中子垂直聚焦单色器的调试

Adjustment of Neutron Vertical Focused Monochromator

中子聚焦单色器可有效提高中子散射谱仪样品处的中子注量率。对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中子垂直聚焦单色器进行调节,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。在样品处得到略大于1倍的增益。这一结果表明,调试是成功的。

The neutron vertical focused monochromator can efficiently raise the neutron fluence rate of sample in neutron scattering spectrometer. The vertical focused monochromator of the neutron powder diffractometer complex in Institute of Nuclear Physics and Chemistry was adjusted, and the beam dimension and the center position were detected by neutron radiograph, the available area of the beam was obtained by scanning along the horizontal and vertical directions at sample position, and the maximum fluence rate at the spot was determined too. The result indicates that the adjustment is successful.