High counting rate two-dimensional neutron-imaging method using rectangular scintillators with WLS fibers
High counting rate two-dimensional neutron-imaging method using rectangular scintillators with WLS fibers
复制标题
使用WLS光纤矩形闪烁体的高计数率二维中子成像方法
DOI：
10.1007/s003390201834
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
M. Nakazawa
中科院分区：
文献类型：
--
作者：
K. Toh;M. Katagiri;K. Sakasai;M. Matsubayashi;A. Birumachi;H. Takahashi;M. Nakazawa
在新一代高强度脉冲中子源的中子散射实验中，提出了一种基于移波长光纤矩形闪烁体的高计数率二维中子成像方法。在纵向和横向上设置矩形闪烁体，并沿这些闪烁体的四面连接WLS光纤。在闪烁体中产生的发光被四根光纤吸收，并通过多通道光电倍增管检测波长偏移的发光。入射中子的位置由这四个信号的巧合决定。通过使用5个mm×5 mm×2 mm厚度的6li玻璃闪烁体和0.5 mm方形WLS光纤进行实验，证实了每个像素的最大计数率为3 Mcps，符合时间为100 ns。
A high counting rate two-dimensional neutron-imaging method using rectangular scintillators with wavelength-shifting (WLS) fibers has been developed for neutron-scattering experiments at a next-generation high-intensity pulsed-neutron source. Rectangular scintillators are arranged in longitudinal and transverse directions and WLS fibers are attached along four sides of these scintillators. Luminescences generated in the scintillator are absorbed by the four fibers and wavelength-shifted luminescences are detected by multi-channel photomultipliers. The position of an incident neutron is decided by coincidence of the four signals. By experiments using 5 mm×5 mm×2 mm-thickness6Li glass scintillators and 0.5-mm square WLS fibers, it was confirmed that the maximum counting rate for each pixel was 3 Mcps with the coincidence time of 100 ns.