Silicon photomultiplier based scintillator thermal neutron detector for China Spallation Neutron Source (CSNS)
Xiu-Ping Yue(岳秀萍)1,2,†, Zhi-Fu Zhu(朱志甫)1,2,3,†, Bin Tang(唐彬)2,4,‡, Chang Huang(黄畅)2,5, Qian Yu(于潜)6, Shao-Jia Chen(陈少佳)2,4, Xiu-Ku Wang(王修库)2,4, Hong Xu(许虹)2,4, Shi-Hui Zhou(周诗慧)2,7, Xiao-Jie Cai(蔡小杰)2,8, Hao Yang(杨浩)2,7, Zhi-Yong Wan(万志勇)1,2, Zhi-Jia Sun(孙志嘉)2,4, and Yun-Tao Liu(刘云涛)2,4
1 Engineering Research Center of Nuclear Technology Application, East China University of Technology, Ministry of Education, Nanchang 330013, China; 2 Spallation Neutron Source Science Center, Dongguan 523803, China; 3 Zhengzhou University of Technology, Zhengzhou 450044, China; 4 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China; 5 Lanzhou University, Lanzhou 730000, China; 6 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; 7 Zhengzhou University, Zhengzhou 450001, China; 8 Southwest University of Science and Technology, Mianyang 621002, China
Abstract The energy-resolved neutron imaging spectrometer (ERNI) will be installed in 2022 according to the spectrometer construction plan of the China Spallation Neutron Source (CSNS). The instrument requires neutron detectors with the coverage area of approximately 4 m2 in 5° -170° neutron diffraction angle. The neutron detection efficiency needs to be better than 40% at 1 Å neutron wavelength. The spatial resolution should be better than 3 m mm×50 mm in the horizontal and vertical directions respectively. We develop a one-dimensional scintillator neutron detector which is composed of the 6LiF/ZnS (Ag) scintillation screens, the wavelength-shifting fiber (WLSF) array, the silicon photomultipliers (SiPMs), and the self-designed application-specific integrated circuit (ASIC) readout electronics. The pixel size of the detector is designed as 3 m mm×50 mm, and the neutron-sensitive area is 50 m mm×200 mm. The performance of the detector prototype is measured using neutron beam 20# of the CSNS. The maximum counting rate of 247 kHz, and the detection efficiency of 63% at 1.59 Å are obtained. The test results show that the performance of the detector fulfills the physical requirements of the ERNI under construction at the CSNS.
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11875273, U1832111, 61964001, and 12275049), the Science Foundation of Guangdong Province of China (Grant No. 2020B1515120025), the Neutron Physics Laboratory Funding of China Academy of Engineering Physics (Grant No. 2018BC03), the General Project of Jiangxi Province Key Research and Development Program (Grant No. 20212BBG73012), the Key Scientific Research Projects of Henan Higher Education Institutions (Grant Nos. 23A490002 and 24A490001), and the Engineering Research Center of Nuclear Technology Application (Grant No. HJSJYB2021-4).
Corresponding Authors:
Bin Tang
E-mail: tangb@ihep.ac.cn
Cite this article:
Xiu-Ping Yue(岳秀萍), Zhi-Fu Zhu(朱志甫), Bin Tang(唐彬), Chang Huang(黄畅), Qian Yu(于潜), Shao-Jia Chen(陈少佳), Xiu-Ku Wang(王修库), Hong Xu(许虹), Shi-Hui Zhou(周诗慧),Xiao-Jie Cai(蔡小杰), Hao Yang(杨浩), Zhi-Yong Wan(万志勇),Zhi-Jia Sun(孙志嘉), and Yun-Tao Liu(刘云涛) Silicon photomultiplier based scintillator thermal neutron detector for China Spallation Neutron Source (CSNS) 2023 Chin. Phys. B 32 090402
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