The TPS soft x-ray bendable mirror clip design and slope error analysis.

Area of Science:

• Optics and Photonics
• Materials Science
• Synchrotron Radiation Technology

Background:

• Advanced soft x-ray beamlines require high-precision optical components.
• Mirror surface deformation during operation necessitates advanced compensation techniques.
• Existing alignment methods for bendable mirrors present challenges in achieving stringent optical performance criteria.

Purpose of the Study:

• To investigate the impact of varying bolt joint forces on mirror surface deformation.
• To determine optimal force application for minimizing residual slope errors in bendable mirrors.
• To provide guidance for experimental setup and safe mounting of optical components in synchrotron beamlines.

Main Methods:

• Finite element method (FEM) simulations to model mirror deformation under different bolt forces.
• Experimental validation using a calibrated torque wrench for precise force application.
• Continuous slope error measurement with a long trace profiler to assess optical performance.

Main Results:

• Identified specific bolt joint force distributions that effectively compensate for high-order residual deformations.
• Achieved significant reduction in slope error, meeting the performance criterion of ±1.5 × 10-6 rad.
• Determined optimal configurations for maximizing the functional optical area of the mirrors.

Conclusions:

• Bolt joint force control is critical for high-accuracy figure control of bendable mirrors.
• FEM simulations accurately predict deformation, guiding experimental optimization.
• The study provides a practical methodology for enhancing optical performance in soft x-ray beamlines.