Bent perfect crystals as X-ray focusing polychromators in symmetric Laue geometry

被引：5
|
作者：
Guigay, J. -P. [1 ]
Ferrero, C. [1 ]
Bhattacharyya, D. [2 ]
Mathon, O. [1 ]
Pascarelli, S. [1 ]
机构：
[1] European Synchrotron Radiat Facil, F-38043 Grenoble, France
[2] Bhabha Atom Res Ctr, Spect Div, Bombay 400094, Maharashtra, India
来源：
ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES | 2013年 / 69卷
关键词：
DYNAMICAL THEORY; SPHERICAL-WAVE; PENDELLOSUNG FRINGES; DIFFRACTION; OPTICS;
D O I：
10.1107/S0108767312044601
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The focusing properties of cylindrically bent crystals in symmetric Laue geometry are discussed using the formalism of Fresnel diffraction and the analytical solution of the Takagi-Taupin equations for a point source on the entrance surface. The existence of a focal shift in the dynamical focusing effect is pointed out and discussed. The present theoretical framework is applied to experiments performed at the energy-dispersive X-ray absorption spectroscopy beamline of the European Synchrotron Radiation Facility concerning the position and the size of the focal spot obtained from a polychromatic source at a large distance from the bent crystal.
引用
收藏
页码：91 / 97
页数：7
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