Baseline restoration technique based on symmetrical zero-area trapezoidal pulse shaper

作者：Zeng, Guoqiang; Yang, Jian^*; Hu, Tianyu; Ge, Liangquan; Ouyang, Xiaoping; Zhang, Qingxian; Gu, Yi

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2017, 858: 57-61.

DOI：10.1016/j.nima.2017.03.049

• Baseline restoration
• Symmetrical zero-area
• Pulse shaping
• Digital signal processing

Since the baseline of the unipolar pulse shaper have the direct-current (DC) offset and drift, an additional baseline estimator is need to obtain baseline values in real-time. The bipolar zero-area (BZA) pulse shapers can be used for baseline restoration, but they cannot restrain the baseline drift due to their asymmetrical shape. In this study, three trapezoids are synthesized as a symmetrical zero-area (SZA) shape, which can remove the DC offset and restrain the baseline drift. This baseline restoration technique can be easily implemented in digital pulse processing (DPP) systems base on the recursive algorithm. To strengthen our approach, the iron's characteristic x-ray was detected using a Si-PIN diode detector. Compared with traditional trapezoidal pulse shapers, the SZA trapezoidal pulse shaper improved the energy resolution from 237 eV to 216 eV for the 6.403 keV K alpha peak.

• 出版日期2017-6-21
• 单位成都理工大学; 西北核技术研究所