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Related Concept Videos

IR Spectrometers01:25

IR Spectrometers

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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Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
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Six-reflection meV-monochromator for synchrotron radiation.

T S Toellner1, A Alatas, A H Said

  • 1Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA. toellner@anl.gov

Journal of Synchrotron Radiation
|June 21, 2011
PubMed
Summary

A new six-crystal design provides highly efficient, ultra-narrow bandwidths (meV and sub-meV) for synchrotron radiation. This advanced monochromatization scheme rivals single-crystal performance for X-ray applications.

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Area of Science:

  • Physics
  • Materials Science
  • Engineering

Background:

  • Synchrotron radiation requires precise energy selection for experiments.
  • Existing monochromatization techniques face limitations in bandwidth and efficiency.

Purpose of the Study:

  • To present an in-line monochromatization scheme for 10-40 keV synchrotron radiation.
  • To achieve meV and sub-meV bandwidths with high spectral efficiency.

Main Methods:

  • Utilizing a six-crystal reflection design.
  • Theoretical modeling and experimental validation of two device prototypes.

Main Results:

  • Demonstrated meV and sub-meV bandwidths.
  • Achieved high spectral efficiency, surpassing previous multicrystal designs.
  • Performance approaches that of single room-temperature back-reflecting crystals.

Conclusions:

  • The presented six-crystal design offers a highly efficient and precise monochromatization solution.
  • This technology enables advanced X-ray experiments requiring ultra-narrow bandwidths.