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X-ray Crystallography02:18

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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.
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Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
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Beam-induced damage on diffractive hard X-ray optics.

K Nygård1, S Gorelick, J Vila-Comamala

  • 1Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland. kim.nygard@psi.ch

Journal of Synchrotron Radiation
|October 27, 2010
PubMed
Summary
This summary is machine-generated.

This study investigates X-ray beam damage to diffractive optics. Results show varying damage levels in different grating types under ambient and inert conditions, impacting optical performance.

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Area of Science:

  • Materials Science
  • Optics
  • Physics

Background:

  • High-power X-ray beams can induce damage in diffractive optics.
  • Understanding this damage is crucial for the reliability of X-ray instrumentation.

Purpose of the Study:

  • To systematically study the radiation damage induced by high-power X-ray beams on diffractive hard X-ray optics.
  • To compare damage in ambient versus inert atmospheres.
  • To evaluate damage in gratings fabricated using different techniques.

Main Methods:

  • Investigated beam-induced damage on electroplated Au gratings (with/without polymer mold) and Ir-coated Si gratings.
  • Conducted experiments in both ambient and inert atmospheres.
  • Monitored damage using X-ray diffraction and evaluated it with scanning electron microscopy.

Main Results:

  • Observed and quantified beam-induced damage in the studied diffractive optics.
  • Damage levels varied depending on the grating material, fabrication method, and atmospheric conditions.
  • Scanning electron microscopy revealed microstructural changes consistent with radiation damage.

Conclusions:

  • Beam-induced damage is a significant factor affecting the performance and longevity of hard X-ray optics.
  • Atmospheric conditions play a role in the extent of radiation damage.
  • Different grating fabrication techniques result in varying radiation resistance.