Surface profiling of X-ray mirrors for shaping focused beams

Area of Science:

• Optics and X-ray instrumentation
• Materials science and surface engineering
• Synchrotron radiation applications

Background:

• Grazing incidence mirrors are essential for focusing X-rays in scientific experiments.
• Active mirrors offer adjustable surface profiles for X-ray beam shaping.
• Beam striations from polishing errors limit the routine use of active mirrors.

Purpose of the Study:

• To develop a novel surface modification for active X-ray mirrors.
• To mitigate beam striations caused by unavoidable polishing errors.
• To enable precise X-ray beam shaping for synchrotron applications.

Main Methods:

• Design of re-entrant (concave-convex) surface profiles.
• Development of a construction method for continuous height and slope surfaces.
• Ray tracing and wave propagation simulations to validate the design.

Main Results:

• The proposed re-entrant surface modifications effectively shape X-ray beams into a top-hat profile.
• Simulations confirm a significant reduction in beam striations.
• A mirror system capable of producing vertical beam sizes from 0.5 to 10μm was designed.

Conclusions:

• Re-entrant surface modifications offer a viable solution for high-quality X-ray beam shaping.
• The developed method addresses limitations of active mirrors in synchrotron beamlines.
• A prototype is expected to enhance capabilities across various X-ray applications.