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

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.