An Efficient Pulse Shaping Method Based on Wavelet Transform

Pile-up discrimination and baseline calibration are two key features of a pulse shaper in nuclear pulse signal processing. To meet the requirement of increased counting rate, an efficient pulse shaping method based on wavelet transform is presented in this paper. First a Mexican Hat wavelet(MHW) shaper is constructed based on wavelet transform. Then the capabilities of pile-up discrimination are investigated under various input intervals and compared with other two traditional shaping methods. At the end of this paper, the counting rate changes with the scale variable s of MHW are discussed. Results illustrate that with the feature of zero baseline, the proposed MHW shaper outperforms other two shapers either in the pile-up discrimination or in the baseline processing and can be used in high counting rate pulse signal processing.