Monolithic two-dimensional beam compressor for hard x-ray beams
| Autor: | Tilo Baumbach, Petr Mikulík, Claudio Ferrari, Lukas Helfen, D. Korytár, Nicola Verdi, P. Vagovič, Alan Kuběna |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
010302 applied physics
Physics Diffraction Beam diameter Acoustics and Ultrasonics business.industry 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Beam tracing Surfaces Coatings and Films Electronic Optical and Magnetic Materials Monocrystalline silicon Optics Beamline 0103 physical sciences Physics::Accelerator Physics Laser beam quality 0210 nano-technology business Beam (structure) Beam divergence |
| Zdroj: | Journal of Physics D: Applied Physics. 38:A208-A212 |
| ISSN: | 1361-6463 0022-3727 |
| DOI: | 10.1088/0022-3727/38/10a/040 |
| Popis: | Using asymmetric diffraction in grazing incidence or in grazing emergence it is possible to expand or compress an x-ray beam in one dimension. Combining two asymmetric diffractions with non-coplanar planes of diffraction it is possible to obtain two-dimensional beam expansion or compression. This paper reports on a monolithic two-dimensional x-ray beam compressor consisting of two non-coplanar asymmetrically inclined {311} diffractors prepared in one silicon crystal block and tested at Optics beamline BM05 at ESRF, Grenoble. The design of the x-ray beam compressor, the results of beam tracing image simulation, the experimental arrangement used for testing and the properties of the x-ray microbeams formed are presented. For the beam energy of 9.5 keV 10- and 13-times beam compression in two directions was observed. Using a metal grid in the incident beam more than 400 microbeams smaller than 10 µm and separated by less than 5 µm were obtained in the outgoing beam. A gain of up to 100 times in intensity per unit area was obtained in comparison with the x-ray beam magnifier geometry, demonstrating a real two-dimensional beam compression. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|