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Long trace profiler downward- and sideways-facing measurement simulations.

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Measuring mirrors for advanced light sources is challenging in non-standard orientations. This study explores new optical metrology techniques to ensure precise mirror measurements, even when facing downwards or sideways.

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Area of Science:

  • Optics and Metrology
  • Accelerator Physics
  • Materials Science

Background:

  • Accelerator-based light sources demand high-precision mirrors for optimal X-ray beam quality.
  • Existing metrology methods often assume upward-facing mirror configurations, neglecting gravitational and mechanical effects in other orientations.
  • Diverse mirror mounting, such as in Kirkpatrick-Baez systems, necessitates adaptable metrology solutions.

Purpose of the Study:

  • To investigate alternative optical metrology geometries for measuring mirrors in side-facing and downward-facing orientations.
  • To adapt existing long trace profiler technology for non-standard mirror mounting configurations.
  • To evaluate the impact of motion-induced errors on measurement accuracy in realistic acquisition conditions.

Main Methods:

  • Optical ray tracing simulations were employed to model and analyze proposed metrology geometries.
  • A modified profilometry approach was developed, integrating beam folding optics with the European Synchrotron Radiation Facility long trace profiler.
  • Experimental characterization and alignment tolerance analysis were performed for downward-facing configurations.

Main Results:

  • A promising experimental solution was identified and characterized for downward-facing mirror metrology.
  • The proposed modified profilometry approach, combined with ray-tracing, accurately evaluates motion-induced errors.
  • Both side-facing and downward-facing configurations demonstrated sensitivity to scanning head motion errors.

Conclusions:

  • Alternative metrology geometries are feasible for measuring mirrors in non-traditional orientations for accelerator light sources.
  • The developed approach shows promise, particularly for downward-facing configurations, but requires careful consideration of alignment tolerances.
  • Further research is needed to overcome challenges related to motion errors for robust implementation in side-facing setups.