扫描手机二维码

欢迎您的访问
您是第 位访客

开通时间:..

最后更新时间:..

  • 魏志勇 ( 研究员 )

    的个人主页 http://faculty.nuaa.edu.cn/wzy/zh_CN/index.htm

  •   研究员
  • 招生学科专业:
    光学工程 -- 【招收硕士研究生】 -- 航天学院
    航空宇航科学与技术 -- 【招收博士、硕士研究生】 -- 航天学院
    电子信息 -- 【招收硕士研究生】 -- 航天学院
    机械 -- 【招收博士、硕士研究生】 -- 航天学院
论文成果 当前位置: 中文主页 >> 科学研究 >> 论文成果
Pulse shape discrimination based on fast signals from silicon photomultipliers

点击次数:
所属单位:航天学院
发表刊物:NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
关键字:Fast signal Plastic scintillator Neutron detection Pulse shape discrimination Silicon photomultiplier
摘要:Recent developments in organic plastic scintillators capable of pulse shape discrimination (PSD) enable a breakthrough in discrimination between neutrons and gammas. Plastic scintillator detectors coupled with silicon photomultipliers (SiPMs) offer many advantages, such as lower power consumption, smaller volume, and especially insensitivity to magnetic fields, compared with conventional photomultiplier tubes (PMTs). A SensL SiPM has two outputs: a standard output and a fast output. It is known that the charge injected into the fast output electrode is typically approximately 2% of the total charge generated during the avalanche, whereas the charge injected into the standard output electrode is nearly 98% of the total. Fast signals from SiPMs exhibit better performance in terms of timing and time-correlated measurements compared with standard signals. The pulse duration of a standard signal is on the order of hundreds of nanoseconds, whereas the pulse duration of the main monopole waveform of a fast signal is a few tens of nanoseconds. Fast signals are traditionally thought to be suitable for photon counting at very high speeds but unsuitable for PSD due to the partial charge collection. Meanwhile, the standard outputs of SiPMs coupled with discriminating scintillators have yielded nice PSD performances, but there have been no reports on PSD using fast signals. Our analysis shows that fast signals can also provide discrimination if the rate of charge injection into the fast output electrode is fixed for each event, even though only a portion of the charge is collected. In this work, we achieved successful PSD using fast signals; meanwhile, using a coincidence timing window of less 3 nanoseconds between the readouts from both ends of the detector reduced the influence of the high SiPM dark current. We experimentally achieved good timing performance and PSD capability simultaneously.
ISSN号:0168-9002
是否译文:否
发表时间:2018-06-21
合写作者:Yu, Junhao,方美华,Zhang, Zixia,Cheng, Can,王一平,Su, Huiwen,Ran, Youquan,Zhu, Qingwei,张鹤千,Duan, Kai,陈明和,Liu, Meng
通讯作者:魏志勇

 

版权所有©2018- 南京航空航天大学·信息化处(信息化技术中心)