different controller subsystems. Our modelling approach as well as our method to determine the low-level requirements are described in detail and simulation results are presented and discussed.