Hung Tien Dinh, Chien Kim Dinh, Hiep Van Cao, Anh Huy Phan, Vu Minh Hoang


This study presents a design of digital multi-channel analyzer (DMCA) based on field programmable gate array (FPGA), which could be integrated into the real-time radiation monitoring system. The algorithms of pulse shaping filter, detecting peaks and spectrum histogram processing are optimized and performed through the digital signal processing method (DSP) using FPGA resource, leading to cost-effective hardware. The pile-up problem is processed carefully to obtain excellent spectrum in high count rate. The prototype DMCA was examined with a NaI(Tl) detector and compared with the commercial system (DSPEC of ORTEC). The experiment results of Cs137 and Co60 gamma ray spectrum show that its performance is consistently superior to the DSPEC. This prototype system is highly promising for multi-DMCA system in considering performance, cost and size.

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M. Bolic, V. Drndarevic, "Digital gamma-ray spectroscopy based on FPGA technology,", Nuclear Instruments and Methods in Physics Research A, vol. 482,no.3, pp. 761–766, 2002.

Z. Weihua, "The design of digital multi-channel analyzer based on FPGA," Energy Procedia, vol. 39, pp. 428-433, 2013.

P. S. Lee, C. S. Lee and J. H. Lee, "Development of FPGA-based digital signal processing system for radiation spectroscopy, "Radiation Measurements, vol. 48, pp. 12-17, 2013.

S. Korolczuk, S. Mianowski, J. Rzadkiewicz, P. Sibczynski, L. Swiderski, J. Szewinski and I. Zychor, "Digital approach to high rate Gamma-Ray spectrometry," in ANIMMA, 2015.

S. Saxena, and A. I. Hawari, "Investigation of FPGA Based Real Time Adaptive Digital Pulse Shaping for High Count Rate Applications," IEEE Transactions on Nuclear Science, vol. 64, no.7, pp. 1733 - 1738, 2017.

S. Darvish-Molla, K. Chin, W. V. Prestwich and S. H. Byun," Development of a compact and cost effective multi-input digital signal processing system," Nuclear Instruments and Methods in Physics Research A, vol. 879, pp. 13–18, 2018.

Z. J. Qin, C. Chen, J. S. Luo, X. H. Xie, L. Q. Ge and Q. F. Wu, "A pulseshape discrimination method for improving Gamma-ray spectrometry based on a new digital shaping filter," Radiation Physics and Chemistry, vol. 145, pp. 193–201, 2018.

M. M. Ouda, M. S. El_Tokhy, S. Hashima, I. I. Mahmoud,M. Amal-Eldin and N. I. Ziedan, "Hardware implementation for pileup correction algorithms in gamma ray spectroscopy,” International Journal of Computer Applications, vol. 176, no. 6, pp. 43-48, 2017.

S. Kaur and S. P. Kaur, “Design of FIR filter using handing window, hamming window and modified hamming window," in IJARCET, vol. 4, no.5, pp. 2443, 2015.

P. C. Bhaskara and M. D. Uplaneb, "High Frequency Electromyogram Noise Removal from Electrocardiogram Using FIR Low Pass Filter Based On FPGA" Procedia Technology, vol. 25, pp. 497-504, 2016.

G. F. Knoll, “Radiation detection and measurement”, 4th ed., John Wiley & Sons, Inc., 2010.

I. I. Mahmoud, M.S. El Tokhya and H.A. Konberb, "Pileup recovery algorithms for digital gamma ray spectroscopy," Journal of Instrumentation, vol. 7, pp. 1-12, 2012.


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