Digital gamma-ray spectroscopy based on FPGA technology

A digital method for separation and reconstruction of pile-up events in germanium detectors

“…A common method for pile-up inspection in γ-ray spectroscopy systems is to process the signals in a fast channel in parallel to the slow pulse processing one 6,7 . In the fast channel, the signals are differentiated to form narrow pulses and the pile-up detector examines the pile-up events by measuring the time intervals between these signals.…”

Hardware Implementation for Pileup Correction Algorithms in Gamma_Ray Spectroscopy

“…Pileup happens when two pulses overlap at high count rate, particularly for crystal NaI(Tl) scintillator detectors. The overlapped pulses data contents are either lost or add noise to the system, when no actions are taken to separate these pulses [1], [2]. In hardware design, pulse pileup recovering is achieved using XSG, which is a systemlevel modelling tool that support FPGA hardware design [3].…”

“…In [6], the authors studied a digital pulse pile-up correction algorithm that can recover overlapped pulses up to 80% at high count rates. In [2], [7], the authors discussed the principle of operation and the development of a completely digital spectrometer system with a NaI(TI) detector suitable for high-quality GRS at very high counting rates. The central part of the system, the high-speed parallel pulse processor, is realized using an FPGA device.…”

Development of multichannel analyzer using sound card ADC for nuclear spectroscopy system

“…Conventionally, MCA were manufactured with lots of logic circuits, microprocessor and peripheral devices such as RAM, ROM and I/O. The modern MCA utilized a more sophisticated processor such as Field Programmable Gate Array (FPGA) to accommodate the speed and accuracy of nuclear data [4] [5]. However, for the applications that only apply low and medium activity, such a complex design can be avoided.…”