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本文采用高能粒子输运程序MCNPX2.5.0,对中国散裂中子源(CSNS)靶站重要部件所使用的钨、SS316不锈钢与Al-6061等材料,由于中子与质子辐照所引起的损伤能量截面与原子离位截面进行了计算,对钨靶体、靶的不锈钢容器、慢化器与反射体的铝容器等部件的辐照损伤量——原子离位次数(displacement pe ratom,DPA)进行了计算与分析,并给出了质子束斑形状对靶体及靶容器DPA峰值的影响.这些计算与分析对正在建设的中国散裂中子源靶站的设计及参数选择具有重要的实际意义.
In this paper, high-energy particle transport program MCNPX2.5.0 is used to damage the materials such as tungsten, SS316 stainless steel and Al-6061 used in the important components of the Chinese spallation neutron source (CSNS) target station due to the irradiation caused by neutron and proton radiation Energy cross section and atomic exit cross section were calculated. The irradiation damage amount (displacement pe ratom (DPA)) of tungsten target, stainless steel container, aluminum container of reflector and reflector, And the influence of proton beam spot shape on the DPA peak of target body and target vessel is given.These calculations and analyzes are of great practical significance for the design and parameter selection of the Chinese spallation neutron source station under construction significance.