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X-ray interferometry with microelectronvolt resolution.

Yu V Shvyd'ko1, M Lerche, H-C Wille

  • 1Institut für Experimentalphysik, Universität Hamburg, D-22761 Germany. Yuri.Shvydko@desy.de

Physical Review Letters
|February 7, 2003
PubMed
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Researchers developed a novel hard x-ray interferometer using sapphire crystal mirrors. This prototype x-ray Fabry-Pérot interferometer achieved a finesse of 15, demonstrating its potential for advanced x-ray applications.

Area of Science:

  • Physics
  • Optics
  • Materials Science

Background:

  • Hard x-ray interferometry is crucial for high-resolution material analysis and fundamental physics research.
  • Existing interferometers face limitations in stability and resolution for hard x-ray applications.

Purpose of the Study:

  • To demonstrate a novel hard x-ray interferometer utilizing back-reflecting sapphire crystal mirrors.
  • To characterize the performance of this prototype x-ray Fabry-Pérot interferometer.

Main Methods:

  • Fabrication of a prototype x-ray Fabry-Pérot interferometer using two back-reflecting sapphire crystal mirrors.
  • Measurement of transmission resonances via the interferometer's time response.
  • Direct observation of interference patterns in spectral reflectivity.

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Main Results:

  • Achieved a finesse of 15 for the x-ray Fabry-Pérot interferometer.
  • Measured transmission resonances with a width of 0.76 micro-electronvolts (µeV).
  • Successfully observed interference patterns in the spectral dependence of reflectivity.

Conclusions:

  • The demonstrated hard x-ray Fabry-Pérot interferometer shows promising performance.
  • Sapphire crystal mirrors are effective for constructing high-finesse x-ray interferometers.
  • This technology has potential for advanced spectroscopic and imaging applications in hard x-ray science.