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应用蒙特卡罗方法对中国先进研究堆(CARR)上的导管CNGC的堆外部分进行了模拟研究。CNGC堆外部分将采用分束设计,CNGC-S和CNGC-N的末端分别设计安装冷中子照相谱仪和小角中子散射谱仪。根据CARR中子导管大厅空间布局,以及谱仪对中子束流的要求,确定CNGC-S的弯导管选择m=3,特征波长为0.2nm的超镜,直导管选择m=2,长度为23.3m的超镜;CNGC-N
Monte Carlo method was used to simulate the heap part of CNGC conduit on China Advanced Research Reactor (CARR). The outer part of the CNGC will be split-beam design. The ends of CNGC-S and CNGC-N are respectively designed with cold neutron spectrometer and small-angle neutron scattering spectrometer. According to the space layout of the CARR neutron tube hall and the requirements of the spectrometer for the neutron beam, the curved tube of CNGC-S is selected with m = 3 and characteristic wavelength of 0.2 nm. The straight tube is selected with m = 2 and the length is 23.3m super mirror; CNGC-N