A method to stabilize the incident X-ray energy for anomalous diffraction measurements

Area of Science:

• Crystallography
• Materials Science
• Synchrotron Radiation

Background:

• Anomalous diffraction requires precise incident X-ray energy.
• Fluctuations in X-ray energy can compromise data quality.
• Existing calibration methods may lack sufficient stability.

Purpose of the Study:

• To develop and validate a method for calibrating and stabilizing incident X-ray energy.
• To enhance the accuracy of anomalous diffraction data collection.
• To achieve sub-eV energy stability at synchrotron beamlines.

Main Methods:

• Implemented a feedback loop system.
• Utilized a double-crystal monochromator for energy control.
• Tested the method at the 1W2B single-crystal diffraction beamline.
• Monitored X-ray energy stability at the absorption edge inflection point.

Main Results:

• Successfully calibrated and stabilized incident X-ray energy.
• Achieved energy stability within a 0.2 eV range.
• Demonstrated the method's effectiveness at a synchrotron facility.
• Provided reliable energy control for anomalous diffraction.

Conclusions:

• The developed method effectively calibrates and stabilizes X-ray energy for anomalous diffraction.
• The sub-eV energy stability is crucial for high-quality diffraction data.
• This technique advances capabilities at synchrotron radiation facilities.