Real-time signal processing in field programmable gate array based digital gamma-ray spectrometer

Field programmable gate arrays (FPGAs) are attractive for a digital spectrometer due to its advantages of digital signal processing. However, how to improve the versatility of the spectrometer and increase the operating frequency of the digital shaper has gradually become a limitation that needs to...

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Bibliographic Details
Published in:Review of scientific instruments 2020-10, Vol.91 (10), p.104707-104707
Main Authors: Liu, Yinyu, Xiong, Hao, Dong, Chunhui, Zhao, Chaoyang, Zhou, Quanfeng, Li, Shun
Format: Article
Language:English
Subjects:
Digital signal processing
Energy resolution
Field programmable gate arrays
Gamma ray spectrometers
Real time
Scientific apparatus & instruments
Signal processing
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Summary:Field programmable gate arrays (FPGAs) are attractive for a digital spectrometer due to its advantages of digital signal processing. However, how to improve the versatility of the spectrometer and increase the operating frequency of the digital shaper has gradually become a limitation that needs to be resolved in the FPGA-based spectrometer. A solution to improve the universality of the FPGA-based digital spectroscopy system is presented in this work, and the implementation of the real-time digital signal processing unit is improved to obtain a higher operating frequency, and then the optimal parameters of the digital trapezoidal shaper and the processing unit are also discussed through a series of experiments; finally, a FPGA-based digital spectrometer is developed. With the HPGe detector, the spectrometer achieves excellent energy resolution performance of 0.35% at 662 keV, 0.25% at 1173.2 keV, and 0.23% at 1332.5 keV.
ISSN:0034-6748
1089-7623
DOI:10.1063/5.0005694