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Microfocus Cu K(alpha) source for femtosecond x-ray science
Nickolai Zhavoronkov1, Yuri Gritsai, Matias Bargheer
1Max-Born-Institute, Max-Born-Strasse 2 A, 12489 Berlin, Germany. zhavoron@mbi-berlin.de
Optics Letters
|August 4, 2005
Summary
We developed a new femtosecond X-ray source for time-resolved diffraction. This high-flux, quasi-point source offers subpicosecond X-ray pulses for advanced materials research.
Area of Science:
- Physics
- Materials Science
- Physical Chemistry
Background:
- Time-resolved diffraction requires precise X-ray probes.
- Existing X-ray sources often lack the necessary temporal resolution or flux.
- Minimizing temporal jitter between pump and probe is critical for accurate measurements.
Purpose of the Study:
- To develop and characterize a novel femtosecond X-ray source.
- To enable advanced time-resolved diffraction experiments.
- To improve the temporal synchronization of X-ray probes and laser pumps.
Main Methods:
- Utilized a femtosecond laser system to generate X-rays.
- Implemented a new optical geometry for enhanced stability and alignment.
- Characterized X-ray emission properties including size, flux, and temporal duration.
Main Results:
- Demonstrated a subpicosecond, 1 kHz femtosecond X-ray source.
- Achieved a quasi-point source size of 10 micrometers.
- Obtained a maximum Cu K(alpha) flux of 6.8 x 10^10 photons/s.
- Verified continuous operation for 10 hours.
- Implemented a geometry that reduces temporal jitter.
Conclusions:
- The developed X-ray source is suitable for high-resolution time-resolved diffraction.
- The new geometry significantly improves experimental stability and accuracy.
- This advancement facilitates the study of ultrafast dynamics in materials.