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The BESⅢ ·RPC with Gd coating as thermal neutron detector was designed and constructed. Three prototypes were built with different techniques of producing the gadolinium converter. The performance of the cosmic ray test, the signal and the radiation spectrum were discussed in this paper. Lastly, the efficiency of one prototype with the best performance for detecting the thermal neutron was tested as 8.7%. 相似文献
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徐吉磊 关梦云 杨长根 王贻芳 张家文 LU Chang-Guo Kirk McDonald Robert Hackenburg Kwong Lau Logan Lebanowski Cullen Newsom Lin Shih-Kai Jonathan Link 马烈华 Viktor Pec Vit Vorobel 陈进 刘金昌 周永钊 梁昊 《中国物理 C》2011,35(9):844-850
Resistive Plate Chamber (RPC) modules will be used as one part of the cosmic muon veto system in the Daya Bay reactor neutrino experiment. A total of 189 RPC modules will cover the three water pools in the experiment. To achieve track reconstruction and high efficiency, each module consists of 4 layers, each of which contains two sizes of bare chambers. The placement of bare chambers is reversed in different layers to reduce the overlapping dead areas. The module efficiency and patch efficiency were studied both in simulation and test of the data analysis. 143 modules have been constructed and tested. The preliminary study shows that the module and patch 3 out of 4 layers efficiency reaches about 98%. 相似文献
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