Time-resolved diffraction with an optimized short pulse laser plasma X-ray source

Area of Science:

• Materials Science
• Condensed Matter Physics
• X-ray Optics

Background:

• Time-resolved X-ray diffraction (TRXRD) is crucial for studying dynamic material processes.
• Existing TRXRD setups often lack flexibility and require specialized configurations.
• Advancements in X-ray sources are needed to improve resolution and data acquisition rates.

Purpose of the Study:

• To present a modular and adaptable setup for time-resolved X-ray diffraction.
• To optimize the system for high angular and momentum resolution using a laser-driven plasma X-ray source.
• To demonstrate the capability for high dynamic range measurements of transient material phenomena.

Main Methods:

• Utilized a short-pulse, laser-driven plasma X-ray source.
• Employed Ti K-alpha (4.51 keV) radiation from a Ti wire target.
• Integrated a toroidally bent crystal for X-ray collection, monochromatization, and focusing.
• Operated the system at a 10 Hz repetition rate.

Main Results:

• Achieved high angular/momentum resolution for TRXRD experiments.
• Delivered 10^7 Ti K-alpha photons per pulse with a relative bandwidth of 10^-4.
• Enabled high dynamic range (10^4) measurements of transient changes.
• Successfully measured laser-triggered strain waves in materials.

Conclusions:

• The presented modular TRXRD setup offers high flexibility for diverse applications.
• The system's optimization provides excellent resolution and sensitivity for dynamic material studies.
• This approach facilitates the investigation of ultrafast phenomena in materials with high precision.