Toroidal Bend Graphite X-ray Monochomator.

Nishiki, Naomi; Kawashima, T.; Naka, Hiroyuki; Makino, Masashi; Matsubara, Eiichiro

doi:10.2320/materia.38.43

Cited by 5 publications

(2 citation statements)

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“…A 21 kW rotating-anode X-ray generator with a molybdenum target was adopted as an X-ray source. A cylindrically bent graphite crystal (Nishiki et al , 1999) with a 21 mm curvature radius (Matsushita Electric Co.) in Figure 2(b) was installed as an incident monochromator, so that high-intense monochromatic Mo K α radiation (17.44 keV) is focused at the sample. The focal length is 197 mm.…”

Section: Methodsmentioning

confidence: 99%

Development and application of laboratory X-ray fluorescence holography equipment

2004

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The X-ray fluorescence holography ͑XFH͒ method has drawn the attention of many researchers as a novel experimental technique for imaging a three-dimensional local atomic structure around a certain element in a single crystal. Synchrotron radiation ͑SR͒ has been mainly used for the measurements because of extremely weak signals that are about 0.3% of isotropic fluorescent radiation. The measurements limited to the use of a SR source clearly hinder from increasing the number of the users. Thus, we developed a laboratory XFH equipment with a conventional X-ray source by using a singly bent graphite monochromator with a large curvature and X-ray detector for a high counting rate. With this equipment, we have successfully demonstrated that high-quality hologram data of a gold single crystal almost equivalent to those with a SR source are obtained. Four different holograms are recorded in the normal and inverse XFH modes. An atomic image reconstructed from these holograms patterns shows a distinct atomic image of Au. © 2004 International Centre for Diffraction Data.

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Section: Methodsmentioning

confidence: 99%

Development and application of laboratory X-ray fluorescence holography equipment

2004

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“…In addition, in order to prevent to frost, it is placed in the small chamber with an X-ray window of 7.5 mm thick polyimide film. A singly bent graphite single crystal [21] with a 25-mm radius (Matsushita Electric Co.) in Fig. 4(b) was adopted as an analyzer.…”

Section: Technical Improvementmentioning

confidence: 99%

Development of a new holographic method with resonant X-ray scattering

Takahashi

Hayashi

Matsubara

2003

Science and Technology of Advanced Materials

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Complex X-ray holography (CXH) using resonant scattering is proposed as a new atomic resolution holography method. CXH provides us a solution for the twin-image problem as well as elemental identification in real space. Accurate differences among intensities recorded at several X-ray energies around an absorption edge must be experimentally obtained in the CXH method. Taking into account that the holographic signal is of the order of 0.1% of its background, we find it difficult to carry out using ordinary technique for hologram measurement. Thus, in order to measure holograms with a very good S/N ratio, a sample was cooled about 100 K and fluorescent X-rays were focused on a detector with a cylindrical graphite analyzer in the X-ray fluorescence holography apparatus at SPring-8. Ga fluorescent holograms of GaAs were recorded at energies near the As K absorption edge. A change of holographic oscillations due to the resonant scattering, which is expected from the computer simulation, was firstly observed. q

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