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AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
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Temperature-gradient analyzers for non-resonant inelastic X-ray scattering.

Daisuke Ishikawa1, Alfred Q R Baron1

  • 1Materials Dynamics Laboratory, RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan.

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Temperature gradients significantly enhance energy resolution in scattering measurements by compensating for geometric effects. This allows for improved performance and larger sample environments in synchrotron radiation analysis.

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Area of Science:

  • Synchrotron Radiation Analysis
  • Materials Science
  • Spectroscopy

Background:

  • Geometric contributions often limit energy resolution in scattering experiments.
  • Temperature-gradient analyzers offer a novel approach to mitigate these limitations.

Purpose of the Study:

  • To detail the fabrication and performance of temperature-gradient analyzers.
  • To extend their application to quadratic and 2D gradients.
  • To demonstrate significant improvements in energy resolution.

Main Methods:

  • Simulations and experimental validation of temperature-gradient analyzers.
  • Application of linear and quadratic temperature gradients (e.g., 1.32 K/80 mm).
  • Utilizing dispersion compensation with position-sensitive detectors.

Main Results:

  • Achieved energy resolution improvements from 60 to 25 meV near backscattering.
  • Observed resolution enhancement from 330 to 32 meV further from backscattering.
  • Maintained a large solid angle collection (∼50 mrad × 50 mrad).

Conclusions:

  • Temperature gradients effectively compensate for geometric broadening in energy resolution.
  • The method allows for substantial resolution improvements across different scattering geometries.
  • Enables larger sample clearances for complex experimental setups.