,A study of beryllium moderator thickness for a fission chamber with fast neutron measurements

• 作 者: Wen-Di Wang Hong-Rui Cao Jing Cao Guo-Liang Yuan Ze-Jie Yin
• 机 构: State Key Laboratory of Particle Detection and Electronics,University of Science and Technology of C
• 出 处: 核技术（英文版）
• 发表日期: 2017年9期
• 关键词: Fission chamber Fast neutron Neutron flux monitor ITER GEANT4

The detection efficiency of the fission chamber (FC) is very important for studying the neutron flux measurement (NFM) system in ITER.In this article,we mainly focus our attention on the influence of the moderator.With the Monte Carlo particle transport simulation tool named Geant4,we make a simulation of FC detection efficiency with different levels of thickness of a beryllium moderator.Two manufactured FCs for ITER-NFM systems are then used to test the parameters and performance.The test results agree well with our simulation.