中子粉末衍射谱仪导管选型设计与计算  

The Configuration Design and Calculation of Neutron Powder Diffraction Complex

作　　者：谢雷[1,2] 陈喜平[2] 刘颖[1] 樊志剑[2] 李新喜[2] 王晓影[2] 

机构地区：[1]四川大学材料科学与工程学院,成都610065 [2]中国工程物理研究院核物理与化学研究所,绵阳621900

出　　处：《核电子学与探测技术》2010年第6期797-801,共5页Nuclear Electronics & Detection Technology

基　　金：中国工程物理研究院科学技术发展基金(2007B02002)资助课题

摘　　要：由于中子粉末衍射谱仪新导管需要确定选型,用McStas模拟软件计算了不同宽度和超镜因子的三类弯导管对特定波段中子的传输效率,从中选择了三种传输效率较好又满足现场安装条件的弯曲导管做了更进一步的计算,为了比较不同形状导管的性能和对谱仪性能的影响,同时也计算了直导管和锥型导管。五种导管对分辨率影响计算中,最小晶格分辨可达3.5‰左右。综合考虑结果表明,选取弯曲导管比较合适。In order to confirm the new neutron guide configuration of neutron powder diffraction complex （PDC）, it calculated the given wave band neutron transmission efficiency of three different width and supermirror factor guides. Then three kinds of guide, which have preferable transmission efficiency and satisfy the installing conditions of site, were selected for next calculations. In addition, in order to compare the performance and the effect to instrument performance of different shapes, the straight and tapered guides were simulated too. The best lattice resolution of instrument with five guides is about 3. 5‰. The simulation results show that bended guide is a preferable selection.

关 键 词：中子导管 分辨率 注量率 超镜因子 

分 类 号：TL817.3[核科学技术—核技术及应用]