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Development of variable-magnification X-ray Bragg optics.

Keiichi Hirano¹, Yoshiki Yamashita¹, Yumiko Takahashi¹

¹Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan.

Journal of Synchrotron Radiation

|July 3, 2015

Summary

A new X-ray Bragg optics system offers variable magnification for X-ray beams. This system uses two crossed magnifiers, allowing magnification control via azimuth angles, enabling tunable X-ray imaging.

Keywords:

X-ray magnifier dynamical diffraction image processing imaging variable-magnification

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Area of Science:

Optics and Photonics
Materials Science
X-ray Physics

Background:

X-ray optics are crucial for high-resolution imaging.
Existing X-ray magnification techniques often lack flexibility.
Developing variable-magnification X-ray optics is essential for advanced applications.

Purpose of the Study:

To propose and demonstrate a novel X-ray Bragg optics system for variable magnification.
To analyze the optical properties based on dynamical X-ray diffraction theory.
To verify the system's feasibility and performance in experimental settings.

Main Methods:

Designing a crossed arrangement of two X-ray Bragg magnifiers.
Controlling magnification by adjusting the azimuth angle of each magnifier.
Utilizing dynamical theory of X-ray diffraction for property analysis.
Experimental verification at the Photon Factory's BL-14B beamline using Si(220) crystals.

Main Results:

The proposed X-ray Bragg optics system achieves tunable magnification between 0.1 and 10.0.
Experimental validation confirmed the system's functionality with X-ray images of a nylon mesh.
Image deformation was successfully corrected using a transformation matrix and bilinear interpolation.
Both absorption-contrast and Fresnel diffraction edge-contrast were observed.

Conclusions:

The novel X-ray Bragg optics system provides a flexible and effective method for variable X-ray beam magnification.
The system demonstrates potential for advanced X-ray imaging applications requiring adjustable magnification.
The theoretical framework and experimental results support the practical implementation of this optics design.