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A real-time peak-detection approach for nuclear detection and its implementation on an FPGA

Radiation Detection Technology and Methods 2020年第2期4卷 161-173页

作者： Yao Yang Daowu Li Yan Li Jipeng Zhang Tingting Hu Yan Li Long Wei Beijing Engineering Research Center of Radiographic Techniques and Equipment Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China The College of Nuclear Technology and Automation Engineering Chengdu University of TechnologyChengdu 610059China

Introduction Detecting a pulse correctly is a key process in nuclear *** the radiation emission is a random process,it is hard to design a suitable peak-detection approach in *** error detection will influence the final energy spectrum and flood *** order to improve the result of nuclear detection,this paper proposes a novel method for nuclear signal peak-detection,which can improve both the effective counting rate and the quality of pulses in *** The main method is to establish a normalized reference pulse regardless of waveform through the least squares *** calculating the loss between the incoming data stream and normalized reference pulse,this algorithm retains the pulses whose loss is below the *** select the threshold based on statistical *** algorithm is implemented on field programmable gate array(FPGA)successfully,and this process is able to work in *** The result shows that the effective counting rate can improve about 19.8%and more than 99%pile-up and error pulses will be *** analyzing reserved pulses,the energy spectrum and flood histogram could be well *** energy resolution increases 11%compared with traditional ***,due to this new algorithm,the low-energy threshold can be lower.

关键词： Least square method Peak detection Pulse pile-up(PPU) real-time calculation FPGA

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