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UV–Vis Spectrometers01:14

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Related Experiment Video

Updated: Feb 17, 2026

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
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A high precision flat crystal spectrometer compatible for ultra-high vacuum light source.

Y Yang1, J Xiao1, D Lu1

  • 1Shanghai EBIT Laboratory, Institute of Modern Physics, Fudan University, Shanghai 200433, China.

The Review of Scientific Instruments
|December 3, 2017
PubMed
Summary

A new flat crystal spectrometer (FCS) was developed to improve upon earlier designs, offering enhanced performance for X-ray measurements. This advanced spectrometer achieves a high resolving power, enabling more precise analysis of spectral lines from various sources.

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Area of Science:

  • Atomic Physics
  • X-ray Spectroscopy
  • Plasma Physics

Background:

  • Early flat crystal spectrometers (FCS) suffered from oil contamination and limited detector-to-crystal distance.
  • These limitations hindered precise X-ray spectral analysis and source characterization.

Purpose of the Study:

  • To develop an improved FCS addressing previous design limitations.
  • To enhance spectral resolution and measurement capabilities for X-ray sources.

Main Methods:

  • A novel FCS design incorporating a differentially pumped rotary feedthrough and extendable bellows.
  • Utilized double detectors for Bond method and double-crystal measurements.
  • Performed off-line tests with titanium Kα X-rays and on-line measurements with He-like argon ions at Shanghai EBIT.

Main Results:

  • Achieved a vacuum better than 6 × 10-10 Torr, compatible with ultra-high vacuum light sources.
  • Measured spectral line broadening of 0.869 eV, yielding a resolving power of 3600.
  • Simulations predicted a nominal resolving power of 6500 due to an increased crystal-to-detector distance.

Conclusions:

  • The new FCS design successfully overcomes previous limitations, offering superior performance.
  • The enhanced resolving power enables more accurate characterization of X-ray sources and spectral analysis.
  • This advanced spectrometer is suitable for direct coupling with ultra-high vacuum light sources for detailed plasma diagnostics.