The small‐angle neutron scattering spectrometer at the National Bureau of Standards
The small‐angle neutron scattering spectrometer at the National Bureau of Standards
复制标题
国家标准局小角中子散射谱仪
DOI：
10.1107/s0021889886088994
复制
发表时间：
1986
影响因子：
6.1
通讯作者：
J. LaRock
中科院分区：
文献类型：
--
作者：
C. Glinka;J. M. Rowe;J. LaRock
在国家标准局研究堆上建造了一台小角中子散射谱仪，适用于研究10~1000 A范围内材料的结构和磁性不均匀性。该仪器长8 m，利用机械速度选择器和针孔准直提供波长在5~10 A之间变化的连续入射光束。中子探测器是一个65×65 cm的位置灵敏正比计数器，它绕样品位置转动以扩大光谱仪的角度范围。该仪器的独特功能包括用于高分辨率测量的多光束会聚准直系统和带有专用软件的交互式彩色图形终端，用于快速成像和分析来自二维探测器的数据。详细介绍了光谱仪和数据采集系统的设计和特点，并给出了数据实例，说明了它的性能。
A small-angle neutron scattering spectrometer, suitable for the study of structural and magnetic inhomogeneities in materials in the 10 to 1000 A range, has been constructed at the National Bureau of Standards Research Reactor. The instrument is 8 m long and utilizes a mechanical velocity selector and pinhole collimation to provide a continuous incident beam whose wavelength is variable from 5 to 10 A. The neutron detector is a 65 × 65 cm position-sensitive proportional counter which pivots about the sample position to extend the angular range of the spectrometer. Features unique to this instrument include a multibeam converging collimation system for high-resolution measurements and an interactive color graphics terminal with specialized software for the rapid imaging and analysis of data from the two-dimensional detector. The design and characteristics of the spectrometer and data acquisition system are described in detail and examples of data are presented which illustrate its performance.