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Measurement of x-ray pulse widths by intensity interferometry
M Yabashi1, K Tamasaku, T Ishikawa
1SPring-8/JASRI, Mikazuki, Hyogo 679-5198, Japan.
Physical Review Letters
|June 13, 2002
Summary
Intensity interferometry precisely measured hard undulator radiation pulse width (32 ps, 14 keV). This technique accurately determines ultrafast X-ray pulse widths from advanced synchrotron light sources.
Area of Science:
- Physics
- Optics
- Materials Science
Background:
- Advanced synchrotron light sources produce high-energy X-rays.
- Precisely measuring ultrashort X-ray pulse durations is crucial for understanding fast physical processes.
- Existing methods may have limitations in time resolution or applicability.
Purpose of the Study:
- To determine the pulse width of hard undulator radiation.
- To demonstrate the capability of intensity interferometry for ultrafast X-ray pulse measurements.
- To establish a method applicable to next-generation synchrotron sources.
Main Methods:
- Intensity interferometry was employed to measure the pulse width.
- Hard undulator radiation with a 32 ps width and 14 keV energy was used.
- Various X-ray monochromators were utilized to cover a wide range of time frames (ns to fs).
Main Results:
- The pulse width of the hard undulator radiation was successfully determined.
- The intensity interferometry method proved effective for measuring ultrafast X-ray pulses.
- The technique demonstrated versatility across nanosecond (ns) to femtosecond (fs) time scales.
Conclusions:
- Intensity interferometry is a viable method for characterizing ultrafast X-ray pulses.
- This technique is suitable for current and future fourth-generation synchrotron light sources.
- Accurate pulse width determination is essential for advanced X-ray science applications.