Nuclear Techniques ›› 2019, Vol. 42 ›› Issue (6): 60403-060403.doi: 10.11889/j.0253-3219.2019.hjs.42.060403

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles     Next Articles

Implementation and analysis of Gaussian shaping method for digital nuclear pulse signal

Zhuodai LI1,2,Huaiqiang ZHANG1,2(),Jinyang LIU2,Miaomiao YAN2   

  1. 1. Engineering Research Center of Nuclear Technology Application, East China University of Technology, Ministry of Education, Nanchang 330013, China
    2. School of Nuclear Science and Engineering, East China University of Technology, Nanchang 330013, China
  • Received:2019-02-23 Revised:2019-03-06 Online:2019-06-10 Published:2019-06-18
  • Contact: Huaiqiang ZHANG E-mail:zhanghq821@163.com
  • About author:LI Zhuodai, male, born in 1996, graduated from North China University of Water Resources and Electric Power in 2017, major in nuclear engineering and nuclear technology, master student, focusing on nuclear detection technology and nuclear instruments
  • Supported by:
    Supported by National Natural Science Foundation of China (No.11665001, No.41864007), China Scholarship Council(No.201708360170)

Abstract: Background

Gaussian shaping of digital nuclear pulse signals has been widely used in digital nuclear spectrometer systems due to its easy realization and good performance.

Purpose

This study aims to implement and analyze Gaussian shaping method for digital nuclear pulse signal, digital Sallen-Key and digital CR-RCm.

Methods

Based on the working principle of Sallen-Key and CR-RCm circuit, the Gaussian shaping recursive function was derived by digital technology. The transfer function in Z domain was obtained and its amplitude-frequency response was analyzed. Gaussian shaper was implemented by using the recursive function of digital Sallen-Key and digital CR-RCm for the actual sampled nuclear pulse signal. Finally, based on the signal obtained by Si-PIN detector measuring 55Fe source, energy spectra using different Gaussian shaping methods and various shaping parameters were obtained.

Results

Comparisons of energy spectra shows that the shaping results tend to be Gauss distribution with the increase of shaping parameters, and the shaping pulse becomes wider.

Conclusion

The digital Sallen-Key exhibits better energy resolution performance whilst the digital CR-RCm exhibits better count rate performance.

Key words: Nuclear pulse signal, Gaussian shaping, Digital Sallen-Key, CR-RCm, Energy resolution

CLC Number: 

  • TL817