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@article{593644, author = {Hrdý, J. and Kuběna, Alan and Mikulík, Petr}, article_location = {Velká Britanie}, article_number = {24}, keywords = {x-ray optics; x-ray diffraction; synchrotron radiation}, language = {eng}, issn = {0022-3727}, journal = {J. Phys. D: Appl. Phys.}, title = {Aberrations of diffractive-refractive optics: Bragg-case sagittal focusing of multiple parabolic elements}, url = {http://www.sci.muni.cz/~mikulik/Publications.html#HrdyKubenaMikulik-JPD-2005}, volume = {38}, year = {2005} }
TY - JOUR ID - 593644 AU - Hrdý, J. - Kuběna, Alan - Mikulík, Petr PY - 2005 TI - Aberrations of diffractive-refractive optics: Bragg-case sagittal focusing of multiple parabolic elements JF - J. Phys. D: Appl. Phys. VL - 38 IS - 24 SP - 4325-4328 EP - 4325-4328 PB - IOP Publishing Ltd SN - 00223727 KW - x-ray optics KW - x-ray diffraction KW - synchrotron radiation UR - http://www.sci.muni.cz/~mikulik/Publications.html#HrdyKubenaMikulik-JPD-2005 N2 - The diffractive-refractive optical device consisting of four crystals in (+,-,-,+) setting with longitudinal parabolic grooves has a geometrical aberration which influences the achievable focus size. This aberration is discussed analytically by using a new, more precise formula for the calculation of focusing distance, which respects the finite distance between optical elements. The calculation of the intensity distribution surrounding the focus is illustrated by a ray-tracing method based on the dynamical theory of diffraction. It demonstrates an achievable focus size. Finally we discuss that this aberration may be suppressed by the slight narrowing of the groove profile. In particular, the parameter a in the equation of parabola has to slightly grow with x. A practical application may require an ultra-precise fabrication of the grooves. ER -
HRDÝ, J., Alan KUBĚNA a Petr MIKULÍK. Aberrations of diffractive-refractive optics: Bragg-case sagittal focusing of multiple parabolic elements. \textit{J. Phys. D: Appl. Phys.}. Velká Britanie: IOP Publishing Ltd, 2005, roč.~38, č.~24, s.~4325-4328. ISSN~0022-3727.
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