Multi-channel analyzer based on a novel pulse fi tting analysis method

Qingshan Wang; Xiongjie Zhang; Xiangting Meng; Bao Wang; Dongyang Wang; Pengfei Zhou; Renbo Wang; Bin Tang

doi:https://doi.org/10.1016/j.net.2021.12.019

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자료유형: 학술저널

저자정보: Qingshan Wang (Engineering Research Center of Nuclear Technology Application (East China University of Technology)) Xiongjie Zhang (Engineering Research Center of Nuclear Technology Application (East China University of Technology)) Xiangting Meng (Engineering Research Center of Nuclear Technology Application (East China University of Technology)) Bao Wang (Engineering Research Center of Nuclear Technology Application (East China University of Technology)) Dongyang Wang (Engineering Research Center of Nuclear Technology Application (East China University of Technology)) Pengfei Zhou (Engineering Research Center of Nuclear Technology Application (East China University of Technology)) Renbo Wang (Engineering Research Center of Nuclear Technology Application (East China University of Technology)) Bin Tang (Engineering Research Center of Nuclear Technology Application (East China University of Technology))

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제54권 제6호

발행연도: 2022.6

수록면: 2,023 - 2,030 (8page)

DOI: https://doi.org/10.1016/j.net.2021.12.019

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A novel pulse fitting analysis (PFA) method is presented for the acquisition of nuclear spectra. Thecharging process of the feedback capacitor in the resistive feedback charge-sensitive preamplifier isequivalent to the impulsive pulse, and its impulse response function (IRF) can be obtained by non-linearfitting of the falling edge of the nuclear pulse. The integral of the IRF excluding the baseline representsthe energy deposition of the particles in the detector. In addition, since the non-linear fitting process inPFA method is difficult to achieve in the conventional architecture of spectroscopy system, a new multichannel analyzer (MCA) based on Zynq SoC is proposed, which transmits all the data of nuclear pulsesfrom the programmable logic (PL) to the processing system (PS) by high-speed AXI-Stream in order toimplement PFA method with precision. The linearity of new MCA has been tested. The spectrum of 137Cswas obtained using LaBr3(Ce) scintillator detector, and was compared with commercial MCA by ORTEC. The results of tests indicate that the MCA based on PFA method has the same performance as thecommercial MCA based on pulse height analysis (PHA) method and excellent linearity for g-rays withdifferent energies, which infers that PFA method is an effective and promising method for the acquisitionof spectra. Furthermore, it provides a new solution for nuclear pulse processing algorithms involvingregression and iterative processes

#Pulse fitting analysis #Embedded MCA #Zynq SoC #Energy spectrometer

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