Construction of topography stations at SPring-8 and first observations

Abstract

Two topography experimental stations are presently available at SPring-8. The first, constructed at the short-length bending magnet beam line BL28, is designed to perform white- and selected wide-energy-range x-ray topography. The other is a high-resolution diffraction topography station located on the medium-length bending magnet beam line BL20, where the incoming beam displays a large cross section and high degree of parallelism. This allows us to observe fine structures of three-dimensionally large crystals used in industry if high energy is employed. The construction concepts, as well as first, selected experimental results are presented.

Twinning in La0.95Sr0.05Ga0.9Mg0.1O2.92crystal studied by white-beam (Laue) X-ray microdiffraction

“…The disadvantage of this technique is that it is destructive, requires careful sample preparation and is restricted to very small areas of the sample. Recently, white-beam X-ray diffraction topography using synchrotron radiation sources turned out to be a simple, fast and ef®cient imaging technique for the investigation of domain structures (Yao et al, 1991;Huang et al, 1996;Medrano et al, 1999;Chikaura et al, 2001). Information regarding twin laws and twin distribution can be simultaneously obtained from a large area of the specimen.…”

Evaluation of Internal Stress in Individual Grains of Cold-Rolled Stainless Steel by Energy Dispersive X-ray Diffraction

“…EXDM was developed at white X-ray diffraction beamline BL28B2 of SPring-8 14) because high flux white X-ray source was necessary to form white X-ray micro beam. This technique was based on the spectro-scattering topography developed by Chikaura et al in this beamline.…”

Development of visualization method of grain boundaries in stainless steel by using white X‐ray micro‐beam and image detector

“…5. The experiment was performed at BL28B2 in SPring‐8 4. The effective energy range of white X‐rays passed through the sample is higher than 50 keV.…”