A double-crystal bent Laue parallel-beam compressor

Area of Science:

• Physics
• Materials Science
• Imaging Technology

Background:

• Synchrotron X-ray sources are crucial for advanced imaging.
• Current methods for manipulating X-ray beams have limitations in intensity and flexibility.
• Computed tomography (CT) of small samples requires optimized X-ray beam characteristics.

Purpose of the Study:

• To demonstrate a novel method for manipulating synchrotron X-ray beam size.
• To create a compressed, nearly parallel X-ray beam with a desirable aspect ratio for CT.
• To enhance the utility and flexibility of bend-magnet (BM) beamlines at synchrotron facilities.

Main Methods:

• Utilized a pair of cylindrically bent Laue crystals to compress the X-ray beam horizontally.
• Maintained a nearly parallel beam profile after compression.
• Applied the compressed beam to perform computed tomography (CT) on multiple small samples.

Main Results:

• Successfully compressed the synchrotron X-ray beam horizontally while preserving parallelism.
• Achieved a higher intensity beam in a smaller imaging area compared to collimation.
• Demonstrated the proof-of-principle for CT of small samples using the compressed beam.
• Showcased the ability to bridge the intensity gap between BM and insertion-device beamlines.

Conclusions:

• The developed crystal-based optical system effectively compresses synchrotron X-ray beams for improved CT.
• This method offers increased flexibility and intensity for BM beamlines, enhancing CT capabilities.
• The system produces a spectral beam with potential for future investigations.