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

Hoelzel, Markus; Senyshyn, Anatoliy; Juenke, N.; Boysen, Hans; Schmahl, Wolfgang W. und Fuess, H. (2012): High-resolution neutron powder diffractometer SPODI at research reactor FRM II. In: Nuclear Instruments and Methods in Physics Research Section A - Accelerators Spectrometers Detectors and Associated Equipment, Bd. 667: S. 32-37

Abstract

SPODI is a high-resolution thermal neutron diffractometer at theresearch reactor Heinz Maier-Leibnitz (FRM II) especially dedicated tostructural studies of complex systems. Unique features like a very largemonochromator take-off angle of 155 degrees and a 5 mmonochromator-sample distance in its standard configuration achieve bothhigh-resolution and a good profile shape for a broad scattering anglerange. Two dimensional data are collected by an array of 80 verticalposition sensitive He-3 detectors. SPODI is well suited for studies ofcomplex structural and magnetic order and disorder phenomena atnon-ambient conditions. In addition to standard sample environmentfacilities (cryostats, furnaces, magnet) specific devices (rotatableload frame, cell for electric fields, multichannel potentiostat) weredeveloped. Thus the characterisation of functional materials atin-operando conditions can be achieved. In this contribution the detailsof the design and present performance of the instrument are reportedalong with its specifications. A new concept for data reduction using a2 theta dependent variable height for the intensity integration alongthe Debye-Scherrer lines is introduced.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Geowissenschaften > Department für Geo- und Umweltwissenschaften > Kristallographie und Materialwissenschaft
• Themengebiete: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
• Sprache: Englisch