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Related Experiment Videos

Asymmetric Fraunhofer diffraction from roller-blade slits.

J L Libbert1, J A Pitney, I K Robinson

  • 1Department of Physics, University of Illinois, Urbana, IL 61801, USA.

Journal of Synchrotron Radiation
|May 1, 1997
PubMed
Summary

New precision apertures using molybdenum rods enable coherent X-ray diffraction experiments. This advancement accounts for inherent asymmetry, improving data analysis for synchrotron radiation applications.

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Area of Science:

  • Physics
  • Materials Science
  • Optics

Background:

  • Coherent X-ray diffraction (CXD) experiments require advanced apparatus due to new synchrotron radiation sources.
  • Existing experimental setups face challenges in precision and data interpretation.

Purpose of the Study:

  • To design and test a novel precision aperture for coherent X-ray diffraction.
  • To address the challenges posed by experimental apparatus demands in CXD.

Main Methods:

  • Development of a precision aperture utilizing polished molybdenum rods as slit blades.
  • Characterization of the aperture's performance under experimental conditions.
  • Modification of the Fraunhofer diffraction function to account for device asymmetry.

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Main Results:

  • The designed aperture demonstrates effective use of molybdenum rods for slit blades.
  • The device exhibits inherent asymmetry, which is accurately modeled.
  • Initial testing confirms the viability of the aperture for CXD experiments.

Conclusions:

  • The developed precision aperture is suitable for demanding coherent X-ray diffraction experiments.
  • The simple modification to the Fraunhofer diffraction function accurately corrects for the aperture's asymmetry.
  • This innovation supports advancements in synchrotron radiation-based research.