X-ray diffraction topography using a diffractometer with a bendable monochromator at a synchrotron radiation source.

Area of Science:

• Materials Science
• Crystallography
• X-ray Optics

Background:

• Double-crystal X-ray topography is crucial for analyzing crystal defects and strain.
• Existing laboratory and synchrotron setups have limitations in versatility and image quality.

Purpose of the Study:

• To develop a versatile X-ray topographic instrument with high strain sensitivity.
• To achieve high-resolution imaging of diverse crystal types without compromising image size.

Main Methods:

• Comparison of laboratory- and synchrotron-based double-crystal topographic setups.
• Design and implementation of a novel instrument featuring a bendable, highly perfect silicon monochromator.

Main Results:

• The proposed instrument achieves high strain sensitivity across various crystal samples.
• Local adaptation of Bragg angles by the bendable monochromator effectively compensates for dispersion and sample bending.
• Undegraded image size is maintained throughout the topographic analysis.

Conclusions:

• A bendable monochromator is key to creating a versatile X-ray topography instrument.
• This approach enables detailed investigation of crystal properties with enhanced sensitivity and image fidelity.