Development of FPGA-based coincidence module for TDCR counting system

A new coincidence module for the Triple-to-Double Coincidence Ratio (TDCR) counting system has been developed at KRISS. The module is developed based on the Field-Programmable Gate Array (FPGA) to replace the MAC3, a well-known coincidence module developed by the LNHB for a TDCR system. A cRIO controller equipped with a Zynq-7020 FPGA from the National Instrument is used to develop the FPGA code that emulates the functionality of the MAC3. The performance of the new module was tested by comparing the output count rates of the new module with the output from the MAC3 module. A comparison in activity measurement of 3H and 14C was also performed between the two modules. A good agreement was observed with a difference of less than 1.0% between the new module and the MAC3 module, confirming the ability of the new module to replace the MAC3. •Construction of FPGA-based coincidence module for TDCR counting system.•Output comparison between FPGA-based and MAC3 coincidence module.•Application of FPGA-based coincidence module on activity measurement of 3H and 14C.