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Double-slit dynamical diffraction of X-rays in ideal crystals (Laue case)
1Yerevan State University, Faculty of Physics, Department of Solid State Physics, Solid State Physics Research Laboratory, Armenia. mbalyan@ysu.am
Acta Crystallographica. Section A, Foundations of Crystallography
|October 22, 2010
Summary
Theoretical X-ray diffraction in crystals creates interference fringes. Fringe visibility depends on beam coherence, polarization, slit size, and source-crystal distance, enabling new X-ray interferometer designs.
Area of Science:
- Solid State Physics
- Crystallography
- Optics
Background:
- Young's double-slit experiment demonstrates light interference.
- Dynamical X-ray diffraction (DXD) is crucial for understanding X-ray behavior in crystals.
Purpose of the Study:
- To theoretically investigate double-slit dynamical X-ray diffraction in ideal crystals.
- To analyze factors affecting interference fringe visibility and potential applications.
Main Methods:
- Theoretical modeling of X-ray diffraction through a double-slit system in an ideal crystal.
- Derivation of an expression for the interference fringe period.
- Analysis of fringe visibility based on incident beam properties and experimental parameters.
Main Results:
- Formation of interference fringes, analogous to Young's fringes, on the crystal's exit surface.
- An expression for the fringe period was derived.
- Fringe visibility is influenced by temporal and spatial coherence, polarization, slit size, Bragg angle deviation, and source-crystal distance.
Conclusions:
- The study confirms the formation of interference fringes in double-slit dynamical X-ray diffraction.
- The findings provide a basis for developing novel X-ray interferometers, including Rayleigh and Michelson types.
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