The investigation of a new fast timing system based on DRS4 waveform sampling system
The investigation of a new fast timing system based on DRS4 waveform sampling system
复制标题
基于DRS4波形采样系统的新型快速授时系统研究
DOI：
10.1016/j.net.2018.10.001
复制
发表时间：
2019
影响因子：
2.7
通讯作者：
Hu Zhengguo
中科院分区：
文献类型：
--
作者：
Zhang Xiuling;Du Chengming;Chen Jinda;Yang Herun;Kong Jie;Yang Haibo;Ma Peng;Shi Guozhu;Duan Limin;Hu Zhengguo
在核结构研究中，快计时技术可以用来测量激发态的寿命。本文研制了一种新的快速定时系统，它由两个LaBr_3：Ce探测器和一套波形采集系统组成。基于DRS 4芯片的采样系统能够存储探测器信号的波形信息，体积小，定时精度高，波形数据采用数字波形分析方法。双湮灭511 keV γ光子快计时系统的符合时间分辨率为200 ps（FWHM），能量分辨率为3.5%@511keV，在大动态范围内能量线性响应良好。同时，为了验证系统的快速定时性能，测量了152 Eu源β+衰变产生的152 Gd-21+态。测得的寿命为45.3（±5.0）ps，与国家核数据中心（NNDC）的寿命值46.2（±3.9）ps非常接近。实验结果表明，该快速计时系统能够测量几十ps的寿命。因此，该系统可广泛应用于快速定时技术的研究。
In the study of nuclear structure, the fast timing technique can be used to measure the lifetime of excited states. In the paper, we have developed a new fast timing system, which is made up of two LaBr3:Ce detectors and a set of waveform sampling system. The sampling system based on domino ring sampler version 4 chip (DRS4) can digitize and store the waveform information of detector signal, with a smaller volume and higher timing accuracy, and the waveform data are performed by means of digital waveform analysis methods. The coincidence time resolution of the fast timing system for two annihilation 511 keV γ photon is 200ps (FWHM), the energy resolution is 3.5%@511 keV, and the energy linear response in the large dynamic range is perfect. Meanwhile, to verify the fast timing performance of the system, the152Gd-21+state form β+decay of152Eu source is measured. The measured lifetime is 45.3(±5.0)ps, very close to the value of the National Nuclear Data Center (NNDC: 46.2((±3.9)ps). The experimental results indicate that the fast timing system is capable of measuring the lifetime of dozens of ps. Therefore, the system can be widely used in the research of the fast timing technology.