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Published on: January 16, 2017
The time-resolved hard X-ray diffraction endstation KMC-3 XPP at BESSY II
Matthias Rössle1, Wolfram Leitenberger2, Matthias Reinhardt1
1Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.
Journal of Synchrotron Radiation
|May 5, 2021
Summary
The KMC-3 XPP endstation uses time-resolved hard X-ray diffraction to study how thin films and heterostructures respond to laser or electric field pulses. This enables detailed investigation of structural dynamics with picosecond resolution.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Surface Science
Background:
- Investigating the dynamic structural response of materials to external stimuli is crucial for understanding their properties.
- Thin films and heterostructures are key components in many advanced technologies, requiring detailed characterization of their behavior under excitation.
- Existing methods may lack the time resolution or versatility to capture ultrafast structural changes.
Purpose of the Study:
- To present the capabilities of the KMC-3 XPP endstation for time-resolved hard X-ray diffraction experiments.
- To detail the setup for optical pump/X-ray probe investigations of laser- or electric-field-excited samples.
- To highlight the investigation of structural dynamics in thin films and heterostructures.
Main Methods:
- Utilizing the BESSY II electron storage ring for hard X-ray synchrotron radiation.
- Employing a four-circle diffractometer for access to various Bragg reflections.
- Implementing a femtosecond laser system for optical excitation at multiple wavelengths (1028 nm, 514 nm, 343 nm) and varying sample temperatures (15-350 K).
- Achieving 17 ps time-resolution via the 'low-α' storage ring mode and electronic delay variation for pump-probe experiments.
- Utilizing gated area pixel detectors or fast point detectors for direct time-resolved X-ray detection.
Main Results:
- The KMC-3 XPP endstation is operational for time-resolved structural dynamics studies.
- The system enables investigation of picosecond to microsecond timescale responses.
- Demonstrated capability to study structural changes in thin films and heterostructures upon excitation.
Conclusions:
- The KMC-3 XPP endstation provides a powerful platform for ultrafast structural dynamics research.
- The endstation facilitates a wide range of experiments on laser- or electric-field-excited materials.
- This capability advances the understanding of material behavior under dynamic conditions.
Keywords:
beamline instrumentationferroelectric switchingoptical excitationthermal transporttime-resolved X-ray diffractionMore Related Videos
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