【摘要】 介绍了中子散射谱仪用的中子垂直聚焦单色器的基本原理,描述了安装在中国工程物理研究院核物理与化学研究所的中子衍射谱仪的中子垂直聚焦单色器的调节方法。在样品处利用中子照相确定了束斑的中心位置和大小,通过在水平和垂直方向上的扫描得到了可利用的中子束的面积,测量了该处的最大中子注量率,结果表明在样品处得到略大于一倍的增益。更多还原

【Abstract】 The article introduces the basic principle of the vertically focused monochromator used in neutron scattering spectrometer which has been installed in Institute of Nucleus Physics and Chemistry as well as the adjustment method of the monochromator. The central position and dimension of neutron beam were determined by using neutron radiography,and the available area of the beam was obtained by scanning the sample position along horizontal and vertical directions. The biggest nutron fluence was measured at the sample position. The measured neutron fluence rate data show that almost double gain was got at the sample position.更多还原