New Compact Small-Angle Neutron Scattering Spectrometer
New Compact Small-Angle Neutron Scattering Spectrometer
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新型紧凑型小角中子散射光谱仪
DOI：
10.1143/jjap.33.6396
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发表时间：
1994
影响因子：
1.5
通讯作者：
Y. Maeda
中科院分区：
文献类型：
--
作者：
M. Sugiyama;Y. Maeda
在京都大学反应堆冷中子源的导流管出口安装了一台小角中子散射谱仪。在该光谱仪中，用双反射镍钛反射镜代替机械速度选择器作为单色器。用自行研制的二维位置灵敏探测器探测了散射中子。考虑到散射矢量的分辨率和散射中子强度之间的折衷，设计了光谱仪的几何结构。平均通量为5.5？在样品位置，分辨率为15%的中子数为3.9×104n·cm-2·S-1。覆盖的Q范围从0.004？-1到0.28？-1。在初步实验中，用生物分子铁蛋白检查了光谱仪的性能。结果表明，该光谱仪在大分子体系的结构分析中具有良好的性能。
A small-angle neutron scattering spectrometer has been installed at the exit of the guide tube glancing at the cold neutron source of Kyoto University Reactor. In this spectrometer, double-reflection Ni?Ti mirrors are used as a monochromator instead of a mechanical velocity selector. The scattered neutrons are detected by a 2-dimensional position-sensitive detector which has been developed by the authors. The geometry of the spectrometer is designed in consideration of the compromise between the resolution for scattering vectors and the intensity of scattered neutrons. The average flux of 5.5 ? neutrons with the resolution of 15% is 3.9 ?104 n?cm-2?s-1 at the sample position. The Q-range covered is from 0.004 ?-1 to 0.28 ?-1. In the preliminary experiments the performance of the spectrometer is checked with a biomolecule, ferritin. The results indicate that the spectrometer has an adequate performance for structure analysis of macromolecular systems.