Development of FPGA-based digital signal processing system for radiation spectroscopy

We have developed an FPGA-based digital signal processing system that performs both online digital signal filtering and pulse-shape analysis for both particle and gamma-ray spectroscopy. Such functionalities were made possible by a state-of-the-art programmable logic device and system architectures employed. The system performance as measured, for example, in the system dead time and accuracy for pulse-height and rise-time determination, was evaluated with standard alpha- and gamma-ray sources using a CsI(Tl) scintillation detector. It is resulted that the present system has shown its potential application to various radiation-related fields such as particle identification, radiography, and radiation imaging.

► An FPGA-based digital processing system was developed for radiation spectroscopy.
► Our digital system has a 14-bit resolution and a 100-MHz sampling rate.
► The FPGA implements the online digital filtering and pulse-shape analysis.
► The pileup rejection is implemented in trigger logic before digital filtering process.
► Our digital system was verified in alpha-gamma measurements using a CsI detector.