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

页码：91 / 97

页数：7

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