中国先进研究堆冷源尺寸对冷中子导管出口处中子注量率的影响

Effect of the Size of Cold Neutron Source on Neutron Fluence Rate at Exit of Cold Neutron Guides

摘要: 应用蒙特卡罗方法研究了中国先进研究堆冷中子源尺寸对58Ni和超镜冷中子导管出口处中子注量率的影响,使用2个不同软件获得了一致的模拟结果。对于58Ni导管,需要18cm×30cm的冷中子源尺寸才可使积分中子注量率和直到2nm波长的中子注量率达到饱和,对于m=2的超镜导管对应的尺寸为22cm×36cm。

Abstract: Effect of the size of cold neutron source on neutron fluence rate at exit of guide system in China Advanced Research Reactor(CARR) is studied with MonteCarlo simulation technique and coincident results are obtained from different software, which may provide bases for design on the size of cold neutron source from the view point of requirement by neutron guides. For the 58Ni guide and supermirror guide with m=2, the size of 18 cm×30 cm and 22 cm×36 cm, respectively, is needed to saturate both integral neutron fluence rate and fluence rate at wavelength of 2 nm.