Time-of-flight diffraction with multiple frame overlap Part II: The strain scanner POLDI at PSI
Time-of-flight diffraction with multiple frame overlap Part II: The strain scanner POLDI at PSI
复制标题
多帧重叠的飞行时间衍射第二部分：PSI 的应变扫描仪 POLDI
DOI：
10.1016/j.nima.2005.01.321
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发表时间：
2005
影响因子：
1.4
通讯作者：
W. Wagner
中科院分区：
文献类型：
--
作者：
U. Stuhr;H. Spitzer;J. Egger;A. Hofer;P. Rasmussen;D. Graf;A. Bollhalder;M. Schild;G. Bauer;W. Wagner
POLDI（脉冲重叠衍射仪）是PSI的多脉冲重叠衍射仪，主要用于应变扫描实验。多脉冲重叠法使得在连续中子源上建造飞行时间衍射仪成为可能，具有短飞行路径、高分辨率和高强度。布拉格反射的相对线宽的最佳可实现分辨率在1×10− 3和2×10−3之间，取决于晶格间距。本文介绍了该装置的总体布置以及时间聚焦结构中斩波器、中子镜和~ 3 He探测器的特点。通过应变场测量的例子讨论了该仪器的整体性能。
POLDI (Pulse-OverLap DIffractometer) is a multiple pulse-overlap diffractometer at PSI, which is designed mainly for strain-scanning experiments. The multiple pulse-overlap method made it possible to build a time-of-flight diffractometer at a continuous neutron source with short flight path, high resolution and high intensity. The best achievable resolutions for the relative linewidths of the Bragg reflections are between 1×10−3and 2×10−3, depending on the lattice spacing. The layout of the instrument and the features of the chopper, the neutron mirror and the3He detector in time-focusing geometry are presented. The overall performance of the instrument is discussed with examples of strain-field measurements.