Open AccessDevelopment of a compact six‐circle goniometer
Author(s) -
Tweet D. J.,
Oyanagi H.
Publication year - 1998
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049597018098
Subject(s) - goniometer , optics , diffractometer , diffraction , dichroic glass , cryostat , materials science , physics , scanning electron microscope , superconductivity , quantum mechanics
A compact versatile six‐axis goniometer has been built which can be used with the scattering plane vertical or horizontal for anomalous X‐ray diffraction and diffraction X‐ray absorption fine structure using a tunable X‐ray undulator at SPring‐8. The diffractometer consists of a four‐circle goniometer for the standard ω, 2θ, ϕ and χ motions and a two‐circle goniometer on the 2θ arm for mounting the detector and analyser crystal. The goniometer is controlled via Ethernet, and standard data‐acquisition software with a graphical user interface has been developed. A closed‐cycle helium cryostat is mounted on the ω axis for temperature‐dependent experiments from 330 K to 14 K. Preliminary experiments on a Bi 2 Sr 2 CaCu 2 O 8 single crystal demonstrate the performance. Superstructure peaks due to the one‐dimensional spatial modulations in the b axis were recorded as a function of temperature above 20 K using an image plate.