CARR堆HRPD谱仪垂直聚焦单色器的选取和强度增益计算  

Choice of the vertically focused monochromator of the high resolution neutron powder diffractometer at CARR

作　　者：郭立平[1] 孙凯[1] 陈东风[1] 张百生[1] 成之绪[1] 赵志祥[1] 

机构地区：[1]中国原子能科学研究院核物理研究所,北京102413

出　　处：《核技术》2002年第6期413-418,共6页Nuclear Techniques

摘　　要：垂直聚焦单色器技术是提高样品位置中子强度的有效手段。本文应用蒙特卡罗模拟方法对中国先进研究堆 (CARR)旁高分辨中子粉末衍射仪 (HRPD)的垂直聚焦单色器进行了优化选取 ,得到了垂直聚焦单色器高度、聚焦曲率半径和倾角等参数值 ,计算了使用垂直聚焦单色器相对于平板单色器的强度增益和样品处聚焦束尺寸。Vertically focused monochromator technique is an effective tool of increasing neutron intensity at sample position. Monte Carlo simulation is applied in choice of vertically focused monochromator of the high resolution neutron powder diffractometer (HRPD) at China Advanced Research Reactor (CARR). The height,curvature radii and tilting angles of the monochromator are obtained. The intensity gains of the vertically focused monochromator comparing to flat monochromator and the effective neutron beam size at sample position are given by simulation.

关 键 词：垂直聚焦单色器 强度增益 蒙特卡罗模拟 高分辨中子粉末衍射仪 中子衍射 

分 类 号：TL817.3[核科学技术—核技术及应用] O242.2[理学—计算数学]