PPPS-2013: Abstract a digital hardware design to control and monitor a high voltage pulsed power supply for the electric field fast deflector of the medaustron hadron therapy facility

Summary form only given. The MedAustron ion-therapy centre for cancer treatment and research will comprise a particle accelerator facility using a synchrotron for the delivery of protons and light-ions. The Low Energy Beam Transfer line (LEBT) between the ion source and the synchrotron contains an electric field fast deflector (EFE) to chop the continuous beam arriving from the source. By using an electric field the beam is deviated onto a Faraday Cup (FC). A pulsed power supply (PKF) with high voltage MOSFET switches connected in a push-pull configuration and a specified voltage of ± 3.5 kV is used for charging and discharging the electrodes of the EFE. This allows beam passage for multi-turn injection into the synchrotron for variable pulse durations from 500 ns up to d.c. with rise and fall times of less than 300 ns between 90 % of peak voltage and a ± 1 V level. To verify the switching to the ± 1 V level and subsequent flat bottom pulse quality a large dynamic range monitoring circuit is implemented in the PKF. A hardware design, based on a complex programmable logic device (CPLD), is used to control and monitor the pulsed power supply. An interface to a supervisory control unit is provided by the use of a programmable logic controller (PLC) to switch between different states of the PKF and to report errors detected by the monitoring circuit. This paper presents the design decisions made for the digital hardware design on the CPLD and their results.