A prototype of the SiPM readout scintillator neutron detector for the engineering material diffractometer of CSNS
Qian Yu, Bin Tang, Chang Huang, Yadong Wei, Shaojia Chen, Lin Qiu, Xiuku Wang, Hong Xu, Zhijia Sun, Guangyou Wei, Mengjiao Tang
Abstract
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.