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A prototype of the SiPM readout scintillator neutron detector for the Engineering Material Diffractometer of CSNS
Nuclear Engineering and Technology  (IF2.341),  Pub Date : 2021-09-18, DOI: 10.1016/j.net.2021.09.014
Qian Yu, Bin Tang, Chang Huang, Yadong Wei, Shaojia Chen, Lin Qiu, Xiuku Wang, Hong Xu, Zhijia Sun, Guangyou Wei, Mengjiao Tang

A high detection efficiency thermal neutron detector based on the 6 LiF/ZnS(Ag) scintillation screens, wavelength-shifting fibers (WLSF) and Silicon photomultiplier (SiPM) readout is under development at China Spallation Neutron Source (CSNS) for the Engineering Material Diffractometer (EMD).A prototype with a sensitive volume of 180 × 192 has been built. Signals from SiPMs are processed by the self-design Application Specific Integrated Circuit (ASIC).

The performances of this detector prototype are as follows: neutron detection efficiency could reach 50.5% at 1 Å, position resolution of 3, the dark count rate <0. 1, the maximum count rate >200.Such detector prototype could be an elementary unit for applications in the EMD detector arrays.