High-resolution neutron powder diffractometer SPODI at research reactor FRM II

被引:213
作者
Hoelzel, M. [1 ,2 ]
Senyshyn, A. [1 ,2 ]
Juenke, N. [1 ]
Boysen, H. [3 ]
Schmahl, W. [3 ]
Fuess, H. [2 ]
机构
[1] Tech Univ Munich, Forsch Neutronenquelle Heinz Maier Leibnitz FRM I, D-85747 Garching, Germany
[2] Tech Univ Darmstadt, Fachbereich Mat & Geowissensch, D-64287 Darmstadt, Germany
[3] Univ Munich, Dept Geo & Umweltwissensch, Sekt Kristallographie, D-85747 Garching, Germany
关键词
Neutron diffraction; Powder diffraction; Neutron instrumentation; Multidetector; Powder diffractometer; DIFFRACTION;
D O I
10.1016/j.nima.2011.11.070
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
SPODI is a high-resolution thermal neutron diffractometer at the research reactor Heinz Maier-Leibnitz (FRM II) especially dedicated to structural studies of complex systems. Unique features like a very large monochromator take-off angle of 155 degrees and a 5 m monochromator-sample distance in its standard configuration achieve both high-resolution and a good profile shape for a broad scattering angle range. Two dimensional data are collected by an array of 80 vertical position sensitive He-3 detectors. SPODI is well suited for studies of complex structural and magnetic order and disorder phenomena at non-ambient conditions. In addition to standard sample environment facilities (cryostats, furnaces, magnet) specific devices (rotatable load frame, cell for electric fields, multichannel potentiostat) were developed. Thus the characterisation of functional materials at in-operando conditions can be achieved. In this contribution the details of the design and present performance of the instrument are reported along with its specifications. A new concept for data reduction using a 2 theta dependent variable height for the intensity integration along the Debye-Scherrer lines is introduced. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:32 / 37
页数:6
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