| Autor: |
M. A. Kumakhov, A. A. Bolotokov, S. V. Nikitina, A.D. Zvonkov, N. S. Ibraimov, E. V. Likhoushina, M. V. Yudina, A. V. Lyuttsau |
| Rok vydání: |
2005 |
| Předmět: |
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| Zdroj: |
SPIE Proceedings. |
| ISSN: |
0277-786X |
| Popis: |
The paper presents development of a high-performance monochromator creating a parallel x-ray beam. Monochromator was developed on the basis of Kumakhov polycapillary optics. Quasi-parallel beams are formed by Kumakhov x-ray half-lenses and had divergence of ~12' for Cu line. Work was done using Si wafers with shear planes (111) and (001), the surface layers of which were subjected to distortions through grinding with diamond powders with different grain size. Drastic increase of the integral intensity of diffraction maximum was observed when the angle of disorientation in the objects matched x-ray beam divergence. In this instance, half-width of the maximum grows up as well. The efficiency of Si(111) monochromator with treated surface is 3 times less than the efficiency of graphite monochromator, but divergence a of the beam obtained is more than twice better compared with the beam after graphite monochromator. A similar picture is also observed in case of non-kinematics scheme of exposure with x-ray diffractometer/sorter based on a polycapillary lens. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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