How best to use photons.

Area of Science:

• Crystallography
• Materials Science
• Biophysics

Background:

• Traditional X-ray diffraction data collection relied on integrating detectors like film, image plates, and CCDs.
• Advancements in beamline hardware and detector technology have shifted focus towards optimizing data collection strategies.
• Modern beamlines utilize fast pixel array detectors, making sample lifetime the primary constraint.

Purpose of the Study:

• To investigate optimal strategies for collecting X-ray diffraction data with modern equipment.
• To explore the parameter space of measurement strength versus data quantity in relation to sample lifetime.
• To provide guidance on utilizing modern beamline equipment effectively and conserving data acquisition when sample properties are unknown.

Main Methods:

• Experimental exploration of data collection parameters.
• Synthetic data treatment to model diffraction outcomes.
• Analysis of trade-offs between collecting fewer, stronger measurements versus more, weaker measurements.

Main Results:

• Identified optimal strategies for expending diffracted photons based on sample lifetime.
• Demonstrated how to best utilize equipment on modern X-ray diffraction beamlines.
• Developed recommendations for conservative data acquisition when sample stability is uncertain.

Conclusions:

• The choice between collecting fewer strong or more weak diffraction measurements depends critically on sample lifetime.
• Effective use of modern beamline technology requires adapting data collection strategies.
• Guidance is provided for maximizing data quality and quantity under various experimental constraints.