An ultra-high-stability four-axis ultra-high-vacuum sample manipulator

Area of Science:

• Materials Science
• Mechanical Engineering
• Synchrotron Radiation Science

Background:

• Advanced research at synchrotron facilities like MAX IV Laboratory requires highly stable and precise sample manipulation systems.
• Existing manipulators may face limitations in stability, accuracy, or adaptability for specialized experiments.

Purpose of the Study:

• To report the development and performance of a novel four-axis ultra-high-stability manipulator.
• To optimize design parameters for high eigen-frequencies, rigidity, and a compact footprint.
• To ensure compatibility with various experimental requirements through easily exchangeable manipulator rods.

Main Methods:

• Design and construction of a compact, lightweight X-Y table with a stiffened Z tower.
• Integration of a rotary seal for sample rod attachment.
• Optimization of structural parameters for high stiffness-to-weight ratio and low center of gravity.
• Experimental validation of dynamic and static performance characteristics.

Main Results:

• The manipulator exhibits a lowest eigen-frequency of 48.5 Hz.
• Long-term stability is achieved within the tens of nanometers range.
• Positioning accuracy is demonstrated to be better than 100 nm.
• Angular accuracy is within 500 nrad, with long-term stability in the hundreds of nanoradians.

Conclusions:

• The developed four-axis manipulator meets the stringent requirements for high-stability positioning at RIXS beamlines.
• Its design facilitates adaptability for diverse experimental needs.
• The system provides unprecedented accuracy and stability for advanced synchrotron-based research.