Design of digital power control system applied in sector focusing cyclotron

In order to enhance the beam transmission efficiency, intensity and stability of SFC (Sector Focusing Cyclotron), the power supply must be stabilized with long-term variations at a magnitude of 10-4. A high-precision and stable power control system was designed and optimized adopting the ATmega128 as the microcontroller, based on CPLD logic programming to communicate between ATmega128 MCU and peripheral devices, and the device RTL8019AS was used to realize remote control. The system has been successfully used in injector SFC of heavy ion research facility in Lanzhou. The result shows that it works stably and reliably and it can be flexibly remote-controlled.