Monolithic two-dimensional beam compressor for hard x-ray beams
| Authors | |
|---|---|
| Year of publication | 2005 |
| Type | Article in Periodical |
| Magazine / Source | J. Phys. D: Appl. Phys. |
| MU Faculty or unit | |
| Citation | |
| Web | http://www.sci.muni.cz/~mikulik/Publications.html#KorytarBaumbachFerrari-JPD-2005 |
| Field | Solid matter physics and magnetism |
| Keywords | x-ray optics; magnifier; demagnifier; synchrotron radiation |
| Description | 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 um and separated by less than 5 um 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. |
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