Simulation of large-scale fast neutron liquid scintillation detector
Simulation of large-scale fast neutron liquid scintillation detector
复制标题
大型快中子液体闪烁探测器仿真
DOI：
10.1088/1674-1137/37/2/026003
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发表时间：
2013-02
影响因子：
3.6
通讯作者：
Yue Qian
中科院分区：
文献类型：
--
作者：
Xing Hao-Yang;Wang Li;Zhu Jing-Jun;Tang Chang-Jian;Yue Qian
在暗物质探测中，中子本底测量一直是非常重要的，因为入射中子和暗物质粒子对反冲核散射的影响几乎是相同的。对于深部地下实验，中子本底的通量很低，通常需要进行大规模的探测。本文利用Geant4软件，研究了探测效率与体积的关系，并在相同体积条件下，比较了单个大尺寸探测器和阵列式多探测器两种探测几何方案。在与中国井坪地下实验室相似的背景条件下，对探测器的几何参数进行了筛选，得到了探测器的探测效率。结果表明，对于大规模的Gd掺杂液体闪烁探测器，其探测效率先随探测器尺寸的增大而增大，然后趋于恒定。在长度和截面积相同的情况下，阵列多探测器的检测性能几乎与单个大尺寸探测器相当，但探测器数目过多会导致检测性能退化。综合考虑测试、装配和生产等工程因素，4×4阵列式探测器方案更加灵活，更加适用。此外，通过模拟光过程，评价了快慢信号符合探测的条件和中子能量的可探测下限。
Neutron background measurement is always very important for dark matter detection due to almost the same effect for the recoiled nucleus scattered off by the incident neutron and dark matter particle. For deep under-ground experiments, the flux of neutron background is so low that large-scale detection is usually necessary. In this paper, by using Geant4, the relationship between detection efficiency and volume is investigated, meanwhile, two geometrical schemes for this detection including a single large-sized detector and arrayed multi-detector are compared under the condition of the same volume. The geometrical parameters of detectors are filtrated and detection efficiencies obtained under the similar background condition of China Jingping Underground Laboratory (CJPL). The results show that for a large-scale Gd-doped liquid scintillation detector, the detection efficiency increases with the size of detector at the beginning and then trends toward a constant. Under the condition of the same length and cross section, the arrayed multi-detector has almost similar detection performance as the single large-sized detector, while too much detector number could cause degeneration of detection performance. Considering engineering factors, such as testing, assembling and production, the 4×4 arrayed detector scheme is flexible and more suitable. Furthermore, the conditions for using fast and slow signal coincidence detection and the detectable lower limit of neutron energy are evaluated by simulating the light process.
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影响因子：
3.5
作者：
E. Tziaferi;M. Carson;V. Kudryavtsev;R. Lerner;P. Lightfoot;S. Paling;M. Robinson;N. Spooner
通讯作者：
E. Tziaferi;M. Carson;V. Kudryavtsev;R. Lerner;P. Lightfoot;S. Paling;M. Robinson;N. Spooner
影响因子：
56.9
作者：
D. Normile
通讯作者：
D. Normile
影响因子：
5
作者：
M. Deniz;E. al.;Texono Collaboration
通讯作者：
M. Deniz;E. al.;Texono Collaboration
DOI：
10.1016/j.nima.2010.08.091
发表时间：
2010-11
影响因子：
1.4
作者：
J. Zhang;Y. Tan;Haidong Wang;H. Lu;X. Meng;Y. Muraki
通讯作者：
J. Zhang;Y. Tan;Haidong Wang;H. Lu;X. Meng;Y. Muraki
影响因子：
3.5
作者：
V. Chazal;R. Brissot;J. Cavaignac;B. Chambon;M. Jésus;D. Drain;Y. Giraud-Héraud;C. Pastor;A. Stutz;L. Vagneron
通讯作者：
V. Chazal;R. Brissot;J. Cavaignac;B. Chambon;M. Jésus;D. Drain;Y. Giraud-Héraud;C. Pastor;A. Stutz;L. Vagneron