Design of accelerator beam cut control system based on FPGA

In accelerator driven sub-critical system (ADS) injectorⅡ, the FPGA beam cut technology is designed for accelerator fast protection control system. When a fault signal is detected by the system, the beam can be quickly cut off. And the fault information will be uploaded to implement fault examination and data analysis. The controller based on field programmable gate array could implement optical fiber communication, serial communication and logic level signal output. The optical fiber communication function is used to control an optical chopper to cut off the beam. Serial communication is used for the transmission of real-time status information of the equipment. Moreover, the logic level output signal is designed to control the relay switch signal to protect equipment from damage remotely. According to the onsite test, the response time of beam cut is within 10 μs, which reaches the safety design requirements. (authors)