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High-resolution receiving optics for SmartLab X-ray diffraction system with a Hybrid Pixel Array Multi-Dimensional Detector (HyPix): HyRES220, HyRES400

Winter 2021 Volume 37, No. 1
26-29
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Diffraction-based characterization of epitaxial thin films, such as the measurement of the composition, strain, and lattice constants, requires complicated alignment processes of the X-ray optics. Rigaku’s multipurpose X-ray diffractometer, “SmartLab,” features an automatic alignment function, which greatly simplifies the process. However, it still requires a timeconsuming re-alignment process when, for example, switching the optics between the standard and the highresolution optical systems, which use the slits and an analyzer crystal, respectively.

Generally, before the measurement of a sample with high crystallinity, such as a single crystal substrate or an epitaxial film, it is necessary to adjust the crystal orientation of the sample so that the measurement direction with a goniometer matches the crystal orientation. This procedure, called “axial adjustment,” sometimes requires a modest resolution optics because the reflections can be difficult to find when the crystal orientation is tilted or the lattice constants are different from the literature values. There are also some types of measurements that do not require the high-resolution optics. Therefore, the ability to switch between the slit optical system, which has a relatively low resolution, for the axial adjustment and the high-resolution analyzer-crystal optical system for actual data collection will enhance the efficiency of the whole process.

The HyRES has been designed to simplify this switching process. This is a receiving optical device that has two optical paths: a slit optical system and a high-resolution optical system with an analyzer crystal.  When combined with the HyPix series multidimensional pixel detector, the HyRES unit allows the user to seamlessly switch between the two optical systems through software control without a need of switching the optics hardware.

In this article, the principle and the features of the HyRES unit will be introduced with some analysis examples.
 

 

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