Nuclear Engineering and Technology ( IF 2.7 ) Pub Date : 2021-09-18 , DOI: 10.1016/j.net.2021.09.014 Qian Yu 1, 2, 3 , Bin Tang 2, 3 , Chang Huang 3, 4 , Yadong Wei 5 , Shaojia Chen 2, 3 , Lin Qiu 3, 6 , Xiuku Wang 2, 3 , Hong Xu 2, 3 , Zhijia Sun 2, 3 , Guangyou Wei 3, 7 , Mengjiao Tang 3, 8
A high detection efficiency thermal neutron detector based on the 6LiF/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 180mm×192mm 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 <0.1Hz, the maximum count rate >200KHz. Such detector prototype could be an elementary unit for applications in the EMD detector arrays.
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