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Related Concept Videos

Determination of Crystal Structures01:29

Determination of Crystal Structures

In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
X-ray Crystallography02:18

X-ray Crystallography

The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
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Related Experiment Video

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Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
06:46

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Published on: August 25, 2016

Diffractive-refractive optics: (+,-,-,+) X-ray crystal monochromator with harmonics separation.

Jaromír Hrdý1, Petr Mikulík, Peter Oberta

  • 1Institute of Physics, Academy of Sciences of the Czech Republic v.v.i., Na Slovance 2, CZ-18221 Praha 8, Czech Republic. hrdy@fzu.cz

Journal of Synchrotron Radiation
|February 22, 2011
PubMed
Summary

A novel X-ray monochromator design spatially separates X-ray harmonics using inclined crystal surfaces and wavelength-dependent refraction. This technique effectively isolates different harmonic wavelengths for advanced X-ray applications.

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Area of Science:

  • Physics
  • Crystallography
  • Optics

Background:

  • X-ray monochromators are crucial for selecting specific wavelengths in X-ray experiments.
  • Separating X-ray harmonics is challenging but essential for high-resolution studies.
  • Existing methods often lack efficient spatial separation of harmonics.

Purpose of the Study:

  • To propose a new design for a two-crystal X-ray monochromator.
  • To achieve spatial separation of X-ray harmonics.
  • To demonstrate the feasibility of the proposed design.

Main Methods:

  • Utilizing a two-channel-cut crystal X-ray monochromator in a dispersive (+,-,-,+) configuration.
  • Orienting diffracting surfaces for inclined diffraction.
  • Leveraging wavelength-dependent refractive properties for sagittal deviation.

Main Results:

  • The proposed design achieves spatial separation of X-ray harmonics.
  • Sagittal deviation is wavelength-dependent, being significantly higher for the first harmonic compared to higher harmonics.
  • Ray-tracing simulations support the theoretical concept and predicted performance.

Conclusions:

  • The novel X-ray monochromator design offers an effective method for spatial harmonic separation.
  • This technique enhances the purity of selected X-ray wavelengths.
  • The design holds promise for improving X-ray spectroscopy and diffraction techniques.