Simultaneous ballistic deficit immunity and resilience to parallel noise sources: A new pulse shaping technique

Abstract

A new and different time variant pulse processing system has been developed based on a simple CR-RC filter and two analog switches. The new pulse processing technique combines both ballistic deficit immunity and resilience to parallel noise without a significant compromise to the low energy resolution, generally considered a mutually exclusive requirement. The filter is realized by combining two different pulse-shaping techniques. One of the techniques creates a low rate of curvature at the pulse peak, which reduces ballistic deficit, while the second technique increases the tolerance to low frequency noise by modifying the noise history. Several experimental measurements are presented, including tests on a co-planar grid CdZnTe detector. Improvements on both the resolution and line shape are shown for the 662 keV line of 137 Cs

Review of Research on Nuclear Signal Pulse Shaping

“…Exponential pulse is an essential output of nuclear detector, and pulse shaping is needed to reduce the influence of electronic noise, pulse accumulation and ballistic deficit on the energy resolution of nuclear detector [1][2][3].There are many researches on nuclear pulse shaping at home and abroad. Xiao Wanyun et al from Tsinghua University obtained the trapezoidal shaping algorithm [4] through theoretical derivation, and analyzed part of the performance of the algorithm.…”