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Related Concept Videos

X-ray Crystallography02:18

X-ray Crystallography

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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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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
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Crystal Field Theory
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Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
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Related Experiment Video

Updated: Feb 4, 2026

Improving High Viscosity Extrusion of Microcrystals for Time-resolved Serial Femtosecond Crystallography at X-ray Lasers
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Elliptically bent crystal x-ray spectrometer for time-resolved laser plasma experiments.

R R Wang1, H H An1, E F Guo1

  • 1Shanghai Institute of Laser Plasma, Shanghai 201800, China.

The Review of Scientific Instruments
|October 4, 2018
PubMed
Summary

A new elliptically bent crystal spectrometer measures X-rays for fusion energy experiments. This device achieves high spectral resolution, enabling precise time-resolved spectral measurements crucial for understanding radiation sources.

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Area of Science:

  • Physics
  • Spectroscopy
  • Fusion Energy

Background:

  • Accurate time-resolved spectral measurements are essential for inertial confinement fusion (ICF) and radiation source development.
  • Existing methods may lack the required resolution or diagnostic capabilities for complex plasma conditions.

Purpose of the Study:

  • To design and validate an elliptically bent crystal spectrometer for measuring time-resolved X-ray spectra.
  • To achieve high spectral resolution (E/δE ∼500) in the 2.5-11.0 keV energy range.

Main Methods:

  • Utilized an elliptically bent crystal spectrometer with four different lattice spacings.
  • Employed Bragg reflection of X-rays from a source at one ellipse focus to the second focus, coupled to a streak camera.
  • Developed an alignment method based on the elliptical axis for precise source-crystal-camera coupling.

Main Results:

  • The spectrometer measures X-rays in the 2.5-11.0 keV range with a spectral resolution of approximately 500.
  • Experimental tests at the Shenguang II laser facility confirmed performance close to theoretical predictions.
  • Demonstrated successful coupling of the X-ray source to the streak camera via the elliptical geometry.

Conclusions:

  • The developed elliptically bent crystal spectrometer is a viable tool for time-resolved spectral measurements in ICF and radiation source research.
  • The alignment method ensures optimal performance and tunability for different experimental setups.
  • The device offers a significant advancement in diagnosing high-energy X-ray emissions with temporal resolution.