Current Issue : April - June Volume : 2012 Issue Number : 2 Articles : 4 Articles
A new versatile tool, combining Shear Force Microscopy and X-Ray Spectroscopy was designed and constructed to\r\nobtain simultaneously surface topography and chemical mapping. Using a sharp optical fiber as microscope probe,\r\nit is possible to collect locally the visible luminescence of the sample. Results of tests on ZnO and on ZnWO4 thin\r\nlayers are in perfect agreement with that obtained with other conventional techniques. Twin images obtained by\r\nsimultaneous acquisition in near field of surface topography and of local visible light emitted by the sample under\r\nX-Ray irradiation in synchrotron environment are shown. Replacing the optical fibre by an X-ray capillary, it is\r\npossible to collect local X-ray fluorescence of the sample. Preliminary results on Co-Ti sample analysis are\r\npresented....
A summary of focusing X ray polycapillary optics is presented including history, theory, modeling, and applications development.\r\nThe focusing effects of polycapillary optics come from the overlap of the beams from thousands of small hollow glass tubes.\r\nModeling efforts accurately describe optics performance to allow for system development in a wide variety of geometries. The\r\nfocusing of X ray beams with polycapillary optics yields high gains in intensity and increased spatial resolution for a variety of\r\nclinical, lab-based, synchrotron or in situ analysis applications....
Total-external-reflection Kirkpatrick-Baez mirror optics for high-energy X-rays have been applied to the X-ray microprobe at\r\nbeamline 37XU of SPring-8. A focused beam size of 1.0 Ã?µm (V)Ã?â??0.83 Ã?µm (H) has been achieved at an X-ray energy of 30 keV, and\r\na total photon flux of the focused beam was about 5 Ã?â?? 109 photons/s. Micro-X-ray fluorescence (Ã?µ-XRF) analysis of the uranium\r\ndistribution in rat kidneys has been performed with the mirror-focused beam. The sensitivity of uranium was evaluated from the\r\nXRF intensity of thin standard samples, and the minimum detection limit was estimated at 10 Ã?µg/g. The high-spatial-resolution\r\nanalysis revealed that uranium was concentrated in the epithelium of the proximal tubules in the inner cortex. The maximum\r\nconcentration of uranium in the tubule was estimated to be 503 Ã?µg/g using a semiquantitative evaluation....
Silicon Pore Optics (SPO) is a new X-ray optics technology under development in Europe, forming the ESA baseline technology\r\nfor the International X-ray Observatory candidate mission studied jointly by ESA, NASA, and JAXA.With its matrix-like structure,\r\nmade of monocrystalline-bonded Silicon mirrors, it can achieve the required angular resolution and low mass density required for\r\nfuture large X-ray observatories. Glass-based Micro Pore Optics (MPO) achieve modest angular resolution compared to SPO, but\r\nare even lighter and have achieved sufficient maturity level to be accepted as the X-ray optic technology for instruments on board\r\nthe Bepi-Colombo mission, due to visit the planet Mercury. Opportunities for technology transfer to ground-based applications\r\ninclude material science, security and scanning equipment, and medical diagnostics. Pore X-ray optics combine high performance\r\nwith modularity and economic industrial production processes, ensuring cost effective implementation....
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