Nanosecond X-ray photon correlation spectroscopy using pulse time structure of a storage-ring source.

Area of Science:

• Materials Science
• Condensed Matter Physics
• Photonics

Background:

• X-ray photon correlation spectroscopy (XPCS) is a standard method for investigating slow dynamics in complex systems.
• Achieving nanosecond time resolution in XPCS experiments is challenging due to detector speed and photon flux limitations.

Purpose of the Study:

• To demonstrate nanosecond time-resolved XPCS for studying fast dynamics in colloidal systems.
• To showcase the capability of the adaptive gain integrating pixel detector (AGIPD) for high-speed XPCS.

Main Methods:

• Utilized an adaptive gain integrating pixel detector (AGIPD) for high frame rate data acquisition.
• Operated the AGIPD at the intrinsic pulse structure of a storage ring source.
• Calculated correlation functions from single-pulse speckle patterns.

Main Results:

• Successfully achieved nanosecond time resolution in XPCS measurements.
• Determined correlation functions with a shortest correlation time of 192 nanoseconds.
• Demonstrated the feasibility of fast colloidal dynamics studies using AGIPD.

Conclusions:

• The AGIPD enables routine nanosecond XPCS studies at storage rings.
• This advancement opens new possibilities for investigating ultrafast phenomena in complex materials.
• Represents a significant step towards widespread adoption of fast XPCS techniques.