Nuclear Techniques ›› 2017, Vol. 40 ›› Issue (2): 20402-020402.doi: 10.11889/j.0253-3219.2017.hjs.40.020402

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles     Next Articles

Trapezoidal filter for digital spectrum acquire

LIU Yinyu, WANG Yudong, ZHOU Rong, YANG Chaowen   

  1. College of Physical Science and Technology, Key Laboratory of Radiation Physics and Technology, Ministry of Education, Sichuan University, Chengdu 610064, China
  • Received:2016-11-14 Revised:2016-12-06 Online:2017-02-10 Published:2017-01-24
  • Supported by:

    Supported by National Natural Science Foundation of China (No.11205108, No.11475121), Excellent Youth Fund of Sichuan University (No.2016SCU04A13)

Abstract:

Background: Since the 1990s, with the rapid development of various digital devices, nuclear signal digital processing has been widely used. Purpose: To enhance energy resolution of digital spectrum system of nuclear radiation measurement, appropriate filter and pulse shaping algorithm is necessary. Trapezoidal filter is widely used for its advantage of easy to use and narrow pulse width, etc. Methods: The trapezoidal model and two kinds of trapezoidal filter algorithm based on simplified mathematical model of detector's output pulse signal are established. Results: The energy resolution of 137Cs spectrum has improved to 7.65% from 10.78%. Conclusion: Trapezoid shaping is necessary in nuclear signal digital processing.

Key words: Digital spectroscopy, Pulse model, Trapezoidal shaping, FPGA implementation, Energy resolution

CLC Number: 

  • TL82